The G.Skill F4-4000C18D-32GVK is a kit of two 16GB DDR4-4000 memory modules (PC4-32000) from the Ripjaws V series. The total capacity is 32 GB. The modules are programmed to latencies of 18-22-22-42 at 4000 MHz. The Ripjaws V series DDR4 modules are designed for maximum compatibility and performance with Intel processors. The Ripjaws V can be used with a wide range of CPU coolers thanks to the 42mm height. The current version 2.0 of Intel's Memory Profile XMP is supported.
The G.Skill F4-4000C18D-32GVK is a kit of two 16GB DDR4-4000 memory modules (PC4-32000) from the Ripjaws V series. The total capacity is 32 GB. The modules are programmed to latencies of 18-22-22-42 at 4000 MHz. The Ripjaws V series DDR4 modules are designed for maximum compatibility and performance with Intel processors. The Ripjaws V can be used with a wide range of CPU coolers thanks to the 42mm height. The current version 2.0 of Intel's Memory Profile XMP is supported.
in 3 offers
The lowest price for G.SKILL Ripjaws V 32GB 2x16GB DDR4 4000MHz RAM Black right now is $199.00 at PCByte AU, compared across 3 retailers.
The all-time low was $146.32 on 15 Sept 2025 — today's price is 36% above the lowest ever. It has been notably cheaper before — worth setting a price alert.
Prices last updated 1 Aug 2026.
G.SKILL Ripjaws V 32GB 2x16GB DDR4 4000MHz RAM Black
The G.Skill F4-4000C18D-32GVK is a kit of two 16GB DDR4-4000 memory modules (PC4-32000) from the Ripjaws V series. The total capacity is 32 GB. The modules are programmed to latencies of 18-22-22-42 at 4000 MHz. The Ripjaws V series DDR4 modules are designed for maximum compatibility and performance with Intel processors. The Ripjaws V can be used with a wide range of CPU coolers thanks to the 42mm height. The current version 2.0 of Intel's Memory Profile XMP is supported.
The G.Skill F4-4000C18D-32GVK is a kit of two 16GB DDR4-4000 memory modules (PC4-32000) from the Ripjaws V series. The total capacity is 32 GB. The modules are programmed to latencies of 18-22-22-42 at 4000 MHz. The Ripjaws V series DDR4 modules are designed for maximum compatibility and performance with Intel processors. The Ripjaws V can be used with a wide range of CPU coolers thanks to the 42mm height. The current version 2.0 of Intel's Memory Profile XMP is supported.
Last updated at 01/08/2026 21:46:29
G.Skill 16GB (2x8GB)F4-4000C18D-16GVK Ripjaws V 4000MHz CL18 DDR4 RAM
[F4-4000C18D-16GVK] G.Skill Ripjaws V 16GB(2X8GB) DDR4 4000Mhz Dual Module CL18 Memory Black
Free delivery between Tue – Wed
G.skill DIMM 32GB DDR4-4000 kit, memory
Free delivery
originally posted on newegg.com
X570 motherboard (ASUS ROG crosshair hero VIII) with this memory kit populating the 4 available DIMM slots. No overclocking at all, other than setting BIOS DOCP to DDR-3200 to match physical memory specs. System ran fine for over a year, then windows started random BSODs. Spent months debugging the BSODs: windows OS, memory, OS updates, drivers, software, dumps, BIOS updates, power supply, you name it. Turns out the memory will no longer run at 3200 MHz. If I leave EVERYTHING as it was in the BIOS and just reduce memory frequency to 3133 MHz, we are back to rock solid. If I set memory frequency back to 3200 MHz random BSOD, even if I up the CAS to 18. Given that this happened after a year of no problems I would imagine there is *something* that has fallen out of ... MoreX570 motherboard (ASUS ROG crosshair hero VIII) with this memory kit populating the 4 available DIMM slots. No overclocking at all, other than setting BIOS DOCP to DDR-3200 to match physical memory specs. System ran fine for over a year, then windows started random BSODs. Spent months debugging the BSODs: windows OS, memory, OS updates, drivers, software, dumps, BIOS updates, power supply, you name it. Turns out the memory will no longer run at 3200 MHz. If I leave EVERYTHING as it was in the BIOS and just reduce memory frequency to 3133 MHz, we are back to rock solid. If I set memory frequency back to 3200 MHz random BSOD, even if I up the CAS to 18. Given that this happened after a year of no problems I would imagine there is *something* that has fallen out of spec with the memory and I was probably lucky that this worked at spec when it did. Note: there is not a big difference between 3133 MHz and 3200 MHz, but the point is I bought a 64GB 3200MHz kit.
