Not sure why your cards are running so hot.
Single fan VS Double fan ?
no mine are double fan as well, not sure what you guys are mining but xcn make the gpu run very hot, also there are only 2 cm of space between them
Nope. Mining XCN as well - 50/60C is hardly a hot GPU
- The 2 cm is your issue and why your card burnt! Heat is accumulating excessively and the GPU fans are only making things worse because they are sucking the heat from its closest neighbour and blowing it back into the GPU. 86C for this card is way too much and you are looking for trouble again. You should at least blow a fan in there to dissipate heat. The issue is not the coin but your arrangement. There should at least be a 3 inch space between each card for proper ventilation.
was 86 because the fan stayed at 33%, i forgot to set "auto" on msi aft, otherwise i'm at 67 with 46% fan
i would say the 2cm is the issue, i have over 5cm between my cards, and here are my temps from no card infront, to 2 cards infront
40'c
45'c
55'c
no it was the 33% fan speed, trust me, now i'm at 67° with 46%, try to lower your at 33% and you will see
those 750ti don't need a lot of space, they need just 60w at best, they are not a monsters gpu like 280x-290