from a quick google search here is a bit fo a review >
upgrading simply isn't an option when it comes to the system's Intel-integrated graphics. Scoring a woeful 4.5 frames a second in our Doom 3 test, the graphics just can't cope with the latest games - and because the proprietary Dell motherboard has no AGP or PCI-Express 16x slot for a graphics card, you can't replace the graphics card with anything better. For a system designed for home entertainment, this is a serious
flaw. In fact, limited upgrade potential is an issue throughout this system. Only one PCI-Express slot is free for internal add-in cards, while outside, only four USB 2 ports are provided to plug in external devices and there's no FireWire.