An HD3650 will not play what you want it to play. It is out of date and deprecatted - ie - no longer sold to my knowledge though I could be wrong or their could be a few parts hanging out somewhere.
Basically, its a POS by todays standards. Not sure why you want it unless $100 is way too much money. Then it is better than a 3200 HD I guess. The 3650 might get you buy for a short while but I'm guessing this 4770 is orders of magnitude above it for performance. Probably at least 5x faster.
Think of the 4770 as the modern equivalent to the 9600 XT or the 1650 XT in its day.
-S
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