ASRock AMD Radeon RX 7800 XT Challenger 16GB OC GDDR6 Graphics Card

My screen occasionally flashes white.I've just started to get white lines come down the screen (this is only recent, and only lasted for 5 minutes).White / Black squares in images (swapped to onboard gpu and it goes away).Mild coil whine, when it feels like it.I've gone through two drivers the 23.9.1 and the recent 23.9.2. Used DDU, and even reformatted Windows entirely, no fix.Reseated GPU, and used all DP ports available, no fix.Surprisingly, with all that, it can actually play Starfield quite well, however, after several hours I start to get artifacts, even with temps at 65 degrees (90 degree hotspot) which is at an acceptable range.With that in mind, the performance of the 7800XT is great, until the screen artifacts ... I'd recommend looking at a ... MoreMy screen occasionally flashes white.I've just started to get white lines come down the screen (this is only recent, and only lasted for 5 minutes).White / Black squares in images (swapped to onboard gpu and it goes away).Mild coil whine, when it feels like it.I've gone through two drivers the 23.9.1 and the recent 23.9.2. Used DDU, and even reformatted Windows entirely, no fix.Reseated GPU, and used all DP ports available, no fix.Surprisingly, with all that, it can actually play Starfield quite well, however, after several hours I start to get artifacts, even with temps at 65 degrees (90 degree hotspot) which is at an acceptable range.With that in mind, the performance of the 7800XT is great, until the screen artifacts ... I'd recommend looking at a different model, or perhaps I just got a lemon.I have an Asrock Mobo that just won't die, so I'm surprised this Asrock unit is RMA.