p4c 2.8Ghz @ 3.2Ghz (1.55V bios limit)
MSI 648 F Neo/ SIS648FX
Recently bought XFX 6600GT @500/1000 stock
1 Gig Buffalo DDR400 @ 364 Mhz --2x512 @ 2,5-3-3-7
Hitachi HDD 1x80, 1x160 7200rpm

I use my g5 to work, so, i can mess around with this machine. I use this mainly for gaming, and i need you advice to the next upgrade for $300 max.
Please tell me where's my botleneck and what can i upgrade (no raptors or raid). I play games such as HL2, CS, FEAR etc.

Thanks in advance.

drop another gig of ram into it

But that way i'll get my system slower (i think). the mobo only supports 1 gig max ddr400 (now running at 364 mhz because of the OC), the third slot is now auto disabled. If i get 2 or 3 gigs, it has to be ddr333. What do you think of this? (please don't answer:crappy mobo, because i know that )

hmmm daniel son, I need time to meditate upon this newly found information you have bestowed upon me.

I like the ram upgrade still though Drop that buffalo stuff and pick up some OCZ / XMS / something.

*thinkin!*

maybe its the best thing to do. To have no probs, maybe i'll drop the cpu speed to stock (makes little difference in games) and run 2 gigs of ddr333.
Thanks