HDD from AMD Proc Motherboard not working on Intel Motherb..

I was tring to use my HDD from my HP AMD machine on a Emachine INTEL
Proc as boot disk.

For some reason, the HDD cannot be recogonized on my Intel Proc's
motherboard. When I plug in the same in the AMD Proc Motherboard, it
works great.

I know most of the devices would need to be reinstalled by doing this
due to a diffrent chipset. But didn't know that HDD itself would not
be recogonized.

Could someone explain why this could happen?

Thanks in advance.

Sekhar