Linusislove4life

Yes. There is this white hard flaky substance on it.

So I found out what the issue was. There was a lot of corrosion on the GPU heatsink which was causing those temperatures. I assume they were ex mining cards and left in a humid garage or something. I managed to clean one of them with toothpaste and an old toothbrush and repaste it and now it reaches 78/79 degrees at a max of around 1700rpm. After looking into it, apparently the corrosion can be cleaned off and should not happen again if I use an anti corrosive spray like wd-40. My question is, if video cards were subjected to such physical conditions, which caused the heatsink to corrode how will this affect the longevity of the PCB and the GPU itself? Would it be worthwhile to return it to the seller or shall I just keep them and clean it off?

So I bought a few graphics cards second hand online and they have a lot of corrosion on the heatsink, which increased temperatures and caused the card to thermal throttle greatly. After looking into it, apparently the corrosion can be cleaned off and should not happen again if I use an anti corrosive spray like wd-40. My question is, if video cards were subjected to such physical conditions, which caused the heatsink to corrode how will this affect the longevity of the PCB and the GPU itself? Would it be worthwhile to return it to the seller or shall I just keep them and clean it off?

So I bought a second hand SAPPHIRE PULSE ITX RX 570 4GB GPU (I don't know if it's been mined on or even have a custom bios flashed on to it) and it has this annoying issue where the fan speeds come down very slowly.If the card undergoes load the temperature and fans stabilise at 78/79 degrees C and 3600RPM fan speed, but then as soon as the load is taken off the temperature goes down to 40 degrees C, but the fan speed is still very high. It then takes 10 minutes to drop down to 35 degrees C and 3000 RPM on the fans. ...and probably most annoying of all the GPU seems to jump from 0 rpm straight to to a high rpm when the temperature fluctuates between two discrete temperature values.From a fresh boot and no load on the GPU the fan speeds are very low.In the past, other cards that I've used have their fan speeds and temps drop at the same rate, but not this one for some reason.