Topic
2 replies Latest Post - ‏2013-03-16T14:58:55Z by SystemAdmin
SystemAdmin
SystemAdmin
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Pinned topic X3400 7975AC1

‏2013-02-28T04:58:18Z |
Have a X3400 7975AC1 series server, with a single Xeon 5110 CPU, was looking to beef it up a bit and though the BIOS change logs there appeared to be support for a xeon 5450.

However when I install just a single E5450 (SLANQ, C0 Stepping) the system no longer boots, fans will spin up for half a second and then shut down again.

There is a amber LED displaying on the board on the top left corner (Right near where the fan shroud meets to blow over the DIMMS) near CPU socket 1, however I can't find any reference to what that LED does either.

Any thoughts of comments? Is the CPU just not compatible? VRM issue? System boots everytime I reinstall the 5110.

Bios has been updated to the last release 1.74.
Updated on 2013-03-16T14:58:55Z at 2013-03-16T14:58:55Z by SystemAdmin
  • SystemAdmin
    SystemAdmin
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    Re: X3400 7975AC1

    ‏2013-03-13T23:59:24Z  in response to SystemAdmin
    Ok so I scrapped the Idea of running 5450's and got a pair of 5430's which have the exact same problem booting.

    These CPU's are listed on the FRU system service parts guide for this model, but looking deeper there is a note literally buried in a serverproven document that states *quad core CPU's need REF 5 planer motherboard FRU 44R5619 where I have a FRU 43W5176 motherboard.

    This note only appears near the 5400 series CPU's, I don't want to go out and get a pair of 5300 CPU's to find out they don't work, and rather not just limit myself to dual cores (if these even work)

    Where can I find a list of proven CPU's to match the board, rather disappointed that this documentation is so obscure fully of numerous points stating compatibility but not specifying if it will support it.

    Next items to consider:

    X5355
    E5335
    E5160 - Last Choice since it's just dual core.
  • SystemAdmin
    SystemAdmin
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    Re: X3400 7975AC1

    ‏2013-03-16T14:58:55Z  in response to SystemAdmin
    For those that may need this information later:

    Harpertown CPU's (54xx series) require a newer revision to the motherboard (REF5, see FRU above)

    53xx series CPU's do work, including the unmentioned E5345. IBM's disclaimer of "Quad core CPU's require..." Really should read "45nm CPU's..." or "E54xx Series CPU's...".