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BIOS and new processor.

Alrighty, here goes, started getting BSOD, after 5 months of hunting down the problem I said screw it and bought the same exact model except "debranded" from Newegg so that I could transfer all the hardware improvements over. Memory, PSU, Graphics Card, Blu-Ray Drive, Internal HDD all moved over with ease and are working perfectly (you could have knocked me over with a feather). Then I tried exchanging the processor and got a blank screen and the power button wouldn't light up even though the computer was obviously booting like normal without any beeps or strange sounds. The internet tells me it's probably a BIOS problem. I figure the BIOS has indeed been changed because it just looks different from the old computer when it boots (remember it's the same exact model and yes the motherboard is exactly the same). BIOS is American Megatrends 6.11 but I can't find out what the original BIOS was to make absolutely sure. Anyway, the computer is an HP and they apparently have a way to roll back to the original BIOS. My question is how dangerous is it really to do this. I have read about "bricking" a computer by messing with the BIOS and REALLY can't afford another computer (the reason for going through this in the first place). Any help would be great, thanks!
Motherboard - H-Alvorix RS880 - UATX
OS Name - Microsoft Windows 7 Home Premium
Version - 6.1.7601 Service Pack 1 Build 7601
System Manufacturer - Hewlett-Packard
System Model - p6733w
System Type - x64-based PC
Processor - AMD Athlon(tm) II X4 630 Processor, 2800 Mhz, 4
BIOS Version/Date - American Megatrends Inc. 6.11, 12/28/2011
SMBIOS Version - 2.6
Installed Physical Memory (RAM) - 12.0 GB
PSU - 500w
Graphics - 2GB NVIDIA GeForce GT 610

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All Answers

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That CPU doesn't look to be on the CPU LIST.

In reply to: BIOS and new processor.

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In reply to: That CPU doesn't look to be on the CPU LIST.

Sorry, that CPU I listed is the factory installed CPU (the one currently installed in the new machine and the one I replaced in the old). The CPU I installed on the old computer is the AMD Phenom II X6 1045T Thuban 6-Core 2.7 GHz Socket AM3 95W HDT45TWFGRBOX Desktop Processor.
I installed it a year and a half ago and it had been working great. The HP website tells me my motherboard supports up to and including a 95W AM3 socket AMD Phenom II X6 10xxT Six-Core (Thuban core) processor.

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Here's a shocker.

In reply to: CPU

HP is well known to use any board that meets the specs of the box PC they are building. So if they get boards that don't support other CPUs well, they will use them anyway.

There could be other issues like the CMOS RESET jumper is on or there is some other wiring issue but I take it for granted you start with the fewest parts and connections and build up.

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