Based on Tom's Hardware and my friend's computer, there is something very wrong with my computer. The game is BF1942.
Tom's Hardware
Here's my computer:
Athlon 3200+
Radeon 9600XT
~80 FPS @ 1024x768 (regardless of AA, AF, or in-game quality)
Here's my friend's computer:
Athlon 2500+
GeForce4 Ti 4400
~100 FPS @ 1024x768 at highest in-game quality with no AA or AF
Tom's computer (1)
3.2GHz Pentium 4
Radeon 9600XT
~148.5 FPS @ 1024x768
Tom's computer (2)
3.2GHz Pentium 4
GeForce4 Ti 4400
103.4 FPS @ 1024x768
I understand that it's not exactly accurate to compare my own tests to Tom's Hardware tests, but comparing my computer and my friend's computer is accurate.
My computer is also slow when running Neverwinter Nights. I had my GeForce2 Ti200 in my computer yesterday for some benchmarking purposes, and my GF2 was able to get about the same frame rate as my 9600XT.
I formatted my hard drive two days ago so there isn't any spyware or garbage on my computer. I have the proper sound drivers, motherboard drivers, video drivers, and NIC drivers.
My computer even beats my friend's computer in GL Excess (Open GL benchmark). My computer scores 9274, my friend's scores about 6800. The GF2 i was using scored 5640.
What could be wrong?