yep FF, particularly spam is _definitely_ cpu limited. eg if you have a 2ghz AMD/3ghz P4 you _will_ get only half the fps in spam/action compared to someone with a 3ghz C2D, if you both have same video card (say 7900gt or above and lowish graphics settings as applicable)
the video card will determine the general environment FPS - and thats where graphics settings will play a role to some extent.
below i test i did with my timedemo as in this thread:
http://www.ozfortress.com/showthread.php?t=24116
ive got a 8800gts which is a tad overkill compared for need for as much CPU mhz as you can get. which is evident in the almost linear increase in FPS as CPU speed rises.
Quote:
ok just tested CPU speed impact on FPS.
(i have ragdoll and overlay options on, rest as per config). 1280, 4xAA, trilinear.
2.66ghz - 79FPS
3.20ghz - 94FPS
20% increase in cpu speed resulted in a 19% increase in FPS. very CPU dependant (all the spam and FF aspects over normal HL2 are presumably done in code that runs on CPU only, hence high dependance).
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