originally posted on neweggbusiness.com
RAM is probably the easiest thing to upgrade in any system - but I'm going to advise you to buy the RAM you need up front - here is why: There are 3 main manufacturers of RAM (the actual chips soldered to the RAM module). There are manufacturing differences between the 3, which means performance variation. The way RAM controllers work, you will only achieve the best performance of your worst module. The way RAM errors manifest - you will experience anything from intermittent computer crashes to complete inability to post. Matched kits ensure that the actual RAM chips soldered to the module are from a single manufacturer - and everything is tested for compatibility. You're virtually guaranteed to get memory that works as rated, from any manufacturer. But if you buy ... MoreRAM is probably the easiest thing to upgrade in any system - but I'm going to advise you to buy the RAM you need up front - here is why: There are 3 main manufacturers of RAM (the actual chips soldered to the RAM module). There are manufacturing differences between the 3, which means performance variation. The way RAM controllers work, you will only achieve the best performance of your worst module. The way RAM errors manifest - you will experience anything from intermittent computer crashes to complete inability to post. Matched kits ensure that the actual RAM chips soldered to the module are from a single manufacturer - and everything is tested for compatibility. You're virtually guaranteed to get memory that works as rated, from any manufacturer. But if you buy an 8 GB module today with the intent of adding another 8 GB in 6 months, you don't get that same assurance - even if you order the same SKU again - manufacturing revisions are rarely advertised and are not readily apparent to customers in most cases (not just with memory). Here is how to buy RAM: 1) Make sure it will fit in your system - low profile RAM exists for a reason 2) Buy the capacity, frequency, & CAS you need and want up-front 3) Deals happen around memory frequency, more than capacity - example: you will find 3200+ speed priced in the 2400-ish speed range, at times 4) Don't overbuy on Frequency or CAS - extra capacity can be justified as adding to the projected life of a system - Frequency & CAS might add a couple FPS today, but long-term won't mean much 5) Remember aesthetic frills, like RGB lighting, don't improve your gaming or content creation experience 6) Yes, you can overclock memory - don't expect to get significantly more performance than you paid for Boiled down - know the specs you need, buy RAM with those specs.
originally posted on ebay.com
Awesome stuff! It's a pity it's too fast for my motherboard (Z370) and Intel Core-I7 9700K - they run only at the speed of 2666MHz, and motherboard (DELL XPS 8930) doesn't have any capabilities to utilize the speed of this RAM, as CPU either. But anyway, even at the speed of 2888MHz my PC runs great! I had SK Hynix RAM 2666MHz before but after changing PCIe NVMe SSD for a faster one it began crashing and BSOD'ing, so I decided to buy this one - got a very good deal for 64GBs of 3200MHz RAM. All in all it's a very good RAM. The board recognized it as soon as I installed it. Took once to reboot, and I was ready to go. Swell! Recommended. By the way, it is made by SK Hynix - the chips.
