Debian does not impose hardware requirements beyond the requirements of the Linux kernel and the GNU tools.
Rather than attempting to describe all the different hardware configurations that are supported for the PC platform, this section contains general information and pointers to where additional information can be found.
There are two excellent places to check for detailed information: the Debian System Requirements1 list and the Linux Documentation Project Hardware Compatibility HOWTO2. For information on video card support, you may also want to look at the XFree863 Project web site.