This is a somewhat complicated issue. I currently have a 1660 super that suddenly stopped working. The moment I began to play anything that was graphically demanding, the screen would suddenly shut off and I could hear all of my fans going full blast. Each time this happened, I would monitor the temperatures using HWmonitor but could not see any overheating whatsoever. I tried reapplying thermal paste, just in case, but nothing fixed the issue so I decided to purchase a new gpu and found an rx6650 XT that a guy was selling over the internet. I installed the gpu and started playing Subnautica, but didn't notice any issues. I then tried to play Way of the Hunter, all while monitoring temps with HWmonitor, and I very quickly noticed that the gpu was overheating. The guy I purchased it from had purchased a new card, so I assumed that perhaps he had never applied any new thermal paste, so I took apart the 6650 and applied some paste, but I noticed what appeared to be corrosion on the copper piping and slight discoloration with the heatsink. (I've attached a picture). I contacted the seller and he was generous enough to offer me a refund on my purchase, which was a huge relief because buying from a private person online is essentially "buyer beware", but this guy is legit a good person. After he took it back and refunded me, he later sent me a message insisting that there is no corrosion and that is simply the natural coloring of the piping. I just thought it appeared corroded because I saw nothing similar in my other gpu (the 1660 super). I suppose that what I am seeing could be the soldering to attach the piping to the heatsink? I have no idea so I hope someone can tell me what I am seeing. If I am mistaken and there truly is no corrosion, then it makes me worried that there may be something else wrong with my motherboard, the pci slot, or something else. Any help is greatly appreciated.
View: https://imgur.com/a/SytDQl8