| General | |
| Capacity | 32 GB: 2 x 16 GB |
| Upgrade Type | Generic |
| Height | 42 mm |
| Memory |
G.Skill 16GB (2x8GB)F4-4000C18D-16GVK Ripjaws V 4000MHz CL18 DDR4 RAM
[F4-4000C18D-16GVK] G.Skill Ripjaws V 16GB(2X8GB) DDR4 4000Mhz Dual Module CL18 Memory Black
Free delivery between Tue – Wed
G.skill DIMM 32GB DDR4-4000 kit, memory
Free delivery
X570 motherboard (ASUS ROG crosshair hero VIII) with this memory kit populating the 4 available DIMM slots. No overclocking at all, other than setting BIOS DOCP to DDR-3200 to match physical memory specs. System ran fine for over a year, then windows started random BSODs. Spent months debugging the BSODs: windows OS, memory, OS updates, drivers, software, dumps, BIOS updates, power supply, you name it. Turns out the memory will no longer run at 3200 MHz. If I leave EVERYTHING as it was in the BIOS and just reduce memory frequency to 3133 MHz, we are back to rock solid. If I set memory frequency back to 3200 MHz random BSOD, even if I up the CAS to 18. Given that this happened after a year of no problems I would imagine there is *something* that has fallen out of ... MoreX570 motherboard (ASUS ROG crosshair hero VIII) with this memory kit populating the 4 available DIMM slots. No overclocking at all, other than setting BIOS DOCP to DDR-3200 to match physical memory specs. System ran fine for over a year, then windows started random BSODs. Spent months debugging the BSODs: windows OS, memory, OS updates, drivers, software, dumps, BIOS updates, power supply, you name it. Turns out the memory will no longer run at 3200 MHz. If I leave EVERYTHING as it was in the BIOS and just reduce memory frequency to 3133 MHz, we are back to rock solid. If I set memory frequency back to 3200 MHz random BSOD, even if I up the CAS to 18. Given that this happened after a year of no problems I would imagine there is *something* that has fallen out of spec with the memory and I was probably lucky that this worked at spec when it did. Note: there is not a big difference between 3133 MHz and 3200 MHz, but the point is I bought a 64GB 3200MHz kit.
RAM is probably the easiest thing to upgrade in any system - but I'm going to advise you to buy the RAM you need up front - here is why: There are 3 main manufacturers of RAM (the actual chips soldered to the RAM module). There are manufacturing differences between the 3, which means performance variation. The way RAM controllers work, you will only achieve the best performance of your worst module. The way RAM errors manifest - you will experience anything from intermittent computer crashes to complete inability to post. Matched kits ensure that the actual RAM chips soldered to the module are from a single manufacturer - and everything is tested for compatibility. You're virtually guaranteed to get memory that works as rated, from any manufacturer. But if you buy ... MoreRAM is probably the easiest thing to upgrade in any system - but I'm going to advise you to buy the RAM you need up front - here is why: There are 3 main manufacturers of RAM (the actual chips soldered to the RAM module). There are manufacturing differences between the 3, which means performance variation. The way RAM controllers work, you will only achieve the best performance of your worst module. The way RAM errors manifest - you will experience anything from intermittent computer crashes to complete inability to post. Matched kits ensure that the actual RAM chips soldered to the module are from a single manufacturer - and everything is tested for compatibility. You're virtually guaranteed to get memory that works as rated, from any manufacturer. But if you buy an 8 GB module today with the intent of adding another 8 GB in 6 months, you don't get that same assurance - even if you order the same SKU again - manufacturing revisions are rarely advertised and are not readily apparent to customers in most cases (not just with memory). Here is how to buy RAM: 1) Make sure it will fit in your system - low profile RAM exists for a reason 2) Buy the capacity, frequency, & CAS you need and want up-front 3) Deals happen around memory frequency, more than capacity - example: you will find 3200+ speed priced in the 2400-ish speed range, at times 4) Don't overbuy on Frequency or CAS - extra capacity can be justified as adding to the projected life of a system - Frequency & CAS might add a couple FPS today, but long-term won't mean much 5) Remember aesthetic frills, like RGB lighting, don't improve your gaming or content creation experience 6) Yes, you can overclock memory - don't expect to get significantly more performance than you paid for Boiled down - know the specs you need, buy RAM with those specs.
