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Same Issue With Two Different GPUs

sirR9

New Member
Joined
Jul 19, 2025
Messages
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Hello,

I'm having a very frustrating issue with my computer that has me stumped.

Initial specs:

CPU: 9800x3d
Cooler: Noctua NH-D15
Mobo: NZXT N7 B650e
RAM: G.SKILL Trident Z5 Neo 6000 2x32GB
GPU: AORUS MASTER 5090
PSU: NZXT C1200 1200W
Case: Fractal North XL
Monitors: Primary - Alienware aw3225qf (4k), Secondary - ASUS PG279Q (1440p), Tertiary - ASUS PG279Q (1440p)

I started having an issue where while playing games, all of a sudden the monitors would turn black and the GPU fans would go to max. I figured I had a GPU issue, so the 5090 is now being RMA'd.

Here's where it gets weird... I threw in my old, reliable 3080 and everything seemed fine, but then it started doing the same thing!

So I've tried purchasing new parts to test and have done the following. Tried a HX1500i PSU. Ran a Memtest86 and received 0 errors on my memory. Swapped out to a x870 ASUS TUF PLUS. The issue still persists. At this point, the only thing I haven't swapped is my storage and CPU.

I am getting a PerfCap Reason: PWR when running games. I received this on both graphics cards, but I have plenty of power and did not have this issue with the system when I ran the 3080 originally before I got the 5090.

I've ordered a new CPU... and now I'm trying different monitor cables, but I'm lost.

Any ideas?

Thanks!
 

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I started having an issue where while playing games, all of a sudden the monitors would turn black and the GPU fans would go to max. I figured I had a GPU issue, so the 5090 is now being RMA'd.

-- Memtest is not a proper software in my point of view for testing DDR5.

If it were my hardware I would check if everything was assembled correctly. I would than stable test mainboard / CPU / DRAM / NVME / PSU without the graphic card first.
Windows 11 pro was for 10 hours stable but crashed when i compiled software in the gnu userspace. (i compile libreoffice or other big packages which puts a lot of stress on DRAM / cpu - not in windows)

May I ask you to look into the DRAM stable test topics for windows first please? the screenshots seems to suggest a windows user. That stable test topic is quite common. y-cruncher and some other memtestpro or whatever they call the software.

you may also share your ryzentimings screenshot so i can check your DRAM settings.
 
Look deep in your bios settings for a memory auto tuner. Seen that completely destroy stable systems and it's usually on auto/on
 
Turn off any OC you have and memory EXPO/XMP. If it still happens, it will be a motherboard or PSU thing. If it doesn't now you know where to look.
 
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