I posted that I was copying large files. I have also tried other groups of large files (1GB+). I am well aware that copying large amounts of small files will decrease overall copy rate. So I really wasn't trying to be insulting, but if you thought I meant that I was copying the Windows folder, or something goofy like that I can see where you got confused. But I tried to be explicit that it was 15 files totaling about 20GB in size.
I'll let you all know how the new drive performs. I am partly worried it is the motherboard, but crossing my fingers it isn't.