Graphics Cards

[seemore907]

Hi! I have recently received Amnesia: The Dark Descent as a gift. I have also learned it does not work on my computer due to the fact that I have Intel Integrated Graphics. Oops! I have heard that I ca purchase and install a new graphics card directly into my PC. Is this true? If so, I found two cards that might be an option.
VisionTek - ATI Radeon HD 3450 512MB DDR2 PCI Graphics Card-
or EVGA - NVIDIA GeForce GT 630 2GB DDR3 PCI Express 2.0 Graphics Card

I will post the links from BestBuy if requested!

I have a Dell PC with Intel Core and Windows 7. I apologize but this is really all I know about the hardware. Can someone please tell if it would be possible to buy one of these cards and install them directly into my PC?

And, most importantly, would Amnesia work with either of these cards or do I have to keep looking?

Any help is welcome and if I sound like a complete idiot, let me know and I'll delete this forum! Cheers!