Question Black Screen of Death after weeks of debugging

[Julesm2]

Hi all,
My PC which I built in 2018 has started developing issues in the last 2 months. I have been scouring forums for solutions but I feel like I have tried everything now. The behaviour is a sort of distinctive so I'm hoping someone here has an idea of what might be going on.
Here are my hardware details:

Case: dancase a4
PSU: corsair sf600
MOBO: ASUS ROG STRIX X470-I
CPU: RYZEN 2700x
GPU: gtx 1080ti (initially) RTX a5000 (current)
RAM: corsair vengeance 32gb (2x16gb)
HDD: 1x Samsung evo pro m.2 500gb 1x samsung evo pro m.2 1tb
I should also mention that my calculated maximum load is 425 watts, my PSU is 600w.

Around 2 months ago, I started getting blue screen of death while working on a 3dsmax scene. I thought it was maybe software specific but I found the issue occurred also in Cinema 4D. The error codes were different each time, and some times they would disappear before I could even read them. I thought it might be a GPU issue so decided it was a good time to upgrade from 1080ti to rtx a5000. The issue persisted so I think I can rule out the GPU as the culprit.
I then ran the following checks:

Memtest86 (each stick separately) - PASS
Furmark - PASS
Prime 95 - PASS

I then updated the BIOS,
tried about 5 different GPU drivers, among many other drivers.
I followed so many debugging suggestions that I actually cant remember them all.
Somewhere along the line the problem went away, however, now I'm getting BLACK screen of death when doing certain tasks.
Using redshift in c4d (GPU engine) causes an instant black screen.
Using corona in 3dsmax causes an instant black screen.
Booting with 2 monitors connected instead of one causes a black screen before reaching the login screen.
Once again, Furmark passes, prime95 passes.
I'm at my wits end now, it seems like it must be some kind of corrupted driver or something but I just don't know how to identify the issue.
By black screen, I mean the screen goes black but fans stay running until I hold down the off button. The audio drops as well and I cannot access the PC using teamviewer. I have tried multiple monitors and the issue is consistent.
Does anyone have an idea of what might be going on here?

 

[Colif]

The most irritating thing about the crash is that it comes and goes. It may take weeks to know it's gone for good

story of my life here. Answer posts, think its fixed just for the person to return a month or so later and say, its happening again. Sometimes I just want to say, No... I fixed you already... but clearly I hadn't. Some times its just not obvious what cause is. Windows may not know, if its hardware. It can't tell. Windows has no direct contact with PSU so it can't tell what its doing.

if its the PSU,

I should also mention that my calculated maximum load is 425 watts, my PSU is 600w.

it appears its just random. I hope it is PSU as I have said that before, just to have problems not solved... just a few days ago infact.

As for how big, that depends on what your next PC will be. I would go for the larger to give wiggle room, indications are GPU will keep wanting more power.

Event ID: 11
from what i can tell, if the black screen were caused by the nvme, it would happen after a freeze and a restart, not while pc is still running - link
Just trying to cover all possibilities.

 

[Julesm2]

story of my life here. Answer posts, think its fixed just for the person to return a month or so later and say, its happening again. Sometimes I just want to say, No... I fixed you already... but clearly I hadn't. Some times its just not obvious what cause is. Windows may not know, if its hardware. It can't tell.

if its the PSU,

it appears its just random. I hope it is PSU as I have said that before, just to have problems not solved... just a few days ago infact.

As for how big, that depends on what your next PC will be. I would go for the larger to give wiggle room, indications are GPU will keep wanting more power.

Event ID: 11
from what i can tell, if the black screen were caused by the nvme, it would happen after a freeze and a restart, not while pc is still running - link
Just trying to cover all possibilities.

Sorry, I don't think I was clear in the last post.
I just bought a seasonic focus 850W for the new PC, I will buy a second identical PSU dedicated to the GPU's (as you say, power draw is going way up these days).
My question was only if I should replace the faulty sf600 with another sf600, or use an sf750 instead for more overhead?

 

[Colif]

I don't think power draw was problem, I just think it was faulty in some way. It should be able to run that system. So I probably get a 600.

 

[Julesm2]

I don't think power draw was problem, I just think it was faulty in some way. It should be able to run that system. So I probably get a 600.

That makes sense.
Thanks again for all of your input, its been completely invaluable to me!

 

[Colif]

let us know how you go. If you still need help, just come back

We keep trying till we work it out.