i7 3930K only recognized as 4 cores (Solved)

[siegfx]

Hi guys, I just realized that my 3930K is only recognized as 4 cores and 8 threads...
CPU-Z shows only 4 cores, same thing with core temp.
What's going on here?
Is this normal?

[Jake_HT]

Did you just get a new cpu in an existing build? uninstall all processors from device manager and reboot.

[siegfx]

I did that, It installed new driver, restarted, and it still shows 4 cores =(

[Supergrover]

Bios at latest version? What Board?

[siegfx]

I haven't checked the bios version yet, it's on Rampage IV Extreme (on my system specs).
Would bios version effect it this much? it's a pretty recently released board though

Edit: Just updated to the latest Bios, and it still shows 4 cores only
Current bios is 1101

[jumpload]

best guess, check bios settings.

Meny bios let you turn on\off the Hyper-threading

[IMG]http://www.************/images/articles/1323429127PAlf6ifPah_3_21_l.gif[/IMG]

[siegfx]

The question is, why would I want to disable hyperthreading?
Currently I only have 4 cores detected, and 8 threads, where I should have had 6 cores and 12 threads..

Anyone else got any problem with this?
I have actually seen a youtube video showing the same version of CPU-Z with 3930k showing 6 cores and 12 threads.
Edit: here's the youtube link Sandy Bridge-E i7 3930K Cinebench 10 - stock clock - YouTube

I've had all cores activated on bios too

[G777]

Does task manager show 4c/8t as well?

[frontier204]

Are any cores disabled in BIOS? Try clearing the CMOS and try again.

What does a Linux Live CD tell you? You can get the number of cores in any Linux by typing

cat /proc/cpuinfo

into a terminal. I'm not quite sure whether it will list real cores or HT cores, but anyway if it lists 6 or 12 you're good.

[Phill]

If you run cinebench or AIDA 64 cpu queen does your cpu score properly or are your scores down from what it should be?