Any suggestions what I can do next to try fix my gpu?
-After code 43 happened, pc will boot 1 out of 3 boots. I don't know if it's like a placebo but whenever it doesn't boot (PC fans running but there's no display, and keyboard and mouse LED is not lighting), I'll let it rest for a minute then it will boot properly.
CPU: Ryzen 3 3300x
MOBO: Gigabyte B450M DS3H
GPU: Sapphire Nitro+ RX 470 (2nd hand, only using it for almost a month) (didn't know it had a modified bios)
RAM: HyperX 2x8gb 2666 MHz
PSU: Gigabyte P550B
I'm playing apex legends for around 10 minutes then pc suddenly crashed. After pc restarted, radeon drivers won't load and when I went to dxdiag, it says "There is a problem with Radeon (TM) RX 470 Graphics device. For more information, search for 'graphics device driver error code 43' "
What I've tried in chronological order:
-DDU then install latest driver (didn't work)
-DDU then install old (2019, 2020) driver (didn't work)
-Installed latest driver back
-Reflash to stock bios (screenshot attached below) (it worked but after playing apex for around 10 mins, it crashed again and it says code 43 again)
-Reflash to previous bios (modified bios)
--Btw, i don't have gpu-z screenshot of the modified bios of the gpu but here's the difference of it from the stock bios as I remember. BIOS Version - 015.050.000.001.000000. Default Clock 1206 MHz, Memory 1750 MHz.
-Reflash to stock bios then pixel patch (didn't work)
-Tried gpu on another pc (still code 43)
I can still use my pc for twitch, discord, ms office. Gaming is the only thing I've tried that my pc can't do.