Works with crossfire only board! This app/thread saved me from having to buy a new motherboard, the least I can do is post the results! Working with the following specs below. In my experience I found the below steps to also help as far as installation is concerned. Good luck! AMD Phenom II X6 1055T 2.8Ghz 4GB DDR3 1333Mhz Gigabyte GA-890GPA-UD3H - Crossfire only compatible motherboard (but works like a charm in SLI!) 2X Nvidia/EVGA 460 GTX 1GB's Nvidia 310.90 Drivers HyperSLI 0.96 Windows 7 x64 Home Premium OEM EVGA Precision for Fan control 1. Perform a clean install of latest Nvidia Drivers (I tested the 306.97, 310.70 and 310.90 - 306.97 worked but random crashes in certain games, 310.70 did not, 310.90 works the best, no issues) 2. Reboot 3. Install HyperSLI 0.96 4. Reboot into newly created HyperSLI boot menu option 5. HyperSLI finishes installation 6. Reboot into HyperSLI boot menu from here on out 7. Open Nvidia control panel and enable SLI 8. Enjoy! NOTE: You will also notice the HyperSLI icon running in the task-bar. You can open HyperSLI and change between 2 settings. Enable Hardware based SLI, or Software based SLI if you are experiencing some issues. If you boot back into your normal boot menu after HyperSLI is installed, it can break HyperSLI! HyperSLI doesn't run under your default Windows Boot option (Windows XXX). You must boot to the "Windows XXX HyperSLI" option in order to use HyperSLI after it's installed. Games Tested: Farcry 3 - Highest settings, no issues Battlefield 3 - Used Nvidia's recommended settings for SLI 460's - Average 45-50 FPS Tom Clancy's Ghost Recon - Highest Settings, no issues Benchmarks: Heaven DX11 - Highest settings, no issues 3D Mark 06 Pro - Highest settings, no issues Lastly, a huge THANK YOU to the developers, programmers, testers, basically anyone who made this happen! Great job guys! Couldn't be more pleased with the results!