Windows10 CPU Identification Issue  


  1. Posts : 3
    Windows 10
       #1

    Windows10 CPU Identification Issue


    Folks,

    I was running Windows 7, and under device manager all of the chipset and CPU names were showing Intel i9 Series; and I was getting fair performance out of my PCIe GPU and M.2 SSDs devices. GPU showed 14500 on average, disk 25000... overall Performance Test came in at 7500.

    I recently did a clean install of Windows 10. It's been running well and without issues for about a month.

    However, I noticed a slow down, and Performance Test now reports 6000 !??! Narrowing it down I found GPU now only hits 11000 (down 20% from 14500) and M.2 hits 18000 (down 30% from 25000).

    I noticed the chipset drivers all now say Core i7 rather than Core i9. So I just updated all of the chipset drivers from Intel (the installed were all 2016 Microsoft).

    Despite the updates, Device info still shows i7 series, not i9 series as Windows 7 had shown.

    With the huge performance hit, and the hit being predominantly PCIe related (CPU and Memory benchmarks seem normal and unchanged), I am wondering if anyone else has seen this or perhaps knows what is going on.

    Ideas!

    Win10x64 and pretty sure it's 1909.
      My Computer


  2. Posts : 4,224
    Windows 10
       #2

    What does a reliable, well-known 3rd party tool such as CPU-Z say? I've been using that tool for more than a dozen years, and I've never seen it mis-identify a CPU.
    HTH,
    --Ed--

    Here's what it shows for my older Skylake production desktop
    Windows10 CPU Identification Issue-image.png
      My Computers


  3. Posts : 3
    Windows 10
    Thread Starter
       #3

    It isn't an ID issue - it IS an i9-7900x.

    The issue is PCIe transactions under Windows 10 are much slower than the same hardware under Windows 7. I am hoping it is a driver issue, but so far all of the "latest" drivers I have tried have made no difference.

    Here's a series of benchmarks over the course of a year. The last three - larger images - are most recent Windows7 and Windows 10. The lower value for the most recent Win7 bench is likely a bios update for one of the recent Intel bug patches.

    Windows10 CPU Identification Issue-untitled-copy.png

    Windows10 CPU Identification Issue-capture.png

    To be 100% clear: all these benchmarks come from the exact same hardware. The only change was a full and clean install of Windows 10 == and poof, there went most of my PC performance. A 20% drop doesn't seem reasonable... there must be a problem somewhere.

    And here's the drivers that concern me - if anyone with an I9 can take a look to see what Win10 has down for them, I'd appreciate feedback. Note, the PCI region does claim 200 series chipset, which is typically i9 (in my case X299).

    Windows10 CPU Identification Issue-capture.png
      My Computer


  4. Posts : 3
    Windows 10
       #4

    System Devices


    GWild said:
    It isn't an ID issue - it IS an i9-7900x.

    The issue is PCIe transactions under Windows 10 are much slower than the same hardware under Windows 7. I am hoping it is a driver issue, but so far all of the "latest" drivers I have tried have made no difference.

    Here's a series of benchmarks over the course of a year. The last three - larger images - are most recent Windows7 and Windows 10. The lower value for the most recent Win7 bench is likely a bios update for one of the recent Intel bug patches.

    Windows10 CPU Identification Issue-untitled-copy.png

    Windows10 CPU Identification Issue-capture.png

    To be 100% clear: all these benchmarks come from the exact same hardware. The only change was a full and clean install of Windows 10 == and poof, there went most of my PC performance. A 20% drop doesn't seem reasonable... there must be a problem somewhere.

    And here's the drivers that concern me - if anyone with an I9 can take a look to see what Win10 has down for them, I'd appreciate feedback. Note, the PCI region does claim 200 series chipset, which is typically i9 (in my case X299).

    Windows10 CPU Identification Issue-capture.png
    I have the exact same problem and am wondering if you ever found the solution. I have an I9 CPU too but my former I7 still appears as a system device.
      My Computer


  5. Posts : 3
    Windows 10
    Thread Starter
       #5

    Passmark eventually admitted they were skewing the numbers for some undisclosed reason; likely to make a later version of the nVidea chips look better than they actually are. And, after upgrading from 1080 to 2080 to 3080, I can say with some certainly the 1080 to 2080 step was essentially wasted money, and the 2080 to 3080 not really worth mentioning. Yet, Passmark says I gain enormously with each step even though my games all play at similar framerates - the 3080 mainly giving me access to DX 12.
      My Computer


 

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