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Problems with enabling SLI?

post #1 of 2
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I've seen this multiple times across the web regarding some people having issue with enabling SLI with certain motherboards. Browsing good old Youtube i found this guy that seems to have discovered the cause and it's both a motherboard & recent Nvidia Driver issue.

He was facing issues enabling SLI on MSI Z68A-GD65 (B3) with his 2x GTX 580's. Turns out due to the primary card being in x8 mode with this particular board, recent Nvidia drivers do not take kindly to this and for some reason only recognise x16 for use with the primary card when in SLI. Because of this SLI cannot be enabled without reverting to older drivers or buying a new motherboard with x16 capabilties in the primary slot when in SLI.

Note: x16 mode is possible with a single GPU, but we're talking about SLI modes of x8 x8. And the slower mode for the primary card is the issue. Before anyone says anything smile.gif

Anyhow here's the vid of his findings, be sure to post feedback if you are experiencing the same issue and i hope it resolves things for you.

http://www.youtube.com/watch?v=zPyNGsNakX8&feature=channel_video_title


Anyway hope this helps...
 
X79 Build
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X79 Build
(13 items)
 
 
CPUMotherboardGraphicsRAM
Intel Core i7-6950X @ 4.0Ghz Asus Rampage V Extreme [Bios:3101] 2x EVGA GeForce Titan X SC Editions in SLI 32GB (4×8) Corsair Dominator Platinums (3000Mhz) 
Hard DriveHard DriveHard DriveOptical Drive
Samsung 950 Pro 512GB M.2 Nvme 2x 256GB Vertex 4 SSD (RAID-0) 2x 2TB Seagate Barracuda [Storage] Pioneer BDR-207DBK Blu-ray Writer 
CoolingOSMonitorPower
Corsair H105 (Push/Pull) Windows 10 Pro x64 2x 27" Asus PG278Q ROG Swift 144hz  Corsair AX1500i Digital ATX 80 Plus Titanium 
CaseAudio
Lian Li PC-O8WX ATX Cube Case Logitech Z906 5.1 Surround 
CPUMotherboardGraphicsRAM
i7-3930K (C2) @ (4.6Ghz) Asus Rampage IV Extreme X79 (Bios 3204) 3x EVGA GTX780Ti's SC Editions 32GB (4x8GB) G-Skill TridentX 2400Mhz 
Hard DriveHard DriveOptical DriveCooling
2x 256GB OCZ Vertex 4's (RAID-0) 2x 2TB Seagate Barracuda 7200.14 64MB Cache Pioneer BDR-207DBK Blu-ray Writer Corsair H105 (Push/Pull) 
OSMonitorPowerCase
Win7 Pro 64Bit & Win10 Pro 64Bit Asus ROG Swift (2560x1440 @144hz) Corsair AX1200 + Corsair RED sleeved cables Coolermaster Cosmos II Ultra 
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post #2 of 2
I had problems enabling SLI with two different GTX570's(reference and DCII) on a Asus P8P67-Deluxe. After many weeks with troubleshooting and headakes I found out that it was Windows 7 SP1 that was the reason for my problems. With some drivers the "maximize 3D performance"-option didn't even show up in Nvidia Controlpanel, and when it did the driver went bananas when I hit the button.

Anyways, I reinstalled windows without SP1 and SLI worked like a charm.
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Money drainer II
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Intel i7 2600k Asus P8P67-Deluxe GTX570 SLI 8GB Corsair XMS3 1600Mhz 
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120GB Corsair F120 SSD & 1GB Samsung SP F3 CPU Block: EK HF Supreme CPU GPU Block: 2x EK HF Supreme GPU Pump: Iwaki RD-20 
CoolingCoolingCoolingOS
Rad: BIGTX360 & Coolgate 120 Controller: Aquaero 5 Pro Fans: GT AP-15 P/P Win7 64 Ultimate 
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Benq GL2750 QPAD MK-80 Corsair AX850W Corsair Obsidian 800D 
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