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EBay Core 2 Quad Q9500

Hello, I just installed a Core 2 Quad Q9500 that I bought on eBay. I had a Core 2 Duo E8400.

I do not think I got the chip I bargained for. In BIOS it shows up as a 4 core chip with HyperThreading. In CPU-Z it shows up as a 2 core chip with 2 threads. According to the Intel spec page it should be 4 cores and 4 threads.

In all of my performance testing, this thing is slower. To me it seems that 1/2 of the CPU is not functioning. Is that possible? Could it be that I need to install a fresh copy of windows to recognize 4 cores? Is there a way to check/flash/turn on all 4 cores?
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  1. Best answer
    Bios up to date? Check start -> run -> msconfig -> boot -> advance options -> number of processors
  2. Number of Processors was checked and set to 2 cores.
    But there was no option for 4 cores, so I unchecked the box.
    I will reboot and report back.

    Here is how CPU-Z is supposed to look.

    Here is mine showing 2 cores.
  3. Are 4 cores enabled in the BIOS?
  4. The 4 cores were on in every location (inc. BIOS) except for CPU-Z and start > run > msconfig > boot > advanced options > number of processors.
    Thank You Supermuncher, my WEI went from CPU 6.6 to 7.3!

    Another question, when I went to msconfig > boot > advanced, under the cores item my window had PCI LOCK checked. What is that and do I have it correct?
  5. Best answer selected by JoeMomma.
  6. 83% increase in Passmark CPU testing.

    3Dmark 11 = P3545, up from P3365.

    Windows Experience Index
    CPU Memory GPU 3DGPU Disk
    E8400-2 core 6.8 7.0 7.6 7.6 7.8
    Q9500-4 core 7.3+ 7.3+ 7.6 7.6 7.8
  7. Good thing it was an easy fix :)
  8. This topic has been closed by Mousemonkey
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