Awesome stuff! It's a pity it's too fast for my motherboard (Z370) and Intel Core-I7 9700K - they run only at the speed of 2666MHz, and motherboard (DELL XPS 8930) doesn't have any capabilities to utilize the speed of this RAM, as CPU either. But anyway, even at the speed of 2888MHz my PC runs great! I had SK Hynix RAM 2666MHz before but after changing PCIe NVMe SSD for a faster one it began crashing and BSOD'ing, so I decided to buy this one - got a very good deal for 64GBs of 3200MHz RAM. All in all it's a very good RAM. The board recognized it as soon as I installed it. Took once to reboot, and I was ready to go. Swell! Recommended. By the way, it is made by SK Hynix - the chips.
I want to like this memory kit, but I can't recommend it based on my current experience. I bought the 16GB 3600 to better sync with my Ryzen 3600x CPU, and it appeared at first like it was worth it; after installing the new RAM, booting to the BIOS and changing the speed profile to the D.O.C.P. of 18-22-22-42 and speed of 3600, I restarted and booted into Windows. Upon checking the Windows tools, I saw that I was indeed getting the speed advertised, which was great! Then the problems started. After starting up some programs, I started to notice crashes. Sometimes it would just be a single program, sometimes it would be the entire OS and I would get a blue screen and automatic reboot. I went back to the BIOS, checked my clock speeds were correct, shut down everything ... MoreI want to like this memory kit, but I can't recommend it based on my current experience. I bought the 16GB 3600 to better sync with my Ryzen 3600x CPU, and it appeared at first like it was worth it; after installing the new RAM, booting to the BIOS and changing the speed profile to the D.O.C.P. of 18-22-22-42 and speed of 3600, I restarted and booted into Windows. Upon checking the Windows tools, I saw that I was indeed getting the speed advertised, which was great! Then the problems started. After starting up some programs, I started to notice crashes. Sometimes it would just be a single program, sometimes it would be the entire OS and I would get a blue screen and automatic reboot. I went back to the BIOS, checked my clock speeds were correct, shut down everything and reseated the RAM to make sure it was all correct on the hardware side, then tried again. More crashes. So I went back into the BIOS a third time and removed the D.O.C.P., set everything back to Auto, went back to the default clock speeds and rebooted. Reboot successful, and no crashes from then on. But I was only getting a clock speed of 2133 instead of 3600, because that's apparently the default for DDR4. I ran Windows' Memory Diagnostic to make sure, and sure enough there were hardware issues detected. Just to make sure, I shut everything down again, uninstalled the new RAM and reinstalled my old RAM, and my system booted and is running right now (it's how I'm writing this review in fact) without crashing or any memory errors detected. So like I said at the top, I want to like this memory kit, but I cannot get it to run at a 3600 speed without crashes occurring. It appears that the kit I have is defective and can't run at 3600, since I believe that I eliminated every other potential factor for the issue. My relevant system specs are below if that's helpful to someone else browsing here; (this memory kit is on the QVL for my motherboard, so I know that's not the issue.) Motherboard: ASUS TUF-Gaming B550M-Plus CPU: Ryzen 5 3600x RAM: (well, that's what this is about, isn't is?)
I bought this kit primarily to have 32GB of memory because outside of gaming I occasionally work from home and all of my work tools alone use nearly 9GB just to be open. Meanwhile, all of the extra bits of software on my home PC (Corsair Icue, Razer Synapse, etc.) float around 4.5GB idle. Almost maxing out my memory when working didn't sit well with me. An unintended consequence was having mismatched but at the same time somehow matching RAM modules. When I first built my rig back in Dec 2020/Jan 2021 I grabbed a kit Ripjaws V memory to start with. They looked more gun metal grey to me than they did black. Went back and looked at my order history and turns out they are in fact a grey color, something I missed when making the initial purchase. This time I bought the ... MoreI bought this kit primarily to have 32GB of memory because outside of gaming I occasionally work from home and all of my work tools alone use nearly 9GB just to be open. Meanwhile, all of the extra bits of software on my home PC (Corsair Icue, Razer Synapse, etc.) float around 4.5GB idle. Almost maxing out my memory when working didn't sit well with me. An unintended consequence was having mismatched but at the same time somehow matching RAM modules. When I first built my rig back in Dec 2020/Jan 2021 I grabbed a kit Ripjaws V memory to start with. They looked more gun metal grey to me than they did black. Went back and looked at my order history and turns out they are in fact a grey color, something I missed when making the initial purchase. This time I bought the black ones. The neat thing out of the purchase is the alternating DIMM slots on my motherboard are black and grey with the grey being the first two slots to populate. Overall I would recommend these to anyone who has a tighter budget trying to build a new machine. They may be priced a bit higher than some other brands but they look better and more importantly, just as an opinion again, I wouldn't recommend some of these other brands just yet as I don't feel they have been around long enough to warrant absolute trust in them.
