GPU upgrade advice needed pls

[singstotrees]

Hi Guys,

Thought it was about time i updated my gaming rig, not that i get much chance to play anything these days.

Here is what i have -

Case - Antec 900
PSU - Coolermaster 650
M/B - ASUS P5N32-SLI PREMIUM
CPU - Q6600 2.4
GPU - 8800GTX
RAM - 2gig DDR2 PC2-6400 (399mhz)

I have an extremely limited budget and so can't afford to upgrade everything in one go, therefore i thought i'd start with the graphics card. My question is will replacing the 8800GTX with something like an HD4890 - http://www.overclockers.co.uk/showproduct.php?prodid=GX-101-PC&tool=3 give me a significant boost in gaming performance over what i have? for overall visuals and framerates.

I'll then probably upgrade the RAM to something better than the old cheap generic stuff i have, so any suggestions on an upgrade for the RAM would be highly appreciated. I'll be looking for 4 gig for when i upgrade to vista 64.


Many thanks for any help, it's appreciated.

 

[singstotrees]

Thanks guys. The missus won't let me have the money til the end of the month anyway, which works out well if the prices are gonna drop. Thanks for the info!