This thread is a little stale, found it from a google search.
The answer is yes, with suitably powerful Crossfire or SLI GPUs in full 64 player maps and at low detail settings, the 2500k will be bottlenecked.
To wit: In the above mentioned scenarios my dual 6870s are running 75-80% apiece...
Just to reiterate.. My old system (Q6600 @ 3.2) was fine on Metro, but 64 player caspian border brought it to its knees.
32 player servers might not bottleneck a S775 Quad, but be ready for 64 player servers to.
My $0.02
I had a Q6600 @ 3.2 with 6GB RAM and a single 6870. Metro ran more or less like a dream, averaged aorund 60fps. As soon as I got into a 64 player Caspian Border map, however, I knew I'd need to upgrade. I was often dipping as low as 25fps which put me at a huge disadvantage.
I'm...