*Z400 confused noises*

[bakaka04]

Hey everyone, i recently bought an hp z400 workstation with an xeon w3565 4c8t, and when got it i turned im on and i noticed the hyperthreading was disabled so i had 4c4t then when i turned the hyperthreading on i was getting 2c4t and i tried so much diferent things but nothing seem to solve the problem, i'm hoping to get some tech tips from you guys.

Thanks!!! :})