I don't understand... hard disk to motherboard compatibility is less of an issue than RAM compatibility. Are you talking a site that lists hard disks and if they support SATA, IDE, etc? If so, your best bet is to use NewEgg's search filters.
The real question is whether or not hard drives are compatible with my Pavilion a614n.I didn't know New Egg had search filters,I will try them. Thanks for your reply!