yes,
I have both cards, the Nvidia GTS 250 1GB and the ATI 5750 1GB. I have used both of them in this system
PCIE 2.0 X16 SLOT (ATI 5750 or GTS 250)
Intle Quad Core Q8300 @2.5Ghz
4GB Ram
640GB SATA hard drive
PCIE 2.0 X16 SLOT
I have run many benchmarks, and basicly what it come down to is preference. If your into hard core physics games such as crysis, your best bet is to go with the GTS 250, because of physX. (but in truth I never realy notice the difference between the cards)
However physics are being ported and currently are part of ATI drivers. But nvida are ahead with this feature at the moment.
Crysis GPU Benchmark: @DX10 VeryHighSpec HDR 1680 x 1050 NOAA
Above system with ATI 5750: Avg 20.98 FPS Min: 18.89 FPS Max: 42.71 FPS
Above system with GTS 250: Avg 24.56 FPS Min: 14.34 FPS Max: 39.20 FPS
Some interesting benchmarks there.
The ATI 5750 also has support for DX11 witch is good for the future, Dirt 2 looks amazing!! The ATI 5750 can be overcloked much better than the GTS 250 witch is a bonus for me but may not be for others. It also has slightly higher clocks all round at default.
Both Card Specifications here:
GTS 250 http://www.nvidia.com/object/product_geforce_gts_250_us.html
ATI 5750 http://www.amd.com/us/products ... -5750-specifications.aspx
Dirt 2 benchmark: @DX11 Ultra settings 1680 x 1050 4XAA
Above system with ATI 5750: Avg 36 FPS
I didn't bother doing the GTS 250 because its not DX11 compatible and It wouldn't have been fair.
Both cards are priced the same, so there's no need to worry there. You cant go wrong and wont be disappointed with ether of the cards just take the plunge and go with one.
I personally would go with the 5750, because of higher overclocking potential and better future support + its economical compared to the GTS 250.
Sorry about the bad grammar and spelling