1) A security marker ( the one's that are invisible unless UV light is applied) or a permanent black marker
2) mark at least 3 very small points on the item in question where it cannot be rubbed off with general handling and make a note (or photo) of the locations
this is the only way you can be absolutely sure it's your old card .... and something tangible as proof
You have a SOC card that are perilously over clocked and volted to increase performance .... so of course they run hotter...way hotter
water cooling will get rid of this issue but at high cost................So.....
Yes!, ....this will void your warranty ... But if you're not going to RMA again,...what do you have to loose!
Do this if you feel you're comfortable doing it,....or get someone that is
Disassemble and Remove Carefully the fan/heatsink assemble.....clean off thermal compound and replace with some high performance thermal compound and reassemble, .... I recommend IC-Diamond as it has proven High loading efficiency (hotter it get,the better it works) this could lower your temps anywhere between 5 and 20C
Or you could put in a detailed email and kickup a stink and try the RMA path again
Aussie Allan
Update; you gave a clue as to part of the problem with 106C after 3mins .... as a test only , ....try taking the side panel off and if you have one, put a fan blowing into the case and run the game again.......you may have a heat issue with not being able to get rid of the hot air you're generating quick enough