I know this might sound so often lately. The problem is that SLI option is not showing on my nVidia panel.
Gigabyte Z87X-UD3H [New] (F6 Bios)
i5 4670k [New] (@ 4,5 Ghz)
2x Asus GTX 660 OC (non Ti)
PSU Corsair TX850M
Corsair Vengeance 8Gig (@1.8Ghz)
What I have done:
- Run Asus Gpu Tweak to see the BIOS GPU-Z (No need for updates for both)
- Switch both GTX by PCIe slots (fine)
- Run separately on the 1st PCIe x16 (both GTX are running fine)
- Uninstall driver and using Driver Sweeper (no difference after clear Install)
- Plug in the SLI bridge (upside down vice versa
- Plugin the SATA power on near the PCIe slot
- Downgrade driver to 310 (no difference)
- Disabling integrated GPU
Can anyone tell me how to see if the 2nd PCIe is being populated in BIOS mode?
You could try removing the Nvidia drivers, then reinstall them with only one card installed. Reboot, shutdown, then install the second card and start the computer.
SLI can be tricky to get working, my friend had an issue where he could not enable SLI because the SLI section in NCP was showing a small . instead of SLI and Physx. It still worked but he had to click the dot to get it to access the SLI menu! very strange
Solved... It seems the problem is due to an unbalanced position of the card against the PCIe slot (my guess due to slightly uneven Mobo to chassis). Also that might be a solution is that the additional power port near the PCIe is not sufficient enough (try to connect it directly to PSU), and Update to the latest BIOS...
So for those who have the same problem as mine, try to build your system outside the case first, make sure all the system works flawlessly. Then you can start assemble them inside the case. Perhaps this gen3 PCIe slot are quite sensitive, I would also suggest a physical revision of the slot otherwise a rigid back plate on the GPU will be necessary...