Well, I ran into a problem with two of my Chili's. I installed ARCTIC Accelero Twin Turbo II units on all the boards but two of them dropped down to 22Gh/s at 67C.
One of the two was in service for weeks before the problem and the other ran fine for two days before it happened.
I used "Fujipoly Ultra Extreme System Builder Thermal Pad - Full Sheet - 200 x 150 x 0.5 - Thermal Conductivity 17.0 W/mK" and the Arctic back plate to prevent flexing.
Should I try using the Arctic paste on these two instead?
-BrimStone
Just a heads up, when I used the EVOs on mine, a couple of them would go to 18-22GH. All I did was unscrew and redo the heatsink and if the Fujipoly pad was too damaged, replaced that. It always fixed the issue, it seems that they can be really sensitive at some points.