6800gto replace or memory

[Dellitup]

High i got a dell 8400 and trying to play source. My fps is all over the place, never can stay stable always like 40s. So i was wondering if i should get a 7800gtx or buy another gig of memory. I was also thinking of ing a ASUS P5ND2-SLI Deluxe Socket T (LGA 775) Nvidia nForce 4 SLI ATX Intel Motherboard along with a Thermaltake Tsunami VA3000BWA Black Aluminum ATX Mid Tower Computer Case. And upgrade the video card later with duel 7800gt or one gtx. I pretty sure the memory and Processor will work with the motherboard.
I just need help what would be better for gaming in the long run.

3.4 Processor (lga 775)
1gig of pc2 4200 ddr2 at(533) 240 pin
160 hard drive
soundblaster live 24bit
6800gto

 

[HolyGerbil]

Call dell tech support XD

It sounds like the system should run most games pretty well

edit: Spelling

 

[ryanv12]

does your frames being all over the place make a noticeable difference when playing? or was it from what you recorded with a program like FRAPS? Your system should be running any game out there well.