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

20 Apr 2009   #1

osx86 10.5.6
 
 
Can't install x64 after upgrading to quad core?

Here's a strange problem. I've previously run various win 7 x64 builds on my system, which had an intel e6600 core 2 duo, with no problems. I recently swapped out the e6600 for a q9400 and i suddenly cannot install any build of Windows 7 x64. I get the following bluescreen error immediately upon booting from the dvd - MULTIPROCESSOR_CONFIGURATION_NOT_SUPPORTED (stop 0x0000003e) Apparently this error generally relates to trying to run or install windows on a multiprocessor system where the processors are not matched, but all i have here is a single quad core

Just for the hell of it i then tried a 32bit install dvd and it installed and ran just fine.

Anyone have any ideas?

My System SpecsSystem Spec
20 Apr 2009   #2

Vista Ult 64bit - Windows 7 Ult 7264 64bit
 
 

Hi & Welcome to our Forums!

That is odd...I think it sounds like something in the BIOS needs to be changed. Since it went from 2 to 4 cores there may be something needing a change in the BIOS to make the system see the extra cores as a single processor unit.

Can you post your MB version, BIOS version please?

Thanx
My System SpecsSystem Spec
20 Apr 2009   #3

osx86 10.5.6
 
 

Sure, i have an ASUS P5W-DH Deluxe with the latest bios, 2801.

My primary OS is osx86 10.5.6 and i have not had any issues with that after the processor change.
My System SpecsSystem Spec
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20 Apr 2009   #4

osx86 10.5.6
 
 

i did find one report of the same problem when searching, here - Windows 7 Installation not compatible with multi-core processors!?

no resolution though
My System SpecsSystem Spec
20 Apr 2009   #5

Windows 7 Ulti x64
 
 

Windows 7 x64 and x86 does support multi-core. It is operating fine with mine. You are dual booting with OSX is that right?
My System SpecsSystem Spec
20 Apr 2009   #6

Vista Ult 64bit - Windows 7 Ult 7264 64bit
 
 

Quote:
My primary OS is osx86 10.5.6
???

I can see it's x86 so 32bit, but just what does 10.5.6 mean? I assume that it's a Windows 7 build since you're here @ Windows 7 forums but there's no 10.5.6.

I take it that since it's an Asus board, you have an Award BIOS, version 2801
That version fully supports the quad core so that shouldn't be the prob...lemme check on that error code.
My System SpecsSystem Spec
20 Apr 2009   #7

Vista Ult 64bit - Windows 7 Ult 7264 64bit
 
 

Ok, I need to know what version of Windows 7 you're trying to install.

Apparently, some builds that were not Officially released may have broken Multi-Core support and it may be just the build version you're trying to install. If you have some previous versions try those, like try build 7000 or 7022.
My System SpecsSystem Spec
20 Apr 2009   #8

Windows 7 Ultimate 64-bit
 
 

Quote   Quote: Originally Posted by Chappy View Post
???

I can see it's x86 so 32bit, but just what does 10.5.6 mean? I assume that it's a Windows 7 build since you're here @ Windows 7 forums but there's no 10.5.6.

I take it that since it's an Asus board, you have an Award BIOS, version 2801
That version fully supports the quad core so that shouldn't be the prob...lemme check on that error code.
Hackintosh -- folks who run bootleg Apple software on their PCs. Bit of an identity crisis if you ask me

What BIOS hack are you using to load OSuX? It's prolly hosed your whole system...

Either way, load BIOS failsafe defaults and reload Windows 7.
My System SpecsSystem Spec
20 Apr 2009   #9

Vista Ult 64bit - Windows 7 Ult 7264 64bit
 
 

Ahhh, Thx Baarod old bud!
That also may explain things here too..whaddya think?

Since this stop code usually means that multiple processors are asymmetric to each other, which doesn't really apply to singular processor/multiple core setups, something seems like this is being seen as a muli-processor system during setup, again taking me back to a BIOS issue.
My System SpecsSystem Spec
20 Apr 2009   #10

Windows 7 Ultimate 64-bit
 
 

Quote   Quote: Originally Posted by Chappy View Post
Ahhh, Thx Baarod old bud!
That also may explain things here too..whaddya think?
Apple hardware is EFI or Extensible Firmware Interface -based rather than our old crusty BIOS. What's funny is that Windows 7 runs natively on a Mac but MacOS needs egregiously hacked BIOS and loader code get loaded since we're "lacking" that EFI.
My System SpecsSystem Spec
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 Can't install x64 after upgrading to quad core?





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