Windows 7 64 Bit Suddenly Only Recognizes One Core
Nov 22, 2012
I have a weird problem with my laptop. my laptop is a dell latitude d630 with an intel core 2 duo T7300 cpu it is a dual core cpu
but since 2 days my computer runs slower. i didn't understand. using cpu-z i saw that my cpu only has ONE core.
i do not understand. can cores go bad separate?
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Feb 11, 2013
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Jul 28, 2010
I'm having is that I recently installed Windows 7 Ultimate (from XP Ultimate) and the computer was working really slowly.
First I opened task manager and found only one CPU was being monitored, there was only one window for one CPU, not two windows with only one firing!
This I found strange, checked the WEI and my processor got a 2.3 rating (its a Core 2 Duo @ 1,83Mhz, a T5600), I then downloaded a tone of widgets to check if they could "see" the other core, nothing. I went into msconfig, the no. of processors box is unchecked, if I check it, the drop down menu only gives me the option of picking 1 CPU.
using Vista, but I can't seem to be able to use his fix: [URL] (bottom of page, can't find the HAL detection checkbox)
I am running Windows 7 Ultimate on an HP nx9420 laptop with 3GB of RAM, a new HDD (250GB), the old one just stopped working really, and the Core 2 Duo T5600 @ 1,83Mhz that is running only one core.
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Jul 8, 2011
I have a pc that came with XP but is now running windows 7 Home Premium 32 Bit. (SP1 with all updates)
Ever since i upgraded windows has only seen one core even though its a dual core system. The processor is a AMD Athlon 64 Processor 3500+ 2.20Ghz.
I have checked the BIOS and cant find any related settings and when i go to msconfig in the boot menu (advance) Number of processors is unchecked by default and if i check it the drop down only shows one core. The device manager is not showing any driver issues.
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Oct 30, 2011
I'm not overly familiar with low-end hardware (look at my specs ). What was the difference between Intel's Core 2 Duo and their Pentium Dual core? They seemed like identical CPUs to me.
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Aug 6, 2011
The computer I'm using is older (3+ years) and has frustrated me a few times, most notably in the past 2 months.
That said, this is a new problem. My second (DVI) monitor is detected by Windows but doesn't display anything. In both the display settings and the NVIDIA control panel, I can see a second (Impression) monitor, but it's blank and I can't get it to show anything. In fact, the monitor doesn't seem to recognize that it's connected, because the orange "power but no input" light is on rather than the green "power and input" light.
This is a Windows 7 64-bit installation on a Dell Dimension E520.
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Feb 23, 2013
I just installed Windows 7 Ultimate 64 bit OS. The BIOS sees both hard drives and the CD and DVD drive and the Windows Device Manager shows the extra hard drive and both optical drives. When I click the folder in the task bar (Libraries) I can only see "C" drive and no optical drives either. When I click on the CD drive I get the right menues for it, but it does not work at all. If I put a CD in the drive it locks up the system and I have to power off the computer before I can eject it.
System Info:
Tech Support Guy System Info Utility version 1.0.0.2
OS Version: Microsoft Windows 7 Ultimate, Service Pack 1, 64 bit
[Code].....
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May 15, 2011
I am running Windows 7 on a system I built myself about 18 months ago. I recently added 4Gigs of RAM to the existing 2Gigs.Occasionally I get an error message about being out of memory. It during one such episode that I discovered that only 4Gigs of RAM is actually being used.I've only know about this site for a week or so or I would have been able to give you more specific information
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Nov 9, 2010
QX9650, quad core, task manager, cpu-z, cpu-id, shows showing only 2 two cores.I recently upgraded an Intel E8500 to a QX9650 and had the problem of Windows 7 only showing 2 of the 4 cores.It took a few frustrating hours to find the solution, but I got there in the end without the need for a Windows re-install.
1st: You must have Windows 7 Professional. Home Premium does not support more than 2 cores. Upgrade to Pro.
2nd: If Task manager and CPU-Z are only showing 2 cores, you'll be feeling pretty confused, right?
Go to Start-->Run, type MSCONFIG.Under the BOOT tab, click 'Advanced Options'.In the top left corner it says "Number of Processors" (you'll have been here already and it says '2').Uncheck this and do a reboot.This solved my hours of confusion. Now I have 4 cores in Task Manager, CPU-Z and all is well.If all this fails, then get yourself set up for an OS reinstall; that should get you where you want to be.
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Jul 3, 2012
I'm having an issue with my CPU. It seems that it is only using one of its cores. This issue first became apparent to me when I was trying to run Blacklight Retribution. It popped up a warning message saying that my computer does not meet the minimum requirements of have at least a dual core. And indeed the game was unplayable, with single digit fps constantly. However when i go to the performance tab of my task manager it shows 4 graphs, meaning that 4 cores must be running. Then I go the boot tab of my systems configuration, click on advanced options and underneath the "Number of Processors:" check box (which is unchecked), it shows 1 as the number of processors. My processor is an Intel(R) Xeon(TM) CPU 3.60GHz (4 CPUs), ~3.6GHz.
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So I'm on my computer playing a game and I have a CPU usage gadget by Keat and the gadget is telling me, my Core 2 is at 82% while Core one is at 25%.
aren't they supposed to carry the load equally, Or is that normal? When I have something else up besides the game I'm playing (MineCraft online) it evens out more.
My system specs are Windows vista (but updated to Windows 7 Home premium and completely updated) Pentium dual core cpu t4200 4.00 gb Ram. 64 bit
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