I just upgraded the other day from a gtx260 to a gtx570 @ 950mhz and it made a world of difference.
Was getting fps in the high 40's on medium settings on the gtx260 and the game felt very laggy and was kinda hard to track onto people quickly.
Now with gtx570, All ULTRA settings, 4x AA-Medium, 16x AF, no motion blur, 1280x960 @ 120hz on my CRT I'm averaging around 95 fps, running at this lower resolution really helps, the gtx570 is around 90% usage, if I run 1600x1200 it's pegged at 100% usage and fps is much lower. That's the nice thing with CRT's they still look great at lower rez with higher refresh.
ULTRA:
65-85 fps outside
100-150 fps inside
It's very smooth and super easy to get kills now, I feel like I have the jump on everyone.
The Class I'm using...
Assault
UMP-45 w/ Red Dot
MP-443 w/ Tactical
Flak Vest or Squad Sprint
Here's last nights games. My play style is rambo, I like to take mcoms...
20-8
34-19
20-10
66-33 ->9974pts
I've never seen anyone break 10k, was super close 
57-28
39-14
25-12
18-2
Was getting fps in the high 40's on medium settings on the gtx260 and the game felt very laggy and was kinda hard to track onto people quickly.
Now with gtx570, All ULTRA settings, 4x AA-Medium, 16x AF, no motion blur, 1280x960 @ 120hz on my CRT I'm averaging around 95 fps, running at this lower resolution really helps, the gtx570 is around 90% usage, if I run 1600x1200 it's pegged at 100% usage and fps is much lower. That's the nice thing with CRT's they still look great at lower rez with higher refresh.
ULTRA:
65-85 fps outside
100-150 fps inside
It's very smooth and super easy to get kills now, I feel like I have the jump on everyone.
The Class I'm using...
Assault
UMP-45 w/ Red Dot
MP-443 w/ Tactical
Flak Vest or Squad Sprint
Here's last nights games. My play style is rambo, I like to take mcoms...
20-8
34-19
20-10
66-33 ->9974pts
57-28
39-14
25-12
18-2