Hello, I'm new to Tom's Hardware and would like to see if anyone can help me with this issue. So what happened was, I formatted my hard drive and installed Windows 7 64 bit (previously had 32 bit win7) and I began to notice my pc ran slower while gaming. So I opened up dxdiag and sure enough my graphics card memory is now 720mbs when it use to be like 1024. My graphics card is an ATI Radeon 4850HD edition. Anyone know whats up?