8800 GTS 512 Underperforming?

Hey, I just bought an 8800GTS 512 and decided to benchmark it with FEAR.

I have it overclocked to 755 core and 1976 mem. To my surprise, on max settings, I only had an average FPS of 63 at 1440x900.

From what I've seen in benchmarks, that seems low to me. I had AA and AF all the way up, soft shadows on, and everything else set to max.

The rest of my system is:

- AMD Athlon 6000+ @ Stock speeds
- 2gb CORSAIR Valueselect DDR2 667
- Antec Trio 650w PSU
- GIGABYTE AM2 AMD 690G HDMI ATX AMD Motherboard
- Windows XP SP3

Some benchmarks show average FPS of ~60 at slightly higher resolutions, which doesn't worry me (I did have FF running in the background), but other ones show 150+ at max settings with same or similar resolutions. Do they have something turned off that I'm not aware of, or am I really only getting 30% of my cards performance?

The temperature remains between 51C and 60C with the fan speed @ 100% and the previously stated clock speeds. [I can deal with the fan at 100% ...it's nothing compared to the noise my X1950XT made.]

I'm downloading 3dmark 06 to test my score on there and see how it relates. I'll report back. Any information regarding my problem, however, will be very helpful.

edit: I also have the latest drivers off NVIDIA's website and I removed the ATI ones.

I'm pretty FEAR only goes up to 4xAA.

Yea, they probably have vsync turned off. With it on you are limited to your monitors refresh rate which ~60 is typical.