I got a 2010 3.33 6 core mac pro with 5870. upgraded to 3x4gb ram from transintl. Ever since i got the computer(right when it came out) i have noticed some weird slowdowns and beach balls. Its the stock 1gb caviar black that came with the computer, but i still think that it should perform better. And lately it has been getting worse, im hearing the little crackles all the time from the hard drive, and under windows 7 my hd got like a 5.4 score. The biggest problem is with logic studio 8, lots of freezing. How do i tell if my hard drive has a problem, and what do i do about it?