Quote Originally Posted by donmarkoni View Post
@Biker
Looks like a Windows issue.
Go to: Start/Run/MSConfig/Boot/Advanced options/Number of processors, is it checked, and if so what is set?
It was unchecked / greyed so tried to force it with 4 and 8 with no success.

This does not explain how an i7 920 is detected fine but the 5570 is 1c 1t every time...

I doubt this is OS it looks like hardware / bios to me...