Question RX 6700 XT only work for "sometimes"

[Napzz]

My brother recently bought a secondhand RX 6700 XT Nitro for $150. After buying it, it worked perfectly. The next day, it wouldn't boot up again; it skipped a day and was working again. Then I moved it up to my PC, and it had the same issue. I have DDUed the driver and reinstalled the Vbios, but it is still the same. I can confirm it was a GPU problem. I was using the other GPUs and diagnosed the problem (GTX 1060 and RX 6600), which both work perfectly on my PC and my brother's PC. I was strongly suspicious that the card was ex-mining (does the 6000 series do well for mining? I've heard news that the 6000 series is bad for mining. Is there any solution for fixing it myself? I think it is not worth bringing it for repair.

 

[COLGeek]

In the systems you tried it in, did both have adequate power supplies to power the GPU?

NITRO+ AMD Radeon™ RX 6700 XT

<p style="margin-bottom: 0.0001pt;"><span style="background-color: #fbfbfb; text-align: center; color: #373737;">Up to 2622 MHz, 12GB/192 bit DDR6. 16 Gbps Effective</span></p>

www.sapphiretech.com

 

[Napzz]

In the systems you tried it in, did both have adequate power supplies to power the GPU?

NITRO+ AMD Radeon™ RX 6700 XT

<p style="margin-bottom: 0.0001pt;"><span style="background-color: #fbfbfb; text-align: center; color: #373737;">Up to 2622 MHz, 12GB/192 bit DDR6. 16 Gbps Effective</span></p>

www.sapphiretech.com

yep pc I used was a fractal design 560w platinum and my brother's one is a fractal design 750w gold
I've used Furmark in both for around half an hour, it was using around 210 w

 

[COLGeek]

Do you know (can you tell) if the thermal compound/pads are original or have been changed?

 

[Napzz]

Do you know (can you tell) if the thermal compound/pads are original or have been changed?

I think is original, it was a lot of dust on it.

 

[COLGeek]

Might be worth a shot at replacing and seeing if that solves the issue.