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GTX 660ti SLI not working

post #1 of 4
Thread Starter 
So, I have two 660ti cards. EVGA GeForce GTX 660Ti 3GB PhysX CUDA and ZOTAC GeForce GTX 660Ti 2GB AMP. I know it's supposed to be a hassle when using cards with different vram, but I didn't think it would be this hard. I manage to activate SLI in Nvidia control panel, but as soon as I boot up a game or anything else which uses the GPU (Windows Experience Index) the screen goes black and the driver crashes. At first I had the 2gb card in PCI slot 2, I wasn't able to activate physX then, so I tried switching slots and then I was able to activate it (screen went black for 15 seconds when activating though).

Things I know and have tried:
Both PCI slots seem to be working because I can use card 2 for physx without problems.
Both cards work just just fine.
Tried to reinstall the driver a million times.

Specs:
IntelĀ® Core i7-3770K Processor
Kingston HyperX 3K SSD 240GB 2.5"
ASUS Maximus V Formula, Socket-1155
Corsair Dominator DHX DDR3 1600MHz 12GB
Corsair TX 850W PSU
Windows 7 Home Edition
post #2 of 4
You need to flash both cards with an identical bios.
Overkill
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i7 5820k @ 4.625Ghz ASUS Rampage V Extreme GTX 980 Ti SLI 32GB G.Skill RIPJAWS 3200Mhz CL14 
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Intel 750 400GB Samsung 850 Pro 512GB WD Black 4TB 7200RPM Hitachi 2TB 7200RPM 
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Corsair RM1000i SilverStone RV02 Razer DeathAdder 3G SMSL SD793-II PCM1793 DIR9001 DAC 
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Overkill
(17 items)
 
  
CPUMotherboardGraphicsRAM
i7 5820k @ 4.625Ghz ASUS Rampage V Extreme GTX 980 Ti SLI 32GB G.Skill RIPJAWS 3200Mhz CL14 
Hard DriveHard DriveHard DriveHard Drive
Intel 750 400GB Samsung 850 Pro 512GB WD Black 4TB 7200RPM Hitachi 2TB 7200RPM 
CoolingOSMonitorKeyboard
Corsair H80i GT Windows 10 Professional Acer Predator X34 3440x1440 100hz IPS Razer BlackWidow Stealth 2013 
PowerCaseMouseOther
Corsair RM1000i SilverStone RV02 Razer DeathAdder 3G SMSL SD793-II PCM1793 DIR9001 DAC 
Other
Sony MDR-XB500 Headphones 
  hide details  
Reply
post #3 of 4
Thread Starter 
Thanks! I read in another thread that this fixed an issue with identical cards, but I didn't manage to find the same bios version for my cards. Any help here?
post #4 of 4
You need to find a 2GB bios that works with both cards. I'd try using the bios from your 2GB card on your 3GB card first. Test it and see if it works correctly by itself first. If so, then try SLI.

As far as how to do the flashing, search for the threads about extracting and flashing 6xx bios.
Overkill
(17 items)
 
  
CPUMotherboardGraphicsRAM
i7 5820k @ 4.625Ghz ASUS Rampage V Extreme GTX 980 Ti SLI 32GB G.Skill RIPJAWS 3200Mhz CL14 
Hard DriveHard DriveHard DriveHard Drive
Intel 750 400GB Samsung 850 Pro 512GB WD Black 4TB 7200RPM Hitachi 2TB 7200RPM 
CoolingOSMonitorKeyboard
Corsair H80i GT Windows 10 Professional Acer Predator X34 3440x1440 100hz IPS Razer BlackWidow Stealth 2013 
PowerCaseMouseOther
Corsair RM1000i SilverStone RV02 Razer DeathAdder 3G SMSL SD793-II PCM1793 DIR9001 DAC 
Other
Sony MDR-XB500 Headphones 
  hide details  
Reply
Overkill
(17 items)
 
  
CPUMotherboardGraphicsRAM
i7 5820k @ 4.625Ghz ASUS Rampage V Extreme GTX 980 Ti SLI 32GB G.Skill RIPJAWS 3200Mhz CL14 
Hard DriveHard DriveHard DriveHard Drive
Intel 750 400GB Samsung 850 Pro 512GB WD Black 4TB 7200RPM Hitachi 2TB 7200RPM 
CoolingOSMonitorKeyboard
Corsair H80i GT Windows 10 Professional Acer Predator X34 3440x1440 100hz IPS Razer BlackWidow Stealth 2013 
PowerCaseMouseOther
Corsair RM1000i SilverStone RV02 Razer DeathAdder 3G SMSL SD793-II PCM1793 DIR9001 DAC 
Other
Sony MDR-XB500 Headphones 
  hide details  
Reply
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