great thanks for all your helpful replies....
"What makes you think it doesn't support SATA II if you don't mind me asking?"
The problem is that I keep getting this error that says that the system is - "limiting SATA link speed to 1.5 Gbps" and it has to "hard-reset"
This has caused the machine to freeze a couple of times.
I should mention two things:
1. That the SMART tests show 100% health in both windows and linux tests
2. That the system freeze is ONLY in linux.
(PS I know that the issue seems to be in linux but you guys are so knowlegeable about all things I thought to ask you all!!)
THanks as usual for your help!