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GTX670 Tri-SLI Issue - Need some suggestions

post #1 of 3
Thread Starter 
Ok, I have three GTX670's and when I run all three in SLI during 3DMark Vantage benching I get two interesting issues:

1 - My score from 2 way to 3 way SLI goes from 48k to 51k, so not a big jump, whereas my score from single to 2 way SLI goes from 35K to 48K.

2 - During one of the Featured benchmarks, the one that looks like you are scanning across a moon's surface, in three way I get what looks like stuttering where the picture is somewhat distorted, but with 2 way SLI it is smooth. This happens whether I am overclocking the cards or not.

My system is as follows:

3770k @ 4.8Ghz
Fully water cooled
Gigabyte Sniper 3 MB
Intel 320 SSD
16Gb of Corsair Platinum ram @ 1866Mhz

I have the latest drivers, but for the life of me I can not figure out what is going on. The GTX670's are all PNY models with 2Gb ram and as said before, this happens whether I am overclocking the cards or not. Any suggestions?
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Gaming Rig
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New Custom Case
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CPUMotherboardGraphicsGraphics
8350 Asus 990fx Sabertooth Diamond hd7970 Diamond HD7970 
RAMHard DriveHard DriveHard Drive
Gskill Ripjaws OCZ Agility 3  2Tb Seagate Sata3 3Tb Western Digital Green Drive 
Optical DriveCoolingCoolingCooling
LG Bluray Burner Swiftech HD Koolance MVR-100 Koolance CHC-125 
CoolingCoolingCoolingOS
Swiftech MC35x2 with dual top Feser Triple 120 Radiator Corsair SP120 Quiet x 3 Windows 7 Ultimate x64 
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Corsair AX750 CaseLabs M8 
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post #2 of 3
check to make sure all the bios number are the same on each card, also test each card individually, run benches with each card and see if one of the cards is giving you a low sore compared to the others. finally, rearrange the order of the cards on the mobo. see if any of that makes a difference.
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post #3 of 3
Thread Starter 
The bios number is different on one of the cards, but that card and one of the other cards are the ones that run fine when in two way SLI. The third card is a different PCB, with different chokes and such, but I would have thought that even at stock I would not have the issue. I will try rearranging the cards to see if that makes any difference.
Gaming Rig
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New Custom Case
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CPUMotherboardGraphicsGraphics
8350 Asus 990fx Sabertooth Diamond hd7970 Diamond HD7970 
RAMHard DriveHard DriveHard Drive
Gskill Ripjaws OCZ Agility 3  2Tb Seagate Sata3 3Tb Western Digital Green Drive 
Optical DriveCoolingCoolingCooling
LG Bluray Burner Swiftech HD Koolance MVR-100 Koolance CHC-125 
CoolingCoolingCoolingOS
Swiftech MC35x2 with dual top Feser Triple 120 Radiator Corsair SP120 Quiet x 3 Windows 7 Ultimate x64 
PowerCase
Corsair AX750 CaseLabs M8 
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Gaming Rig
(19 items)
 
 
New Custom Case
(3 photos)
CPUMotherboardGraphicsGraphics
8350 Asus 990fx Sabertooth Diamond hd7970 Diamond HD7970 
RAMHard DriveHard DriveHard Drive
Gskill Ripjaws OCZ Agility 3  2Tb Seagate Sata3 3Tb Western Digital Green Drive 
Optical DriveCoolingCoolingCooling
LG Bluray Burner Swiftech HD Koolance MVR-100 Koolance CHC-125 
CoolingCoolingCoolingOS
Swiftech MC35x2 with dual top Feser Triple 120 Radiator Corsair SP120 Quiet x 3 Windows 7 Ultimate x64 
PowerCase
Corsair AX750 CaseLabs M8 
  hide details  
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