Are you talking integrated graphics or actual cards? Do you have a dedicated video card or is it incorporated in the motherboard?
For example I have 6150LE integrated graphics on my mobo but I run a dedicated 8600GT video card.
Okay. I've got an HP Pavilion a6157c desktop with 2gigs RAM, Intel 4400 chip (2.00GHz). Running Vista Home Premium. I've had trouble with the last 2 HP's I had and returned them before the store warranty expired. No, I'm not a dedicated HP fan, just didn't have a huge selection to go by (Costco). And it seems nowadays, most manufacturers are pretty equal. But each time I get a new HP there, the model changes. The first 2 (a1777c and a6077c both with Vista Home Premium), ran on the NVIDIA GeForce 7500LE graphics cards. Now, the latest model I have (a6157c), is running on the Intel Graphics Media Accelerator 950 card. Why? What's the difference in the cards? Why would they switch them out? If I find an issue with this latest HP, I'm done with HP.