i7-6700K: Motherboard not detecting PCI-E devices but want to eliminate fault with cpu.

[TOlin]

Hello,

I have the following system build that will not detect the graphics card in any pci-e slot. I have another motherboard on order but I wanted to confirm the issue is not related to the processor since I read the pci-e communication is handled by the processor.

Longer version... I've been running Windows 10 without issue for about a week, have run memtest 86 for 8 hours without errors and just ran the Intel Processor Diagnostic Tool and it returned 0 errors. System is currently running with integrated graphics. The NVIDIA GTX 980 ti card is installed and receiving power but is not recolonized by the system (no video out and windows does not show it as a device). The video card does work on another system. I also tried an older Radeon HD5770 and have the same results (no video or windows detection). I just want to see if there's anything else I can do to eliminate the possible cause due to something in the processor. I due have another motherboard being shipped and have a support issue open (no response) with Gigabyte.

Thanks,

Tom

System Build

CPU: i7-6700K

Motherboard: Gigabyte GA-170X-SOC Force

Memory: Crucial Ballistix Elite 32GB Kit (BLE4K8G4D26AFEA)

Cooler: Corsair Hydro H110i GTX

Storage: 3 - Samsung 950 Pro 512GB PCIe NVMe M.2 (SSD)

Power Supply: Corsair AX860i

[AJana1]

Hello TKO365,

Please refer to the http://download.gigabyte.eu/FileList/Manual/mb_manual_ga-z170x-soc-force_e.pdf manual of http://www.gigabyte.com/products/product-page.aspx?pid=5482 GA-Z170X-SOC FORCE, turn to page 25, pay attention to the description of OC PCIe Switch (PCIE_SW).I wish this could solve your problem and good luck!

Best Regards,

Aaron Janagewen

[TOlin]

Aaron,

Thanks for the reply. No the switches are all on. I did turn them off to see what happens at boot and the graphics card does not receive power (no fans or led).

Tom

[AJana1]

What about the configurations under UEFI/BIOS?

[TOlin]

I only have the UEFI BIOS option and have tried most settings. I updated the BIOS to the latest stable release and then to the most recent beta and both had the same results. Back in the day this type of problem could be caused by the motherboard standoff screws shorting the board but the installation looks good.

[AJana1]

Well, that might be something wrong with contact between display card and mainboard, but this time the best solution is to contact with Intel and/or Gigabyte.