Be sure to have "software mouse" disabled in game options. If your mouse is still jumpy, lower your game settings to get higher fps. If you saw my videos posted above, they are all done with mouse (sensitivity set to high).
I recorded few attempts. Bugged games - ended too early http://youtu.be/yXwuSWOQox4 http://youtu.be/Jv61y_uPkOM 2600 score games http://youtu.be/0ANhLvezFIY http://youtu.be/rDsHimJ0ur8 http://youtu.be/RN2osi0uhu4 and one 2500 score game http://youtu.be/ZYTvpKyz-gE
I can confirm this, I observed exactly same behavior. I can manage to do 2600 almost every time, but I get epic particle very rarely. Almost always I get white one.
OP is panicing for no reason. I run my card at 85-90C for last two years and it works just fine. When it hits 95 clocking frequency drops, to reduce heat, but that rarely happens. I'll repeat what people said. You can't burn your card, first it will reduce clock, then it will shutdown before any damage can be done. (ye,…