Slapped these into a Ryzen 7 3800x, MSI MPG X570 Gaming Pro Carbon Wifi setup and they posted no problem, but were running at 2133mhz. NOT the 3600mhz I was hoping for. I went into Bios and set the A-XMP profile to both 1 and 2 on different boots and did not have any change in speed. Clearly a compatibility issue with the motherboard/cpu combo. After doing some digging through the googles I was able to get these running at 3200Mhz by adjusting a few items. This worked for me, it may not work for you. DO AT YOUR OWN RISK Adjusted the following Enable A-Xmp Manually Set speed: 3200Mhz Dram Voltage: 1.35 Soc Voltage: 1.1 During testing this was the highest speed I could get the RAM to operate without the motherboard having issues posting. Had to flash CMOS a few times ... MoreSlapped these into a Ryzen 7 3800x, MSI MPG X570 Gaming Pro Carbon Wifi setup and they posted no problem, but were running at 2133mhz. NOT the 3600mhz I was hoping for. I went into Bios and set the A-XMP profile to both 1 and 2 on different boots and did not have any change in speed. Clearly a compatibility issue with the motherboard/cpu combo. After doing some digging through the googles I was able to get these running at 3200Mhz by adjusting a few items. This worked for me, it may not work for you. DO AT YOUR OWN RISK Adjusted the following Enable A-Xmp Manually Set speed: 3200Mhz Dram Voltage: 1.35 Soc Voltage: 1.1 During testing this was the highest speed I could get the RAM to operate without the motherboard having issues posting. Had to flash CMOS a few times during this to clear configs and retry. Overall affordable RAM but just double check on compatibility with the motherboard manufacture prior to purchase. Ended up putting these in my partners computer since the lower speed won't be a concern for them.
My set up: MB: Asrock B450M Pro4 CPU: Ryzen 5 3600 (65W TDP) SSD: ADATA XPG SX8100 M.2 PCIe NVME SSD (.33W active) Video Card: MSI GT710 ( Less than 20W ) PSU: Fatality Gaming 550W (An overkill for this system) and of course this pair of G.Skill Ripjaws V 8GBx2 SDRAM add to a total of 16GB RAM for my Linux workstation setup. During the initial set up phase, I didn't try any overclocking as usual, only turn on the XMP2.0 profile in MB which set the memory frequency to 3200 Mhz. Loaded the Linux Kernel 4.15.0.54, everything worked just fine. As soon as upgraded to Kernel 4.15.0.70, the system started to behave with a number of hiccups. The most annoying one is when I power down the computer, the fans are still running until I manually turn off the computer. After a ... MoreMy set up: MB: Asrock B450M Pro4 CPU: Ryzen 5 3600 (65W TDP) SSD: ADATA XPG SX8100 M.2 PCIe NVME SSD (.33W active) Video Card: MSI GT710 ( Less than 20W ) PSU: Fatality Gaming 550W (An overkill for this system) and of course this pair of G.Skill Ripjaws V 8GBx2 SDRAM add to a total of 16GB RAM for my Linux workstation setup. During the initial set up phase, I didn't try any overclocking as usual, only turn on the XMP2.0 profile in MB which set the memory frequency to 3200 Mhz. Loaded the Linux Kernel 4.15.0.54, everything worked just fine. As soon as upgraded to Kernel 4.15.0.70, the system started to behave with a number of hiccups. The most annoying one is when I power down the computer, the fans are still running until I manually turn off the computer. After a couple of days of troubleshooting ruled out all of the potential software causes, I then started to look into each of the hardware components. What a surprise! The memory test shows errors in a number of tests. What? no overclocking, auto adjusted voltages pumps 1.35V to the SDRAMs, running at the advertised 3200 frequency rate, gives errors? As soon as I reduce the clock to 3133Mhz, all of memory test errors are gone! In my twenty years of building and testing hundreds of computers. This is the first time I have