Diagnosis help, psu gpu

Ouikikazz · December 25, 2020

To preface I've built many a computers in the past never ever had this much bad luck in a build but I also took a break from building PCs and was instead wrenching in the garage. In any case my first build in over 3 years and here's the specs

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Ryzen 5600x (stealth cooler trashed used a prism cooler for rgb so cooling should be slightly better)

Asus b550m tuf

Gskill ripjaws 16gb x 2 pc3600

Asus rx6800 ref

Seasonic 750w gold psu

Wd black 750 m.2 500gb nvme

Attached to a acer x34 1440p monitor (shouldn't matter here)

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I have plenty of ventilation and not much heat output for this to happen, side panel of case is open fans are spinning.

Now onto the issue, my first mobo was doa wouldn't post tried everything wouldn't go, this new one needed a bios update out the box had to get my friends zen1 cpu just to update bios but no biggie.

Fast forward today went to run some gpu benchmarks and games to see what the fuss is about. Game crashes a few time started looking at drivers, no issues all fresh install software and drivers but I did a ddu anyways and reinstalled AMD drivers and monitor drivers. Then went to run blender benchmark, no issues. Cinebench cpu bench no issues. Ran furmark at 1024 windowed and the bench ran for a few then crashed, when I say crash the computer rebooted no errors no bsod no warning just click noise from psu and reboot. Ok run it again figured bad resolution tried it at 1440p, 1080p standard custom all settings and the bench does it almost instantly once the eye pops to screen it flickers black and starts a reboot again. Now I go and decrease the clock of the ram to non oc profile as well as underclocking what it's rated for to 3200 and still same thing. I reset the cmos by pulling battery a few times because sometimes when it reboots it throws the motherboard into a loop trying to post. Tried test again with only one ram stick trying both sticks separately, no change. Figure ok maybe bad software try unigine heaven benchmark, same ordeal once the bench starts it instantly reboots. Right now I'm leaning on gpu or psu being bad or not enough psu power? I triple checked every connection and reseated the vid card and ram multiple times. Temps are normal for cpu and gpu since it can't even ramp up to get hot. I have no errors in windows event viewer since it didn't crash the software but tripped something hardware wise and rebooted so no crash logs.

Where do I go from here? RMA both the gpu and psu? Any chance the mobo pcie slot bad too causing this? Any other settings to try? I figure if it's a bad psu it wouldn't turn on at all but since it works maybe the gpu calling for too much power? But the card doesn't even get a chance to ramp up so I'm leaning more towards something bad on the vid card? I don't have any other psu to try and no other vid card to try at the moment would need a few days after the holiday to ask friends to borrow parts but what else can I try and do? I could try and do a fresh windows and software install but I really don't see that helping since I get no errors or bsods or conflicts software wise because the psu just click off then on like a surge.