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thanks for the advice.
I don't play many games, but the ones that I do now struggle with a Nvidia 7900.
Presumably the ATI 5750 is a fair bit faster than the 4870.Is that right?
Also, do you think it's worth getting a DX11 card rather than a DX10 one?
The 5750 is slower than the 4870, the 5770 just about matches it.
As for their dx11 capabilities it's debatable whether they will have enough power to provide decent performance.