Hello, I have I i7 860 paired up with a Biostar TP55 mobo. When I run CPU-Z it says I have 4 cores and only 4 threads, when I know it should be 8. I've already updated my bios. Any other ideas?
Two first things to check
what is the BIOS setting when it comes to enabled cores and hyperthreading?
Using msconfig, navigate to Boot > Advanced Settings and make sure Number of Processores is unchecked.