I second Tom:
badblocks and memtest86 are what I use and works great on all kinds of
hardware. You don't even need a specific OS for memtest86 because you
can make a bootable floppy and test any old piece of hardware it recognizes.
Terry
--
Terry Fielder
terry@greatgulfhomes.com
Associate Director Software Development and Deployment
Great Gulf Homes / Ashton Woods Homes
Fax: (416) 441-9085