Suggest me for Graphics Card

I have Dell Optiplex 745 SFF (Small Form Factor) machine. i want to use graphics card for Gaming/Graphics purpose anyone who suggest me the best graphics card at least 512 MB or 1 GB ???
I have
2.13 Core 2 Duo Processor
Ram 4.5 GB
D965 Motherboard
Answer #1
What are the specs for that machine, like cpu and memory and things, so people can tell you what is best and for you not to have something bottlemecking the system.
Answer #2
I have
2.13 Core 2 Duo
Ram 4.5 GB
D965 Motherboard
Answer #3
msi r6850 pm2digd5
Answer #4
Answer #5
The biggest card that you can get into and that is providing that your power supply is a 300w or better and the only card that will fit is a low profile card. So you need to check your power supply to see if it is a 300w or not.
Then you have to look for a card that shows low profile in the decription. The 6670 will play most games on med to low settings but I could be wrong about that I am not a AMD fan.
Answer #6
danish_smart replied: the best graphics card at least 512 MB or 1 GB ???
Graphics cards should NOT be based on amount of memory it has.
A HD 6670 or HD 6570 is probably the best for your system because anything faster will crash your system. Even if it didn’t, your other components would bottleneck performance.
Anyways, all modern GPUs come with at least 512mb, and 1gb has now become the industry standard.
Answer #7
Thanks guys for helping me.