had such experience. Typically, RAM are advertised conservatively with a lot of head rooms because there are many potential reasons could impair their actual performance. If one is lucky, such as the system I build a couple of weeks ago. I was able to overclock a 2666Mhz rated RAM to 3200Mhz without increasing the voltage. I would not complain if I was able to run at the nominal 3200Mhz and see no memory test errors. However, if there is 1 Mhz lower than what's advertised, then I would still not complain. But 67Mhz, which is 2% lower than advertised speed. Then I'd definitely voice my opinions. While other SDRAMs give a lot of head rooms, this SDRAM can' t hold the advertised frquency. That means, the quality of this pair SDRAM is lower than many SDRAMs I have used before. I could be the lucky one of receiving this bad pair. Well, originally, I planned to return this item. I managed to placed this pair of SDRAM in another system which reached the advertised 3200Mhz without showing errors. I used a different set of SDRAM of another brand in this system to reach a better clock rate at 3333Mhz. Thus, I decided to cancel the return request in order to meet the project deadlines. Anyway, my experience stands and just like to share my experience here. To be fair, I give it three eggs as a neutal score, instead of 1 egg I gave to it at first.
Running these guys at 3733 @ XMP timings no problem. Ryzen 3600 on MSI B450 Tomahawk. I'm giving them 1.375v but I'm not sure they even need the voltage bump to do it. Been busy enjoying them after initially verifying stability at this speed which is essentially the sweet spot for Ryzen performance. Memtest using test 5 and 8 - 10 passes stable and loving it. I will eventually try bringing the secondary timings to 16 from 19 but for now I'm really digging the performance for the price. Why waste money on b-die? 32gb capacity in a near b-die specced kit @ this price WOWSA this kit somehow gets you everything for less money by far RYZEN 3000 USERS HAVING TROUBLE WITH XMP - NOT ALL BOARDS WILL CORRECTLY AUTO ADJUST VOLTAGE WITH XMP SO MANUALLY SET vDIMM/MEMORY VOLTAGE ... MoreRunning these guys at 3733 @ XMP timings no problem. Ryzen 3600 on MSI B450 Tomahawk. I'm giving them 1.375v but I'm not sure they even need the voltage bump to do it. Been busy enjoying them after initially verifying stability at this speed which is essentially the sweet spot for Ryzen performance. Memtest using test 5 and 8 - 10 passes stable and loving it. I will eventually try bringing the secondary timings to 16 from 19 but for now I'm really digging the performance for the price. Why waste money on b-die? 32gb capacity in a near b-die specced kit @ this price WOWSA this kit somehow gets you everything for less money by far RYZEN 3000 USERS HAVING TROUBLE WITH XMP - NOT ALL BOARDS WILL CORRECTLY AUTO ADJUST VOLTAGE WITH XMP SO MANUALLY SET vDIMM/MEMORY VOLTAGE TO 1.35v-1.4v WHEN YOU ENABLE XMP (before saving and rebooting) RYZEN 2000 and 1000 series users!! YOUR CPU CANNOT SUPPORT MEMORY SPEED OF 3600mhz! This is not this or any other kit's fault, nor your motherboard's, but is a limitation of the cpu's OMC -> those older cpus have less capable onboard memory controllers preventing them from getting memory frequency much above 3000-3200mhz. This is still a great kit for you to get that you can run at higher speeds when you upgrade to Ryzen 3000. Almost all boards will allow you to set XMP and then manually set your memory frequency to what will be stable with Ryzen 1000/2000 cpus (3000mhz is pretty reliably stable on those cpus without tinkering) This way you do not have to mess with timings just to achieve stability. You can of course achieve even tighter timings and slightly higher speeds (3200mhz+) if you are an experienced overclocker. TLDR- TO REACH 3600mhz @ XMP SETTINGS YOU NEED TO BE RUNNING RYZEN 3000 SERIES CPU OR RECENT GEN INTEL. IF RYZEN 2000/1000 SERIES - YOUR CPU LIMITS YOUR MEMORY SPEED - SET XMP TO ENABLE, VDIMM VOLTAGE TO 1.3v AND LOWER FREQ TO 3000MHZ AND ENJOY TILL YOU UPGRADE CPU
