I've been running the console client (so cpu only) for a long time. I just got a new video card. It's an ATI Gigabyte Radeon HD 4850 with 1 GB of memory (GV-R485MC-1GH). It's the model with a big heatsink but no fan. I decided to give a try to the GPU2 client as I thought that it might be faster than the console client. After running for 5 minutes, I went into the Calatyst Control Center to take a look at the reported temperature and it read 108°C. I stopped the client and after a few minutes, the temperature was down to around 70°C. That seems way too hot. It seems like a bad design if the heatsink of the card can't cope with running the card at full power. So, how hot is too hot? I might run the GPU2 client but lower its speed to bring down the max temperature. I would not want my new card to die too fast. I'll also try some games and take a look at the max temperature caused by those games.