Windows 7 Forums

Welcome to Windows 7 Forums. Our forum is dedicated to helping you find support and solutions for any problems regarding your Windows 7 PC be it Dell, HP, Acer, Asus or a custom build. We also provide an extensive Windows 7 tutorial section that covers a wide range of tips and tricks.


Windows 7: Can't install x64 after upgrading to quad core?

20 Apr 2009   #11
chris3g

osx86 10.5.6
 
 

The only variable here is the switch from the dual core e6600 to the quad core Q9400. I've been running osx along with various versions of windows inclulding xp, vista, and win7 7000 x64, 7057 x64, and 7068 x64. They are on separate hard drives, and osx loads using pc-efi v9 which is only installed on the osx drive. No changes or hacks are made to the bios. I don't use any 3rd party boot managers, i simply choose which os to boot by selecting the primary drive from the BIOS boot selection screen. I can and have removed the os x drive from the system and it is then exactly the same as any other pc.

I only mention the fact that i have os x installed because because it is also a 64-bit OS and is running as usual after switching processors, which would seem to rule out an actual problem with one of the CPU cores. (possibly leading to the OS thinking there was some sort of multiprocessor mismatch going on...)

edit: i did reset my bios to defaults when i upgraded the processor, so it's possible there is a setting that i have adjusted differently than before when everything was working...


My System SpecsSystem Spec
.
20 Apr 2009   #12
chris3g

osx86 10.5.6
 
 

found a report from another user with the same issue, same motherboard -

MULTIPROCESSOR_CONFIGURATION_NOT_SUPPORTED error while trying to install Windows 7 64bits

Same BIOS version as me. Now i am trying to remember if the last time i was using win7 was before or after i updated to the latest BIOS revision...
My System SpecsSystem Spec
20 Apr 2009   #13
chris3g

osx86 10.5.6
 
 

Sorry for the multitude of posts, but i've found the solution.

There appears to be an incompatibility with the latest BIOS for my board. I had updated to this BIOS in anticipation of swapping CPU's but had not attempted to boot windows 7 until after the new CPU was in, so i don't know if the problem would have also shown itself with the dual-core CPU.

Rolling back to previously released BIOS version fixes the problem. Unfortunately for me, that previous BIOS also does not properly recognize the Q9400, it just shows up as "intel cpu". I'll have to see if that causes any issues...
My System SpecsSystem Spec
.

21 Apr 2009   #14
jimbo45

Linux CENTOS 7 / various Windows OS'es and servers
 
 

Quote   Quote: Originally Posted by chris3g View Post
i did find one report of the same problem when searching, here - Windows 7 Installation not compatible with multi-core processors!?

no resolution though
This must be total B/S as W7 works fine on QUAD processor - no probs

Cheers
jimbo


Attached Thumbnails
Can't install x64 after upgrading to quad core?-quad.png  
My System SpecsSystem Spec
21 Apr 2009   #15
baarod

El Capitan / Windows 10
 
 

Quote   Quote: Originally Posted by chris3g View Post
Sorry for the multitude of posts, but i've found the solution.

There appears to be an incompatibility with the latest BIOS for my board. I had updated to this BIOS in anticipation of swapping CPU's but had not attempted to boot windows 7 until after the new CPU was in, so i don't know if the problem would have also shown itself with the dual-core CPU.

Rolling back to previously released BIOS version fixes the problem. Unfortunately for me, that previous BIOS also does not properly recognize the Q9400, it just shows up as "intel cpu". I'll have to see if that causes any issues...
Change the Limit CPUID value in the BIOS. That'll do it.
My System SpecsSystem Spec
05 Jun 2009   #16
JohnE

Win7 7133
 
 

Please provide the output of "reg query HKEY_LOCAL_MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\ /s" from the affected system.

Thanks,
JohnE [MS]
My System SpecsSystem Spec
05 Jun 2009   #17
JohnE

Win7 7133
 
 

What is really needed is the output of CPUID 0x1 for each processor. Tools like CPU-Z can dump this from the 'About' tab by clicking 'Register Dump'. I don't know what would be comparable on osx86
My System SpecsSystem Spec
Reply

 Can't install x64 after upgrading to quad core?




Thread Tools




Similar help and support threads
Thread Forum
Is this good gaming? Intel Core i5-2400S Quad-Core Processor 2.5 GHz 4
Here's a link to what I'm thinking about buying. I've never messed with these "barebones" PCs before. What exactly will I need for it to run games like BF3. Thanks, sorry if I'm being vague, I really don't know too much about this area of PC Intel Core i5 2400S Quad Core Processor 2 5 GHz 4 GB...
Gaming
Quad core processor only running on one core.
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. ...
Hardware & Devices
Wondering about upgrading from dual core to quad core CPU with Win 7
I am just wondering about the CPU I just ordered from E-Bay new and how it will perform with Windows 7 64 Bit compaired to the one I have now this is the one I ordered: AMD Phenom X4 Quad CPU 9500 AM2+ 2.2 GHz 3600MHz 4MB :D This is the one I have now: AMD Athlon 64 X2 Dual core 3800+ 2GHz I...
Hardware & Devices
What is better for PC gaming Dual Core or Quad Core?
i have a Intel E5400 Overclocked to 3.23GHz and was going to upgrade to a Q9400 quad and was wondering as i mainly use my PC for high end gaming is quad core as important as it is used more for multitasking and i was told dual would be better for gaming is this true?
Hardware & Devices
Upgrading from a dual core to a quad core!
Hi all! I am not computer illiterate. I have a question for you. I am switcing from an AMD dual core 2.4GHz to a Phenom 9750 Quad core. Changing out the heatsink and fan also. Can I just swap out the CPU's and restart Windows 7 Ultimate 64bit. Or do I have to do a complete reinstall of the same OS?...
Installation & Setup
Upgrading to a quad core ISSUES!
Im rather frustrated so I will keep this short. Cleared the CMOS, reseated the battery and all RAM chips too. Running a dual core 2.0 GHz 800 FSB. I have a core 2 Quad 2.6 GHz 1333FSB that I tried to put in. Hits verifying DMI pool data then resets OR displays "Bootmgr is missing" blah blah blah...
Installation & Setup


Our Sites

Site Links

About Us

Find Us

Windows 7 Forums is an independent web site and has not been authorized, sponsored, or otherwise approved by Microsoft Corporation. "Windows 7" and related materials are trademarks of Microsoft Corp.

© Designer Media Ltd

All times are GMT -5. The time now is 03:45.
Twitter Facebook Google+ Seven Forums iOS App Seven Forums Android App