The integrated graphics can not be upgraded. I would go with getting a discrete graphics card and disabling the onboard video in BIOS. Make sure the PSU can take the additional load from the upgrade; you might be better off upgrading the PSU at the same time. Also, going about 2 GB of RAM could not hurt, esp. if you are using Win7. It is better than Vista with the memory usage, but still... 512 MB is VERY low. Gaming would be difficult even if you had excellent specs graphics-wise.