SLI not working Properly

[thebestcameraman]

Hello LTT forums. I recently got a new Geforce GTX 960 to pair in SLI with my other GTX 960. I plugged it in and after a few minutes of troubleshooting with post issues I finally got a post and SLI Set up, but when I started playing games, I looked at the card's usage via MSI Afterburner and found that the GPU my monitor was plugged into was running fine while the other card was never exceeding 15% performance. I tested both individually and both work 100% fine on thier own. Both are GTX 960's with 2GB GDDR5 memory, both by MSI, Although one is a 100ME and the other an Afterburner (model #'s listed below because I know what i just said isn't super helpful). Don't have tons of experience with SLI, so I have no idea what to do. I ran a test on the GPU's with high load and found the GPU not directly plugged into the monitor was giving less than 15% performance according to MSI Afterburner. The other was around 95-100%, which was expected.

PC Specs:
CPU: Intel core I7 4790K @ 4.4 GHz (OverClocked at 4.5 GHz)

MB: ASRock Z97 Extreme4

GPU1: Geforce GTX 960 MSI 100ME (912-V320-022)
GPU2: Geforce GTX 960 MSI W/ Afterburner (912-V320-001)

RAM: 24GB DDR3 (yes it's more than I need I get it)

PSU: EVGA NEX750B (750 watts)
OS: Windows 10 64-Bit

 

note that both GPU's are at Factory Overclock Levels. CPU is overclocked at 4.5GHz (from 4.4). All Drivers are up-to-date.

Also, this is my first post on LTT Forums so Hello, World

 

[Belgarathian]

Jump into the control panel and look at the SLI enabled/disabled. Mine keeps resetting to disabled after every. freakin'. update. 

[thebestcameraman]

Jump into the control panel and look at the SLI enabled/disabled. Mine keeps resetting to disabled after every. freakin'. update. 

Did that before the tests. I agree its annoying, but it's not the issue. SLI is enabled.

[Belgarathian]

I would try a driver reinstall using using DDU (here) in safe boot to remove the old one. 

[thebestcameraman]

Bad things happened. So bad I'm typing this from my IPad.

So when I went to restart the PC in safe mode, after restarting the monitor would not display anything. The Monitor kept saying no input was detected. Tried with different monitor, same issue. Took out SLI bridge an plugged into AVI port on MB. Still nothing. Cleared CMOS, nothing. Will try now to remove a GPU and see if that does anything.

[thebestcameraman]

We have post!

So I removed the Afterburner card and monitor now receives input. Yay! Now need to figure out how to put the card back in and still get it to work. Will reply once that's working and I get drivers re-installed

[thebestcameraman]

Ok that took a lot longer than it should have.

Anyways, I reinstalled the Drivers and confirmed they were working, and we are still getting similar results as to earlier. Though I did learn it's probably best to set up your SLI with your main GPU, and not you secondary one (this is probably what gave me the post issues). I think though that it may be a power issue, and that not enough power is able to be given to the system to run the other card. Possibly?

Also, I did another test where I overloaded the graphics card to where I went from 60 FPS to 40 FPS. Still didn't show any improvements in the other GPU's performance. I'll come back tomorrow afternoon as I have school and I don't get enough sleep already.