Did you updated all your drivers on win 7 before doing windows 10 upgrade?
Because, my first time that i tried to install windows 10 i get stucked at 75% for more than 8 hours so i decided to turn the computer off. A week later i decided to give it another chance, and I am on my 4th day of running win 10 now.
I did not what went wrong the first time, but the only thing that i did, was to install 355.60 nvidia driver on win 7 and run the upgrade to win 10
Right now the nvidia driver that windows 10 installed by default was the previous one, 353.62 and I cant install the driver 355.60 But i am running win 10
Could be your SLI configuration. Dont know, let's wait what other people have to say about your case.
CPU: i5-3570k @ 4.400GHz. RAM: G. Skill Trident X @ 2400MHz CL10 (4x4GB) 10-12-12-31-2 MOBO: Maximus V Gene. BIOS:1903 CASE: Corsair Obsidian 800D. CPU COOLER: Thermaltake Water 3.0 Ultimate with 3 Noctua Fans NF-F12 industrial PPC-3000 PWM SSD: 2 x 256Gb Plextor M6S in RAID 0 HDD: 1 x 2Tb WD20EARX. PSU: Corsair Gold AX850 GPU: msi GTX 680 Twin Frozr iii OC 2gb GDDR5 Monitor: BenQ XL2410T. HEADSET: CM Storm Sirus 5.1 OS: Win 10 Pro 64 bits