UPDATE: I got this RAM. Today's price is now the same and no sale. The date on the sticks' labels were August 2021. I did some pre-install benchmark and stability tests. I found I did have issues with AVX-512 instructions in OCCT causing a couple cores to error, and Prime95 small fft just rebooting the system. I restored some bios defaults, then was stable. The problem was some overclock I had done that seemed to allow unlimited Watts. So my setup can cool up to ~200W hitting 100C. I was seeing an immediate spike to 250W and hitting thermal limits. I installed these two additional sticks in the remaining slots for a total of four. I applied DOCP profile, and set SOC 1.1V. I booted fine usually. Once I got a safe mode boot from the BIOS and had to reapply DOCP. As ... MoreUPDATE: I got this RAM. Today's price is now the same and no sale. The date on the sticks' labels were August 2021. I did some pre-install benchmark and stability tests. I found I did have issues with AVX-512 instructions in OCCT causing a couple cores to error, and Prime95 small fft just rebooting the system. I restored some bios defaults, then was stable. The problem was some overclock I had done that seemed to allow unlimited Watts. So my setup can cool up to ~200W hitting 100C. I was seeing an immediate spike to 250W and hitting thermal limits. I installed these two additional sticks in the remaining slots for a total of four. I applied DOCP profile, and set SOC 1.1V. I booted fine usually. Once I got a safe mode boot from the BIOS and had to reapply DOCP. As long as I was able to boot to my OS for stability tests everything is stable. I upgraded my bios from 2802 to 4021. The 4021 BIOS for some reason enables CSM mode stating my VGA is not supported in UEFI mode. (I have 1x1070 and 1xr9 290 installed). I'm not sure which card is unsupported, but it's a new complaint from the BIOS I haven't seen before. I enabled DOCP and stress tested fine. Next, I enabled PBO and still stress tested fine. I think CSM enabled mode increases boot time and so many people turn it off unless they need it. I verified secure boot still works so this is acceptable to me. I stress test with Prime95 small, OCCT small extreme steady, TestMem5 with Extreme1 @anta777, and CB20. CB20 score is 7240, and is about +120 better than PBO disabled. OCCT benchmark scores are 61.6/782/124.6/1437. I think limits reached are PPT 186W, TDC 130A, EDC 160A. I'm on an XSPC Rasa waterblock from 2011, rx360 v1 rad, Asus tuf x570 gaming (wi-fi), r9 3900x. Ram tuning is next. I really hesitate to try any higher frequency than 3600. I was able to boot 3733 on two sticks. I think I'll just try to tighten things up at 3600. I'd like to be able to cool a bit better. I know a bit of thermodynamics and I think the only way to do much improvement would be to lower the temperature of the waterblock fins and coolant. Radiator reviewers' tests show raising flow rates has little impact and I've noticed that as well. I guess what I'm saying is I'd like to be able to soak 250W instantaneous from the CPU without hitting a thermal limit and I'm not sure how a waterblock needs to be fixed to do that. I suspect maybe a very thin wall or better thermal conductivity- eg more surface area to the water and less distance to heat source. Oh, I need to find a better benchmark than CB20 anyway. Something that measures work done per time. Because you can throw 142W or 180W at CB20 and not see much difference. But if you throw 180W at a more appropriate workload like AVX, you would see gains, I'm thinking. Anyway, strong ram IMO.
| General | |
| Capacity | 32 GB: 2 x 16 GB |
| Upgrade Type | Generic |
| Height | 42 mm |
| Memory |
