I bought a budget card some long time ago to get rid of that onboard crap, but I begin to see its not enough for me (GT220) While playing games such as TF2 on highest settings, starts lagging and dropping FPS to 30's etc.
So im planning to buy a new card, this time from ATI.
I had this on mind:
Are those cards good for mid gaming providing some good FPS?
I would drop about 100 bucks and go for a Athlon/Phenom II X4 and then buy the 5750. You will get increased FPS because of the vid card but also the extra cores will help 10-30% too. Dual core Athlons choke FPS unless you have a BE that is OC'd to around 3.2ghz. If you can spring for it the 940 and 955 are getting really cheap.
I saw a 30% difference just going from a Phenom II 920 @ 2.8ghz to a 955BE @ 3.2ghz.
That depends on weather there is a drive cage behind the pci-e 16x card slot. Both the 5750 and the 5770 are dual slot cards but they are also much shorter than more expensive cards too. You need to take measurements to verify the fit.