Question Pc boots up and works initially after gpu repaste and change thermal pads, tried to restart, pc doesn't boot up anymore

[nvsamson]

Hi! I got a second hand 3080 Gundam ROG, not used in mining, some corrosion in the fins. Seller repasted it March 2023, thermal pads wasn't changed. I was able to use it for 2+ weeks without any problems, temps around 81⁰C max on max cyberpunk game settings stable 55+fps, then I decided to check HWINFO, saw that the hot spot is around 105-108⁰C. Decided to take it to a tech to repaste gpu and change thermal pads. (For my peace of mind since it's a second hand unit). Tech used cryonaut (original, I checked) for gpu die, Deep cool for the pads with correct thickness. Tested it, furmark for about 5 mins, no problem. Max temp at 69⁰C. Upon going home played with cyberpunk again for about 4 hours max temp 74⁰C, hotspot around 85⁰C, no prob. Tweaked with undervolting. 0.7V on idle, 0.9+V while playing, no problem. Clicked on the windows logo on afterburner then restarted my pc. Then no post, error light stayed white on VGA. Then pc restarts.



Trouble shoot done: reseat all RAM, remove cmos battery, shorted for cmos reset also, cold boot (press power button 30 secs while psu off and unplugged), boot up with 1, 2, 4 RAMs, switched RAM places



Upon some reading online, it might have been the afterburner, so I borrowed a working 1660 super, pc boots, uninstalled the afterburner. But upon putting my 3080, same problem. No post, light on VGA. Tested gpu on another unit, same prob (no display), technician said it's already code AA meaning it should have display already but none. Will bring in to the tech again tom to open the gpu he repasted. (He's on a day off today, others doesn't want to open it)



What might be the prob? 😭😭



Here's a link to the video

VID_20230905_212637.mp4

drive.google.com

Specs:

MSI B660 TOMAHAWK WIFI

32GB (8X4) Corsair Vengeance RGB RT

i5-12400F

3080 Rog Gundam (10gb)

750W MSI MPG A750GF

 

[Aeacus]

What might be the prob? 😭😭

Simple, dead GPU.
You already tested the GPU in 2nd PC with exact same results.

Also, it is doubtful it can be repaired. So, sell it as "spare parts" or keep it as paperweight. Also, look towards new GPU as well. Your call if you get another 2nd hand GPU and can use it for few days/weeks/months or get brand new GPU that has no worries for years.

Personally, i'd buy new GPU since i'm not rich enough to buy used hardware.

 

[nvsamson]

Simple, dead GPU.
You already tested the GPU in 2nd PC with exact same results.

Also, it is doubtful it can be repaired. So, sell it as "spare parts" or keep it as paperweight. Also, look towards new GPU as well. Your call if you get another 2nd hand GPU and can use it for few days/weeks/months or get brand new GPU that has no worries for years.

Personally, i'd buy new GPU since i'm not rich enough to buy used hardware.

Did my undervolting damage the gpu? It was fine until I saved the profile on afterburner and restarted the PC.

 

[nvsamson]

Did my undervolting damage the gpu? It was fine until I saved the profile on afterburner and restarted the PC.

Or was it something the technician might have done.

 

[Aeacus]

Did my undervolting damage the gpu? It was fine until I saved the profile on afterburner and restarted the PC.

Or was it something the technician might have done.

Since you bought used GPU, it could've very well be that the GPU itself was so far gone that it eventually failed.

You say that the GPU wasn't used in mining, yet it had corrosion on the heatsink? Well, running the GPU 24/7, mining or not, will accelerate the corrosion on the heatsink, especially when GPU is located in humid environment and is completely neglected.

Here's another thought; why the RTX 3080 was sold in the first place?
It is still good GPU, even at current date. On par with Radeon RX 6900 XT and RTX 4070. On top of that, it is also a rare edition of RTX 3080 (being Gundam Edition).

It was fine until I saved the profile on afterburner and restarted the PC.

Did you benchmark the GPU (e.g Unigine Superposition) after voltage change, to make sure that GPU is stable? If not, then you can not say that the GPU was stable after undervoltage.

 

[nvsamson]

Since you bought used GPU, it could've very well be that the GPU itself was so far gone that it eventually failed.

You say that the GPU wasn't used in mining, yet it had corrosion on the heatsink? Well, running the GPU 24/7, mining or not, will accelerate the corrosion on the heatsink, especially when GPU is located in humid environment and is completely neglected.

Here's another thought; why the RTX 3080 was sold in the first place?
It is still good GPU, even at current date. On par with Radeon RX 6900 XT and RTX 4070. On top of that, it is also a rare edition of RTX 3080 (being Gundam Edition).


Did you benchmark the GPU (e.g Unigine Superposition) after voltage change, to make sure that GPU is stable? If not, then you can not say that the GPU was stable after undervoltage.

I brought it back to the tech. When it was on q mode, it doesn't work but when we put it to p mode it worked at first no problem. But after restarting, same thing happened maybe something is shorted inside the unit. Now, still no display but with power, vga error on mobo, after sometime, power will cut off to the gpu. So most prob dead gpu.

Seller said that he upgraded to 4080, and i know that seller lives in a humid area since almost all places in the Philippines are humid.

I didn't benchmark using uningine but I used furmark for around 5 mins and played cyberpunk on max for around 4 hours after the undervolting.

Thanks anyways. I already accepted that gpu is dead. 😢