[SOLVED] multiple issues after going from rtx 2080 to 3080

[kilo24]

specs:
gpu: zotac rtx 3080 10gb (used for $570 on ebay. from this offer: https://www.ebay.com/itm/2849739625...LoSF5VlQDK&var=&widget_ver=artemis&media=COPY)
cpu: i9 9900k
ram: 16gb ddr4@2900mhz with xmp (anything higher with xmp causes a bsod. xmp only sets it to 2666mhz when set to "auto")
ssd: wd green
psu: unsure but it's 750w
note: ibuypower prebuilt i didnt have a choice with in 2019. came with an rtx 2080 and xmp apparently not enabled

gpu and cpu utilisation are very low according to task manager, both about 10%-15%. doom eternal (1440p dlss quality, highest settings with rtx) runs from about 90fps-150fps in the first big fight of the super gore nest level, which is an improvement over my 2080 (70?-120fps), but benchmarks online show around 144-250fps in this part. control (1440p dlss and max settings with max rtx) runs the same as before at 50-60fps with initial heavy stuttering. resident evil 2 remake (dx11 version; 1440p max settings) runs a bit worse than the 2080, even dropping into the 50's once. videos for this one show it never going below 90 and normally being well above 100. quake 2 rtx 1440p dlss quality, max settings) was 76-87fps with the demo from typing "demo -demo1" in the console, which also seems to be underperformance, if less severe than the others

sometimes (trying to boot re2 once; while downloading the 3dmark steam demo) the whole pc just shuts off. this gpu's fan is also very loud, but that seems to be normal for other owners of it

 

[kilo24]

the new cooler worked! no more power-downs, temps are down to 81.5c max, and frame rate doesnt get gimped by the cpu anymore. my ram is still pretty poor and seems to be hurting performance in a few games, but nothing drastic (outside of stutter in Control). i'll upgrade that further down the line though; the gpu, psu, and cooler combined cost me $850 usd. thank god it wasnt for nothing in the end

thanks so much for all your help, everyone

 

[Nighthawk117]

Good news, it is a toasty chip at full load unfortunately. Since you have a Z390 you could always apply a small undervolt to bring the temp down more if you felt comfortable doing that, but 80C is pretty normal.

If you upgrade RAM at a later date your best bet is for 32GB 3600Mhz.