Next upgrade. Advice needed.

[pmr]

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.

 

[Maxiius]

drop another gig of ram into it

 

[pmr]

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 )

 

[Maxiius]

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!*

 

[pmr]

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