I wanna upgrade my GTX 970 to something more powerful and I've been looking into the used market of Pascal cards.
Before someone asks, yes, I know that the 30XX gen is gonna come out in like september, but rn would just be very convenient for me to upgrade, since the Radeon HD 6870 in my second rig (back home at my parents' place) has finally given up the ghost but I wanna do at least a bit of gaming when I'm back home during the uni break in summer.
In the Netherlands (where I live), GTX 1080 ti's seem to be easy to get your hands on, however there is a lot of scammers on marktplaats (kinda like craigslist or kijiji for you Canadians out there).
So I found a dude (let's call him William) who's willing to sell me a 1080ti for cheap, we text back and forth, I ask the usual stuff like Have you ever overclocked it? ; Has it been used for mining? and Do you still have the receipt/warranty?. Turns out, apparently (and I'm inclined to believe him, he sent me some videos) his uncle is this rich tech guy who has like a whole mining operation and stuff. Said uncle gave him five (!) 1080ti's that he (the uncle) bought but then allegedly ended up not needing, so he gave them to his nephew who wanted to game. Makes sense I guess. William of course doesn't have a receipt or an original box or anything.
William did however agree on coming to my place to let me test the card(s) in my own personal rig (why not his place? idk, I think he only has five 1080ti's, not the rest of the rig). He also came across like a reasonably trustworthy guy. Poor dude just doesn't know what to do with five graphics cards.
Now my worry is that the graphics cards have actually been used for mining and the uncle simply didn't tell William (or he lied to me, but let's believe in the good in people for now).
From the pictures it looks like the fans/heatsink on the cards (MSI 1080ti Gaming X) are actually unused. However, even if they are, uncle could have just used an aftermarket cooler and put the original heatsink back on.
Is there a sure-fire way for me to tell whether that's the case? Or to see immediately that it's unused? I was thinking look at the PCB to see colouration, cuz I've heard that the heat from mining can cause those. Or looking at the screws of the fan etc.
I have attached the picture he sent me. They do look new, but they might have been cleaned...
Or do I just have to hope that he's not trying to get me to buy a card used for mining?
Mind you, I am no expert on this stuff. I can build my own PC no problem, but I've never changed a GPU cooler before...
TLDR: Guy trying to sell me a GTX 1080 ti without original box or receipt, he says it's new, I'm afraid it was used for mining (maybe with an aftermarket (water-)cooler) and cleaned up.
How can I tell?
Thanks a lot in advance, sorry for the wall of text.
Picture in spoiler.