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  1. #1
    ROG Member Array kaefers PC Specs
    kaefers PC Specs
    MotherboardGigabyte Z97N Gaming 5
    ProcessorIntel 4790K
    Memory (part number)2x8GB Mushkin 997122R, 2.4GHz, 10-12-12-28-2T
    Graphics Card #1Sapphire R9 290X
    Monitor2x Eizo EV2736W
    Storage #1Samsung 850 Pro
    Storage #2yes
    CPU CoolerNZXT Kraken X61
    CaseCorsair Air 240
    Power SupplyCorsair AX 860i
    Keyboard Ducky Shine 5
    Mouse Logitech MX Performance
    Headset Logitech H800
    OS Windows, Linux

    Join Date
    Aug 2013

    Unhappy PCIE slot not working

    It worked again after several reinsertions. Maybe just weak slot...
    Last edited by kaefers; 05-11-2016 at 05:01 PM.
    Gigabyte Z97N Gaming 5 • Intel 4790K • 2x8GB Mushkin 997122R • Sapphire 290X Vapor-X red • Samsung 850 Pro • Corsair AX 860i • NZXT Kraken X61 • Corsair Air 240 • Ducky Shine 5 • Logitech MX Performance • Logitech H8000 • 2x Eizo EV2736W • Windows 10, Linux

  2. #2
    ROG Guru: Blue Belt Array jab383 PC Specs
    jab383 PC Specs
    Motherboard24/7 rig : Maximus VI Extreme
    Processori7 4790K
    Memory (part number)16GB Mushkin Redline 2400 10-12-12-28 + 16GB Corsair Vengeance 2400 10-12-12-31
    Graphics Card #1AMD Firepro W5000
    Sound CardM6E Supreme FX
    MonitorDell U2413
    Storage #1Kingston SH103S3240G SSD
    Storage #2Seagate ST1000DM003 1TB
    CPU CoolerCustom water loop, Delidded, Liquid Metal TIM
    CaseCoolerMaster HAF XM
    Power SupplyCorsair HX-750
    Keyboard Logitech G710+
    Mouse Logitech M705
    OS Windows 7 64 Pro
    jab383's Avatar
    Join Date
    Feb 2014

    hI, kaefers

    One suggestion that might work: Try removing the CPU from the socket, inspect the socket pins, then reinstall the CPU. When installing the Kraken waterblock, tighten it snugly, but not too tight. The point is to let any socket pins that moved off the CPU contact point to get back in place. Excess pressure from a cooler is one likely cause for misplaced pins, and the pins can move over time.

    One totally wild possibility is in BIOS Extreme Tweaker tab > Tweaker's Paradise > PCIe Tuning > PCIe Clock Amplitude. You could try to adjust that a few steps either side of 0 to see if it makes a difference.

    Otherwise, the CPU is much more likely failed than the M6F since there are no active components between the CPU System Agent and the PCIe sockets. Bent pins in the PCIe socket being the only likely board issue. What Vcore does the 4770K need for 4.5GHz? Looking for CPU degradation here - voltages over some value between 1.35 and 1.45, depending on the Haswell lottery, will lead to slow reduction of performance in the CPU. In fact, success at the clock amplitude tweak may indicate a little degradation. It's probably safe with Vcore below 1.3 and Vccsa below 1.15.


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