I have an EVGA 8800 GTS 640 MB, and have the HR-03 installed with the ram heatsinks stuck on with Arctic Alumina. I let ATItool run to find my max memory clock and at around 1000 MHz, I went and stuck my finger on the little heatsinks under the heat pipe. It seemed way too hot, but I've never done this before. Also I read of people pushing their memory clock rates to about twice that. I'm afraid that if I keep going till I see artifacts I'm going to fry it. Should I get some kind of thermometer and stop when the ram gets to a certain temp, or am I worried about nothing?

we talking 60c, 70c, 80c, 130c?

I dunno, I don't have a ram temp sensor, I don't think. Nothing in Rivatuner was reporting the level of heat I was feeling on my ram. It was certainly hotter than the heat pipes when the GPU was at 60 degrees.

just put on atitool 3d view then monitor your gpu temps. Personally I have 8800 GTX idle at 70c. I don't really care cause I don't lose any performance. Don't worry too much about temps these cards handle high 80s fine.

Unless its so hot you cant keep your finger on it for 10seconds then its ok.