PCI Slot stopped working

[snail915]

Hi all! I took my computer apart today to replace 2 of the case fans and switch out my CM Hyper212 Evo for a Corsair Hydro 115i Pro.

After rebuilding the PC it seems my top PCI slot won't work.

1. It gets power as even if I unplug the 8pin connector from the gpu the fans spin up from the PCI power.
2. Tried both GPU's in slot 1 and 2. Neither work in slot 1.

Any idead what could be causing it?
Running a 1150 socket so really dont wanna buy a new outdated mobo..

RAM: 16Gb Corsair Vengeance DDR3
CPU: 1150 I7 4790K
CPU Cooler: Corsair H115i pro
GPU: 2x GTX 760
Mobo: Asus Maximus VII Hero
PSU: Corsair 850w (forget which one but gold rated
3x case fans
3x hard drives (SSD, HDD, SSHD)

 

[rocktalkrock]

1. Is there any dirt in the 1st x16 slot preventing a proper connection?
2. What is the Graphics Configuration in the Advanced section of the BIOS?

Graphics Configuration
Allows you to select a primary display from iGPU, and PCIe graphical devices.

Primary Display [Auto]
[Auto] The primary display will be set to PCI-E when a PCI-E graphic card is detected.
[CPU Graphics] Force the primary display to be from the CPU Graphics.
[PCIE] Force the primary display to be from the PCI-E graphic cards.

 

[snail915]

I've tried checking / clearing the PCI slot, can't see any dirt or debris and I cant see any bent or damaged pins either.

As for Bios, if I use PCI Slot 2 it runs off the PCI slot but if I use PCI Slot 1 it reverts to onboard graphics.
I can use PCI 2 and onboard at once but cant use PCI 1.

I tried it as PCI-E and Auto.

 

[rocktalkrock]

Do you have SLI enabled in the NVIDIA Control Panel?

Make sure SLI is actually enabled in NVIDIA's Display Properties. Look for the "Set SLI Configuration and PhysX Configuration" or similar panel and enable this option.

 

[snail915]

Thanks for your help rock,

It seems when reinstalling the cpu despite being careful I had bent a pin. After performing what can only be described as open heart surgery on my PC I have now got full function in my PCI-e slots!

There was also some dirt around the PCI-e slot hence you got marked as the solution.