Although my research says that the best PCI cards are the FX 5600 and FX 5700LE, I have been unable to find them anywhere, including eBay. I have been able to find the FX 5200, 128 MB. Cost is approximately $90 CDN. I would be interested in comments as to whether installing the 5200 would result in a significant improvement over the existing Intel integrated graphics. I have been advisaed to stay away from Radon cards for this particular PC. Any feedback would be appreciated.