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Windows 7: Bootup BSOD - CPU failure?

20 Apr 2010   #1

Win XP Pro/Win 7 Pro
Bootup BSOD - CPU failure?

Windows 7 Pro 64-bit installed and worked perfectly for a week. Then it began giving me the occasional random BSOD on bootup until it eventually stopped booting at all. I tried recovering from the Windows 7 install disk but it gives me the same BSOD. Here is where it occurs:

It boots from the disk and copies the files just fine

Then the progress bar moves for a short time

Then this:

I ran several HDD tests (CHKDSK, Seatools, SpinRite 6) without a single error. I also tested the memory (memtest86 and windiag) but found no errors. I finally formatted the HDD for a fresh install and it still didn't work.

I reinstalled XP Pro 32-bit and it has been working flawlessly for six months.

Since then, I have systematically replaced the HDD, memory, DVD-ROM, PSU, and motherboard (going from a P35 to P45 chipset). I also tried three different video cards (1 ATI and 2 nVidia). The only thing I have not replaced is the CPU (e8400) because of the expense. None of these things fixed the problem.

When I try to install, I disconnect all the peripherals and internal components not necessary for installation. I've tried a PS/2 keyboard with no USB devices connected. I tried the backup disk I got from MS instead of the ISO I downloaded (which is what I used to install in the first place). I've flashed to the latest BIOS. I've played with every BIOS setting I can think of that might be causing the problem. None of this works.

The only hardware I haven't tested is the CPU. XP 32-bit works fine but Windows 7 64-bit does not. Is it possible that a CPU could fail in a way that it will not run a 64-bit OS but will still run a 32-bit OS?

It's got to be a hardware failure but I have never heard of a CPU acting this way. What else is there to try before replacing the CPU for an unlikely fix?

Original setup:
Gigabyte P35-DS4
4GB Corsair DDR2 800
Seagate Barracuda 250GB
Geforce 8800GT
Antec Truepower 550W

New setup:
e8400 (same one)
Gigabyte EP45-UD3P
4GB Patriot DDR2 1066
WD Black 500GB
Radeon 4890
Antec Truepower 750W

EDIT: added hard drives to setups

My System SpecsSystem Spec

20 Apr 2010   #2

Windows 7 x64 pro/ Windows 7 x86 Pro/ XP SP3 x86

Stop error 7B means windows cant access the boot drive. Your chipset drivers/ storage drivers may be acting up or your hard drive may be failing. Though you did say, XP has been running fine for 6 months.

Try updating your chipset drivers/ storage drivers. As a side note, does your bios have the option to switch from AHCI to IDE? I just remembered this because in XP, i used to occasionally come across this error and that was always because in the bios the drive mode had got toggled from IDE to AHCI.
My System SpecsSystem Spec
20 Apr 2010   #3

Win XP Pro/Win 7 Pro

The SATA controller is set to IDE by default and AHCI does not work either.

Are you talking about updating the windows drivers? I don't even have Windows 7 installed so I'm not sure how that would help install from the disk.

What else could keep it from accessing the boot drive? I've tried two different cleanly formatted, error-free HDDs so it must be a problem in BIOS, no? But why would it have failed like it did, BSODing intermittently at first, then failing altogether?

Should I scrounge up a PATA drive to try booting from?
My System SpecsSystem Spec

20 Apr 2010   #4

Win 7 64 bit professional

Have you tried resetting the bios. Sometimes bios corruptions due to weak batteries etc. can be the problem. There are two steps that you can take.
1) go into bios and set it to default.
2) reset the bios on the motherboard using jumpers and temporarily removing the bios battery.
If step 1 does not work, try step two.
My System SpecsSystem Spec
20 Apr 2010   #5

Win XP Pro/Win 7 Pro

Yes I've reset the BIOS several times. The problem persists across different motherboards anyway.
My System SpecsSystem Spec
23 Apr 2010   #6

Win XP Pro/Win 7 Pro

Anyone have a clue here? I am completely out of ideas at this point. I wonder of Microsoft could help...

Also - when it BSODs before it's even installed, does it do a dump anywhere on the hard drive?
My System SpecsSystem Spec
23 Apr 2010   #7

Win 7 64 bit professional

here is a long shot and I am reaching. Windows XP will not access your 4 GB of RAM, however Windows 7 64 bit will access all the RAM. It is possible that you have a bad stick of memory that is ignored by Windows XP but comes into play with Windows 7. Try removing two sticks in different combinations and see if that makes a difference.
My System SpecsSystem Spec
23 Apr 2010   #8

Win XP Pro/Win 7 Pro

That's a good thought but I've already tried it. I tried each stick individually from both matched sets and in every slot. I've also tested them thoroughly with memtest and windiag. I'm pretty sure it's not the memory.
My System SpecsSystem Spec
23 Apr 2010   #9

Win 7 64 bit professional

Another long shot-- have you tried underclocking your cpu or increasing your vcore and vdimm ?
My System SpecsSystem Spec
23 Apr 2010   #10

Win XP Pro/Win 7 Pro

Nope, I'll give those a try. But if installing Windows 7 means that I have to underclock my CPU, I'm going to be pissed.
My System SpecsSystem Spec

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