Dear friends, I want to run Windows 7 on my old PC.The Mobo has on board ATI graphics, but the vendor does not provide driver for Windows 7. Can you suggest a cheaper Graphic card for the same. Pentium Dual Core 2.8 GHz D820 Intel D102GGC2 512x2 DDR2 RAM @ 533 MHz 80 GB Seagate IDE HDD