Solved

My Win8.1 Install is Missing Processor Cores?

Posted on 2013-12-06
4
499 Views
Last Modified: 2013-12-29
I recently upgraded my computer (Built a new one) with an Intel i7-4930K processor. I was a little disappointed at the performance because the differences between my old computer (an i7 that is three years old) and this one is negligible.

I have noticed that he CPU is frequently pinned to 100%, which would account for the sluggishness.

Then I saw this:

WTF? 2 cores?
This processor has 6 cores, not 1. The total logical processors should be 12 not 2.

Device manager sees them (6 cores with 2 logical processors per core for a total of 12):

6 cores @ 2 threads each = 12
But it's not performing like it should.

What am I missing here? Task manager and resource monitor should see 1 socket, 6 cores, 12 logical processors. How do I fix this?
0
Comment
Question by:DrDamnit
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
4 Comments
 
LVL 17

Expert Comment

by:Chris Millard
ID: 39702196
Run MSCONFIG, then goto the Boot tab and click on Advanced options... Make sure you don't have the "Number of processors:" options ticked, or if you DO want it checked, set the correct number from the drop down.
0
 
LVL 95

Accepted Solution

by:
Lee W, MVP earned 500 total points
ID: 39702252
Checked BIOS/UEFI to ensure there's no setting disabling multi-core and/or have you tried upgrading BIOS? (No idea why this is happening so looking at possible causes).
0
 
LVL 32

Author Comment

by:DrDamnit
ID: 39702292
Upgrading the BIOS did it. According to Asus' website, the i7-4930K is supported at BIOS version 4301, which is what I had installed.

What they don't tell you, is that this board (Sabertooth X79) uses  a series of Xeon devices to control the CPU. I had to get updated drivers from here, and then update the BIOS to the latest version, whcih is purported to be the support update for XEON chips, but the i7 needs the update so the drivers can talk to the other parts and peices on the CPU.

None of this is in the documentation, drivers not on the CD. Windows 8.1 just shrugs its shoulders.

I figured it out because I had some "Base system devices" that weren't installed. That led me to the Xeon drivers (above), and the Xeon made me think that there would be a BIOS update...

Sometimes... it shouldn't be this hard. :-)
0
 
LVL 54

Expert Comment

by:McKnife
ID: 39745390
"What they don't tell you, is that this board (Sabertooth X79) uses  a series of Xeon devices to control the CPU." Don't let it bother you, but that reads funny... Xeon is a processor type itself not a "device" used to control one.
0

Featured Post

Simplifying Server Workload Migrations

This use case outlines the migration challenges that organizations face and how the Acronis AnyData Engine supports physical-to-physical (P2P), physical-to-virtual (P2V), virtual to physical (V2P), and cross-virtual (V2V) migration scenarios to address these challenges.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

I use more than 1 computer in my office for various reasons. Multiple keyboards and mice take up more than just extra space, they make working a little more complicated. Using one mouse and keyboard for all of my computers makes life easier. This co…
What do we know about Legacy Video Conferencing? - Full IT support needed! - Complicated systems at outrageous prices! - Intense training required! Highfive believes we need to embrace a new alternative.
This Micro Tutorial will teach you how to reformat your flash drive. Sometimes your flash drive may have issues carrying files so this will completely restore it to manufacturing settings. Make sure to backup all files before reformatting. This w…
Windows 8 came with a dramatically different user interface known as Metro. Notably missing from that interface was a Start button and Start Menu. Microsoft responded to negative user feedback of the Metro interface, bringing back the Start button a…

735 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question