Last updated at 01/09/2026 21:33:28
Intel Core i9-9900X X-Series Processor 10 Cores up to 4.4GHz Turbo Unlocked LGA2066 X299 Series 165W Processors (999AC5)
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Intel Core i9-9900X X-series Processor
Delivery $28.43
Intel Core i9-9900X Skylake X Series Desktop Processor, 10-Core 20 Thread 3.5 GHz (4.4 GHz Turbo), LGA 2066, 165W, Unlocked, Cooling device not inclu
Delivery between 4ā10 Sept $40.37
Core i9-9900X X-Series Processor 10 Cores up to 4.4GHz Turbo Unlocked LGA2066 X299 Series 165W Processors (999AC5)
Delivery between 8ā11 Sept $29
[Used] Intel Core i9-9900X 10 Core 3.5GHz LGA2066 / 19.25MB Cache CPU BX80673I99900X [BOX]
Free delivery
[Used] Intel Core i9-9900X 10 Core 3.5GHz LGA2066 / 19.25MB Cache CPU BX80673I99900X (BOX)
Free delivery
Intel Core I9 X I9-9900x Deca-core 10 Core 3.50 GHZ | Part # BX80673I99900X
originally posted on bestbuy.com
This CPU is comparable to the popular "Best Gaming CPU" i9-9900k when it comes to gaming performance, but has the extra PCIe lanes and features for an enthusiast build. It's highly overclockable if you have the cooling for it and is a great pair with the new RTX series graphics cards.
originally posted on bestbuy.com
So far so good. I am also adding memory also with processor and I am very satisfied with the performance.
originally posted on newegg.com
Solid processor, no problems with settings or overclocking. Does produce a lot of heat under heavy load, even at "normal" speeds, so liquid cooling strongly recommended.
| General | |
| Product Type | Processor |
| Processor | |
| Type / Form Factor | Intel Core i9 9900X X-series (9th Gen) |
| Number of Cores | 10-core |
Intel Core i9-9900X X-Series Processor 10 Cores up to 4.4GHz Turbo Unlocked LGA2066 X299 Series 165W Processors (999AC5)
Affiliate Disclosure: We may receive a small commission for purchases made through this link at no extra cost to you. This helps support our site. Thank you!
Intel Core i9-9900X X-series Processor
Delivery $28.43
Intel Core i9-9900X Skylake X Series Desktop Processor, 10-Core 20 Thread 3.5 GHz (4.4 GHz Turbo), LGA 2066, 165W, Unlocked, Cooling device not inclu
Delivery between 4ā10 Sept $40.37
Core i9-9900X X-Series Processor 10 Cores up to 4.4GHz Turbo Unlocked LGA2066 X299 Series 165W Processors (999AC5)
Delivery between 8ā11 Sept $29
[Used] Intel Core i9-9900X 10 Core 3.5GHz LGA2066 / 19.25MB Cache CPU BX80673I99900X [BOX]
Free delivery
This CPU is comparable to the popular "Best Gaming CPU" i9-9900k when it comes to gaming performance, but has the extra PCIe lanes and features for an enthusiast build. It's highly overclockable if you have the cooling for it and is a great pair with the new RTX series graphics cards.
So far so good. I am also adding memory also with processor and I am very satisfied with the performance.
Solid processor, no problems with settings or overclocking. Does produce a lot of heat under heavy load, even at "normal" speeds, so liquid cooling strongly recommended.
