38 fps on stock 2500K may not be right, but the important thing to take from that graph is that FPS in multi-player BF3 can be very cpu-dependent.
However I very much doubt that the issue here is the power of the CPU, if it's OC'd to 4.43 that should keep up pretty nicely with a 3570 ... although if it's well OC'd the 3570 could probably be expected to be, I dunno, 25-30% faster
Don't forget you're comparing two machines, presumably in two different places, with different internet connections, AND you're using a multi-player game ... Plus you may not have 100% the same in-game IQ settings. Plus, since there's no actual benchmarking involved here, 50% fps difference is just an estimate, right?
Basically there's way too many variables involved here to nail down why the performance is different with yours vs your buddy's machine. But it's logical to think the CPU is likely involved in this particular case, since benches show that BF3 multi-player is very sensitive to CPU power.
BTW, I moved this thread to graphics cards because this is NOT a Build Log (which is the section this thread was in before). And I renamed it, in case you're wondering why it's different. The old title was too provocative in terms of starting flame-wars Edited by brettjv - 8/27/12 at 10:50am