Most CPU intensive games

http://forums.steampowered.com/forums/showthread.php?t=824502

Here ya go.

 

Oh yeah

 

When there are lots of building interior polys visible from outside and many players in view, Tribes2 brings my otherwise 400fps or higher down to 50 or so pretty regularly. This is with a e8500, 8800gts@600MHz core, 1024x768, 2xssaa, 16xaf. I blame the game engine.

 

you are very lucky. I had a 486 DX/2 66, the turbo switch allowed to clock it down to 20MHz

 

I only had a 386sx-16

 

It at least makes use of quad cores, most games that are cpu limited are so because they are single/dual-threaded primarily.

Though I have a suspicion that GTA4 is so cpu intensive because it uses the cpus for things that shaders would normally be used for on a PC. On the consoles, which have excess FLOPs on their cpus but weak gpus, this is probably a reasonable trade off (or perhaps it works well enough so that they wouldn't even consider the problems implicit to it with regards to porting).