Mirror's Edge high CPU usage, why?

[whooleo]

I've been playing Mirror's edge recently at 1980x1080 full settings, PhysX on, 2xAA, v-sync on, and my CPU is constantly at 100% or a little bit less making the game stutter, thought it might be PhysX on the CPU but I made sure it's on the GPU and still high usage. I thought maybe v-sync might be causing issues so i disabled it and usage went down and smoothness came back, but I didn't think v-sync would increase CPU usage like that, does it? Also my GPU has never had full usage either even with v-sync and PhysX on just my CPU. So why the high usage? Is this game that brutal? Doesn't seem that it is.

 

[iam2thecrowe]

i guess the game is cpu dependant. Im not sure if it uses more than 2 cores, but upgrading to a quad core might help you.