Question PC Freezing with artifacts - Please Help

[suavsneaky]

Hi guys, short story, i bought a second hand gpu (8192MB ATI Radeon RX 470 Graphics (XFX Pine Group) 2 weeks ago and i started having this problem where my screen would freeze in games or when i alt tab, the weird thing its that when i do benchmark test (Valley) doesn t crash, it working, but as soon as i enter a game it freezes. I took a video here https://vimeo.com/user115137072/review/416863556/f324210ee4 and a print screen here http://prntscr.com/se3qw0

Also, if you can see, on the right corner of the software my card memory jumps in 1 sec from 300 to 1800mhz then crashes. I want to say that i didn t overclocked the gpu at all. I even underclocked it. I dont have problems with overheating, i have monitored my other components.

I asked my friends and they say maybe could be my motherboard not letting my gpu to "extend" his power, mine being from 2011 with the latest bios update.

What i did:

1. tried every amd driver
2. ddu
3. power options
4. new psu
5. disk check and sfc scannow

---------------------------------------------------------
My specs:
Operating System
Windows 10 Pro 64-bit
CPU
Intel Core @ 3.10GHz
Sandy Bridge 32nm Technology
RAM
8.00GB
Motherboard
ASUSTeK COMPUTER INC. P8H61-M LX2 (LGA1155)
%1 Chipset
Graphics
C24F390 (1920x1080@60Hz)
8192MB ATI Radeon RX 470 Graphics (XFX Pine Group)
PSU
450 W ATX DELUXE

 

[Grobe]

your video link doesn't work

[Edit]
Never mind. I'm pretty sure the GPU itself are faulty. Have it being used for crypto mining maybe?

 

[suavsneaky]

your video link doesn't work

[Edit]
Never mind. I'm pretty sure the GPU itself are faulty. Have it being used for crypto mining maybe?

Thank you for your response.
Nope, i did not used for mining, just for games, but i couldn't play properly a game due to freezes. I will call monday to return it. If anybody has an idea im open. Maybe it was used to mine, who knows, i took it from a known website, not a scam or low rep site. I have 60 days guarantee but i dont know if i sould return it or to use that guarantee.