Help choose a GPU for a 939 system!

[deadbeat119]

Hi,
I've had an AMD 939 system for a long time. I recently upgraded my CPU from amd64 3200+ to amd64 4000+ (single core)(also so I could build a PC for someone out of spare parts). Next to the 4000+ CPU I also have 2 gigs of DDR400 ram and a really lame XFX 8600GTS that I got from XFX as an RMA replacement for a broken 7900GT (R.I.P.). The 8600GTS is has noticeably worse performance, especially in TF2, and I think I need something else.

Also, SLI doesn't seem like a good option because even 8600GTS SLI gives only marginal performance increases. So what I'd like are recommendations on what GPU would go along nicely with my CPU, so neither is bottlenecking the other.
Some games I play are: TF2, CoD4, BF2142. With a better GPU I might also like to play a game like GRID..

EDIT: my optimal resolution is 1280x1024. I never play on any other.

EDIT2: Parallel Question:

Since I have 2 motherboards, http://www.uabit.com/index.php?option=com_content&task=view&id=32&Itemid=48&page=1&model=284] I currently use and http://www.newegg.com/product/product.aspx?Item=N82E16813131524R that's been collecting dust, would I benefit from switching to the A8N-SLI? Maybe I could do some air-cooled OC'ing on my amd64 4000+? The HST I have is this: http://www.newegg.com/Product/Product.aspx?Item=N82E16835186010".

 

[gamecrazychris]

You should look at this, its an 8800GT and it costs only $130 with mail in rebate.

http://www.newegg.com/Product/Product.aspx?Item=N82E16814121224

 

[geotech]

I have a X2 3800+ @ 2.35GHz, 2GB ram and a 520W psu. I'm using a 3850 and it works beautifully. I go Crysis medium at 40fps. All the valve games, TF2, CSs and whatnot are easily all over 60fps on the more demanding maps. I'm running 2 19" Wide LCDs @ 2880x900.

Great buy, consider picking up a 4850.
(My last card was a 7600gt)

 

[vochtige]

that 4000+ is single core? and would the 3850 or 4850 don't be bottlenecked by limited cpu? i'm also looking for replacement for my 8600GT (to milk my system just that little bit more)

 

[pcgamer12]

+1 XFX 8800GT 512MB

 

[deadbeat119]

That 8800GT deal is insane, gamecrazychris! Though, I wasn't clear enough, my amd64 4000+ cpu is single core. How does the bottlenecking effect stack up now?

 

[Photron]

You might seriously consider A. looking on Tom's CPU charts to see how you stand/w preformance...only a suggestion, but the Athlon 64x2 3800 comes in a 939, as does the
Athlon 64x2 4800, although the 4800 is about
$205.00 right now...it does fairly well on Tom's chart...There is another option for
about $180.00...the Athlon Opteron 180(939)
has pretty good spects, but is not on Tom's chart, as they consider it to be a server
processor.
Once again, only a suggestion...the non-esential extra parts could be sold on E-bay
in order to(help) finance the new CPU...
once you go 8800, your going to bottleneck
most any CPU thats less than 2.8 ghs, but the worst part is the single core...just for the record, I'm on an E-machine(939)and it sucks
but I do have to live in the reality of my currant finances...