My impression is that the heat problem with a laptop is not the same problem with an iMac but I would not rule it out. It only freezes when your playing WoW?
Do a google search on "imac freezes when playing wow". I came up with
this.
TX Huntn, I' thought I'd give macrumors a try in figuring this one out. I did give google search a try , but the posts or threads seem to be a year or two old.
But, that thread you linked me to did have a guy on there that seems to have the same problem as me.
Quote
"I have been having the freezing problem after extended play as well.
I'm running os 10.5.3 on a 2.8 ghz Intel Core Duo with 4g ram
Video card is ATI,RadeonHD2600
The only application where I have experience this is wow.
It locks the whole computer. Sometimes, the sound continues. If running in windowed mode, I cannot click out of the wow application (most times the mouse is dead... recently I could get the mouse off of the window, but clicking on the desktop did not get the finder to allow force quit.)"
No one replied to him with a solution.
Could this be a Video card issue? Or, is my iMac a lemon?