8800gts on aging hardware

I'm going to upgrade my rig, and I was thinking about getting the gpu first.

I'm switching my old 7900gt256mb with a 8800gts640mb

will I notice any big performance increase?

my current specs:

amd athlon 3800+ 64 bit single core

asrock sli mobo

2 gigs of ddr1 ram

370watt power, I'm changing to a 600w when I get the 8800gts

it will max out stalker but all the eye candy has to be stopped at 1600 above res.

at 1024 and 1280 , it will run smooth or just stick to your 7900.

newer games run on dx 9 too.

wait for 9800 but then ur entire setup will bottleneck the performance so its better u get a 8800 gts on ur current setup.

or else save and upgrade later this year