Super User is a question and answer site for computer enthusiasts and power users. It's 100% free, no registration required.

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

I recently upgraded my server downstairs from a E8400 to a Q6700.

However, when I go into task manager and every other tool, the computer swears that there are only 2 cores on the machine. In addition to that, the computer runs FREAKING slow.

Does anyone have any ideas? I'm at a total loss...

share|improve this question
You could need to do some BIOS upgrade. Have a look at the BIOS changelog. Which board? – Jens Erat Nov 1 '11 at 17:06
EVGA nForce 780i SLI FTW motherboard – David Nov 1 '11 at 17:09
Run a Linux Live CD and you will see if the additional cores are generally visible. – Robert Nov 1 '11 at 17:10
Good idea - didn't think of that! I will when I get home tonight – David Nov 1 '11 at 17:16
` the computer runs FREAKING slow` <-- Sounds more like a disk issue than a CPU issue. An E8400 is pretty damn fast. – Billy ONeal Nov 1 '11 at 17:16
up vote 3 down vote accepted

Do a BIOS upgrade. The changelog for the latest version includes this:

Improve CPU compatiblity

This will probably solve your issues.

share|improve this answer
I just RDP'd in and CPU-Z reports the BIOS are on a VERY old version. Great idea, I'll try when I get home! – David Nov 1 '11 at 17:19
After updating the BIOS, the problem remains.. – David Nov 4 '11 at 12:49
Didn't get at first it was a downgrade... Can you switch the CPUs between your both computers (so test the Q6700 in your gaming rig)? What's CPU-Z telling about the Q6700? – Jens Erat Nov 4 '11 at 14:30
After a BIOS flash and a reset I have all the cores! Thanks a lot! Computer is still slow and buggy though O_o – David Nov 7 '11 at 13:49

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.