Is there much of a difference between the above mentioned cards? I want to be able to play games like starcraft2 and diablo 3 smooth even if it means on lowest settings (obviously the min requirements aren't out yet but all opinions are welcome). Also, right away I would like to play supreme commander smoothly. Both would be the 1GB versions.
Basically I'm wondering if I can get away with getting the cheaper one.
More about4650 4670
The 4650 is GDDR2, and isn't as great. I'm not familiar with your games mention either...
I advise you read through this article. It will give you fair benchmarks between the two.
Thanks for the article suggestion, I did read through that and was looking for actual benchmarks on them, but I only saw benchmarks for the 4670 and not for the 4650. That is a good point that its only GDDR2 but I don't know how much of a step down thats going to be. If its going to effect games by 10fps then its worth it to step up to the other graphics card, but if its just 2-3 fps then I'll probably stick with the lower one.