Guys, I'm beginning to freak out a little. Just bought a GTX680 SLI setup for my rig but it's not working. Rig: - i7 3960X - 2x GTX680 - Rampage 4 Extreme - XFX 1000w Platinium PSU What's the trouble? When I want to activate SLI I'm getting this error after 30 seconds and my drivers are screwed and needs reinstalling: http://i42.tinypic.com/sytsol.jpg Gebeurtenisnaam van probleem: APPCRASH Naam van de toepassing: nvcplui.exe Versie van toepassing: 4.4.730.0 Tijdstempel van toepassing: 4f7c06da Naam van foutmodule: nvgames.dll Versie van foutmodule: 220.127.116.11 Tijdstempel van foutmodule: 4f64ed1d Uitzonderingscode: c0000005 Uitzonderingsmarge: 00000000000a9677 Versie van besturingssysteem: 6.1.7600.2.0.0.256.1 Landinstelling-id: 1043 Aanvullende informatie 1: c1ae Aanvullende informatie 2: c1ae4f18096e23e1cda4b14ad816e8f6 Aanvullende informatie 3: 1e82 Aanvullende informatie 4: 1e8288df56a6872aadf8754f7ce56935 List things I tried: - Tested the cards seperately, work fine! - Update bios REX4 to latest! - Tested 3 drivers, WHQL 301.10, Beta 301.24, Beta 301.25! - Before placing the cards I deinstalled the software, rebooted the system, placed 1 card, booted in safe mode, used driversweeper, rebooted again. Installed the driver, rebooted, installed the second card + SLI connector, bootup and put on SLI. - Used 2 way and 3 way SLI connectors, no difference! - Placed the cards in different slots, no difference! - Used CCleaner to clean errors, no difference! The only thing that made a difference was this: To explain further. NVCPlUI.exe used to be in Windows\System32 directory, it's now in C:\Program Files\NVIDIA Corporation\Control Panel Client. If you really want to run the PhysX cp from within control panel then copy NVCPlUI.exe into System32 directory and it will run I did that, now my AppCrash turned into a AppHang. I can reboot the system without having to reinstall the drivers again. But, it's still not enabling SLI. Looks like a software problem. Anybody recognise this? I really want to put the SLI on these baby's! Thanks guys!