I know your cooling is better on paper, but in reality if you did not mount it properly or are not cooling a component properly then you will get overheating with an aftermarket cooler. I told you my example of VF1000. It is better at keeping the core temps down, but it sucks at cooling the VRM so my card was causing problems and I was getting diagnostic lights turning on. This is on my 4870 XOC. You are definitely overheating somewhere, question is where...