ASUS Mobo does not recognize Core 2 Quad CPU

By mjin12
Jan 28, 2010
  1. I have an ASUS P5K/EPU LGA775 motherboard and a Core 2 Quad Q9550 CPU - 2.83GHz running on Windows 7 Ultimate 64-bit. My motherboard says that it is compatible with the quad core but it fails to read all 4, it states that I have only 2 CPUs.

    When I boot my computer I get a message saying "Unknown CPU detected, please update your BIOS in order to release its full power! Press F1 to continue."

    I have tried updating the BIOS through the ASUS auto updater and I currently have version 0501.

    When I run msinfo32.exe it reads the CPU as being correct but when I go to enable and disable the cores in msconfig>boot>advanced options I only am able to choose 1 or 2.

    Would a reformat be inorder or is my motherboard not able to handle this specific quad core?
  2. dividebyzero

    dividebyzero trainee n00b Posts: 4,891   +1,264

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