Biostar P4M80-M7 motherboard and Pentium D 940?

Hi!

I have a Biostar P4M80-M7 motherboard and I can't seem to find any documentation if an Intel Pentium D 940 3.20GHz / 4MB Cache / 800MHz FSB / Dual-Core / Presler / OEM / Socket 775 / Processor will work on it.

Sebastian_StraussAsked:
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CallandorCommented:
If what you have is the same as the P4M800 Pro-M7, then the Pentium-D is supported by this motherboard: http://www.newegg.com/Product/Product.asp?Item=N82E16813138032 

The P4M800-M7 http://www.newegg.com/Product/Product.aspx?Item=N82E16813138263 also has support for dual core processors, so I would expect that this chipset (VIA P4M800) supports Pentium-D.
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Sebastian_StraussAuthor Commented:
No, I found that too. Unfortunately, I have a P4M80-M7 -> http://www.biostar-usa.com/mbdetails.asp?model=p4m80-m7

I'm just not sure how to read this. It says it supports Celeron-D. Is that the same as a Pentium D?

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CallandorCommented:
No, a Celeron-D is unrelated to a Pentium-D; it just has a 533 FSB and additional SSE instructions, it is not a dual core cpu.  VIA's main website in Taiwan doesn't even list the P4M80-M7, though it does list the P4M800-M7: http://www.biostar.com.tw/products/mainboard/model.php3?socket=775

This may be a case of different motherboards being marketed in different countries.  Here's a site that says the P4M80-M7A supports dual-core processors http://www.3gplaza.com/estore/control/Computer3G/productdetails?id=54397&srccode=PW, but that's not the same as a P4M80-M7.  Note that the P4M800-M7 doesn't say it supports dual cores, but the P4M800-M7A does.  Your best course may be to contact Biostar and ask them directly.
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Sebastian_StraussAuthor Commented:
Yeah, I tried that but their support site says "We'll try to get back to you, but we get an aweful lot of emails everytime, we might not get around to it" :)

Let me ask you this though: It seems as if my Bios is from 2004 (also, the Biostar Bios updater identifies it as P4M800). Whenever I put above mentioned Pentium-D 940 into the socket, the computer has power, but it doesn't start up, I can't even see the Bios screen. When I put the old CPU back, it works fine. If I update the Bios to the 2006 version, do you think there's a chance that it'll boot with the new CPU? I would have thought that even if it doesn't support the new cpu with the old bios, it would boot into the bios screen? Or am I wrong? All my questions probably sound stupid, I'm sorry.

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CallandorCommented:
No, these are good questions to ask.  If a cpu is not recognized by the BIOS, it can just sit there and do nothing, because a working cpu is vital to being able to do anything, including displaying the BIOS screen.  What you can try is first resetting the CMOS with the motherboard jumper by moving it from the normal position (1-2) to the clear position (2-3) and back again.  If that doesn't do anything, an update to the BIOS in this case can help, but make sure you don't interrupt it while it is flashing - a UPS would also be a good idea if you have one.  The chipset seems capable of supporting the dual core cpus.
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Sebastian_StraussAuthor Commented:
Ok, I finally got an answer back from Biostar:

P4M80-M7 does not support dual core CPUs. The upgrade would be the P4M80-M7A, which does support dual core CPUs.

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