Running SLI Causes Windows 10 pr x64 to freeze/reboot

pen-xv

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Jan 26, 2016
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I just installed a second PNY Geforce 950 card to run in SLI. Both cards run just fine on their own. When I plug the second in, and enable SLI in Nvidia control panel, the image shuts down, and windows restarts. I can get back into Windows only if I disconnect the second graphics card. I have tried two PSUs (one 700w, the other 750) and get the exact same behavior. It's a brand new clean install of Windows 10. I'm wondering if there's not a BIOS setting that I need to play with. Any thoughts?

MB: EVGA nForce 780i SLI
CPU: Xeon x5450
PSU: Corsair CX750
Ram: 8 Gb Corsair XMS2 DDR2 800 MHz
OS: Windows 10 Pro x64