I run the gamut of applications each day from spreadsheets to coding to video rendering, several browser tabs active, CCTV monitoring, satellite tracking, satellite telemetry gathering and conversion, 32+ channel outboard audio interface, DAW, nearly 20 COM ports both hardware RS-232 type and USB. It is sweet to be able to just do that without having to close or even minimize applications, just having them available for access multiple times in the day. Three monitors make that easy as far as real estate so this processor lets me take advantage of "desk space". Most appreciated is the hardware interaction with the audio interface over Thunderbolt and radio hardware through the COM ports. Audio latency is very low and all of the external connections run without a ...Ā MoreI run the gamut of applications each day from spreadsheets to coding to video rendering, several browser tabs active, CCTV monitoring, satellite tracking, satellite telemetry gathering and conversion, 32+ channel outboard audio interface, DAW, nearly 20 COM ports both hardware RS-232 type and USB. It is sweet to be able to just do that without having to close or even minimize applications, just having them available for access multiple times in the day. Three monitors make that easy as far as real estate so this processor lets me take advantage of "desk space". Most appreciated is the hardware interaction with the audio interface over Thunderbolt and radio hardware through the COM ports. Audio latency is very low and all of the external connections run without a thought. More "invisible". I like to experiment but I am not a hard core overclocker, mainly because of the time involved to get that ultimate tweak and the chances of a crash while doing so or when pressing the limit that are intolerable because of the amount and bunch o' applications work I do. The 4.6 GHz is smooth since I set it and the temperatures are great, IMO. Again that's not something I follow in detail, the CPU is water cooled and max I've seen in normal use is around 63C, not running any hard synthetic benchmarks since I'm not a speed freak like I said. Idle with several stock apps is 30-35C depending on room temp (usually 76F, more or less) and bouncing up to 40C on some cores when something takes off to do something relatively intensive. I do close many applications when I game, which is a result of the fact that I game late at night after I do all that work and also to guarantee I'm not hosing myself in the game by having something running that I don't need while I'm gaming, anyway. With VR, Elite: Dangerous and Half-Life: Alyx run smooth and temps are good, at or below 60 (all seen after I take the VR headset off on the monitor history) and the GPU takes a good chunk of that work, of course. So GPU runs no more than 60C as well, the interior temp is good even though the CPU radiator is is using intake fans. I don't know what else to say, it's a great CPU for varied use and games like a champ, I'm not a hardware fanatic as far as benchmark speed and it overclocked nicely and easily, giving me a bit more base oomph with very little apparent temperature change so I would recommend it if you are doing various things on a PC. If you are looking for a gaming PC the other chips like i9-9900K may be what to look at, if you wanted a dedicated video rendering PC or maybe a CAD software/design PC this may be your ticket. For my use as described, it's the low end of this class of CPU and cores are like shiny things that attract people just by their numbers these days, but the price and performance are very right for the type of use I hopefully described well enough for you to understand in your considerations for your expected use.
Great for a specific project we had where the appliance died.
Had CPU for about a month now and it runs great. Mine has been idling at about 40 degrees Celsius which I was concerned about but no issues so far and my tower does not get very hot.
Skylake-X refresh is quite good with interesting overclocking process STIM and increased cache size makes them fast & reliable
This processor (Intel i9-9900x) works just as advertised. It runs Intel Turbo Boost properly. It runs cooler than previous comparable processors. It overclocks very nicely using MSI Afterburner. Be sure to use an adequate cooling source, preferably water cooled. I use an AIO triple fan. I would recommend this processor to anyone with a X299 motherboard.
Very nice processor and I am satisfied with the performance
I bought this chip for my new video editing computer. The 14 and 16 core chips seemed to over heat when you really push them. This chip over clocked to 4.7Ghz with water cooling runs around 60F at idle and around 120F maxed out between 98-100%. I am running Windows 10 Pro with all the garbage stripped out. This is the one advantage of building your own system.
| General | |
| Product Type | Processor |
| Processor | |
| Type / Form Factor | Intel Core i9 9900X X-series (9th Gen) |
| Number of Cores | 10-core |
Intel BX80673I99900X Core i9 9900X 3.5GHz 10 Core CPU
IntelĀ® Coreā¢ i9-9900X X-series Processor (19.25M Cache, up to 4.50 GHz) - Product Specifications
IntelĀ® Coreā¢ i9-9900X X-series Processor (19.25M Cache, up to 4.50 GHz) - Product Specifications
IntelĀ® Coreā¢ i9-9900X X-series Processor (19.25M Cache, up to 4.50 GHz) - Product Specifications
IntelĀ® Coreā¢ i9-9900X X-series Processor (19.25M Cache, up to 4.50 GHz) - Product Specifications
in 7 offers
The lowest price for Intel BX80673I99900X Core i9 9900X 3.5GHz 10 Core CPU right now is $733.71 at Computerspace, compared across 6 retailers.
The all-time low was $285.42 on 4 June 2026 ā today's price is 157% above the lowest ever. It has been notably cheaper before ā worth setting a price alert.
Prices last updated 1 Sept 2026.
