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7950 Crossfire GPU1 runs @ bus speed 3.0 GPU2 runs at bus speed 2.0 and near 0% usage

post #1 of 6
Thread Starter 



So I have had nothing but problems with this new Crossfire setup. Let me first get this out of the way. This is a clean install of Windows 7. Drivers 13.2 beta 7 installed only once. Had both cards working for a little while before, but I had to replace my motherboard because of bent CPU pins and got a new one (same BIOS version as before) and re-installed Windows. Now the problems are back. Cards are MSI TFIII 7950 and Sapphire Dual-x 7950. the Sapphire is the newest card and since install has been nothing, but problems. Going to RMA on monday and just get another TFIII to crossfire. Both are boost cards.

Problem is GPU1 (MSI) is around 90-99% usage while the GPU2 (Sapphire) card always is at 0-20% usage. Even if I switch the cards it is always the bottom one that doesn't get much GPU usage. It can't be the MOBO because like I said it was just replaced and they both had the same problem. Same BIOS on both MOBO's, but on the first I was running v2.5 and flashed to v2.7 to try to fix it and the new one is already on v2.7. If you look at GPU-z The MSI runs at x8 3.0 while the Sapphire runs at x8 2.0 and sometimes fluctuates all the way down to 1.1. ULPS is disabled. I am STUMPED. I feel like these two cards just don't play well together. Going to return the Sapphire to newegg on monday and exchange for TFIII if I can't get this solved. Sucks, because when I did have it working it was awesome. Was getting 60-120fps in crysis 3 at max settings with 4x MSAA.

Bull!!

BTW I started the benchmark again right after both GPU's are at 0% usage.
post #2 of 6
well looks like your running it in windows mode that will not run the 2nd gpu.
SABERWOLF
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SABERWOLF
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XEON-WOLF
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CPUMotherboardGraphicsRAM
Intel Core i7-6800K MSI X99A GAMING PRO CARBON EVGA GTX 1080 FTW Hydro Copper G.SKILL TridentZ Series 
Hard DriveCoolingCoolingCooling
Samsung EVO 850 500 EK-SBAY Dual DDC 3.2 PWM Serial Alphacool NexXxoS ST30 Full Copper Radiator 360 Hardware Labs Black Ice SR2 Multiport Black Car... 
CoolingCoolingOSMonitor
EK-CoolStream RAD XTC 420 koolance 380i Windows 10 Pro ASUS VW246H Black 24" 2ms 
PowerCaseMouseAudio
SeaSonic M12D SS-850 850W  Thermaltake core x71 CM Storm Sentinel Advance II Corsair Void 
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X5675@4400 1.344 ASUS P6X58D-E XfX RX480 RS F3-12800CL7T-6GBPI 6-7-6-21 1T 
RAMHard DriveHard DriveHard Drive
F3-12800CL9S-4GBRL WDC WD1001FALS-00J7B1 ST31000340AS WDC WD7500AAKS-00RBA0 
Hard DriveOptical DriveCoolingOS
Hitachi HDS723020BLA642 ihas 624-A SilverStone Heligon HE01 windows 10 64 Pro 
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post #3 of 6
Crossfire dont work with windows mode
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post #4 of 6
Thread Starter 
Wowwww I'm so StOopid. The funny thing is that I knew that. The good thing about this is that I ran the bench with a 0% power limit and my GPU usage stayed steady at 97-100% GPU usage on both cards at clocks of 1150/1600. That is the first time I'm seen that because when I run a 20% power limit my cards fluctuate usage from 60% to 100%.

Why is that?
post #5 of 6
Thread Starter 
and now back to the problem of why my voltage on both cards is stuck at 1.25v even at desktop.....
post #6 of 6
what are you overclocking with and if msi ab post a screen shot of settings tab if you have powerplay disabled the cards wont downclock or lower voltages i dont think.
SABERWOLF
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XEON-WOLF
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CPUMotherboardGraphicsRAM
Intel Core i7-6800K MSI X99A GAMING PRO CARBON EVGA GTX 1080 FTW Hydro Copper G.SKILL TridentZ Series 
Hard DriveCoolingCoolingCooling
Samsung EVO 850 500 EK-SBAY Dual DDC 3.2 PWM Serial Alphacool NexXxoS ST30 Full Copper Radiator 360 Hardware Labs Black Ice SR2 Multiport Black Car... 
CoolingCoolingOSMonitor
EK-CoolStream RAD XTC 420 koolance 380i Windows 10 Pro ASUS VW246H Black 24" 2ms 
PowerCaseMouseAudio
SeaSonic M12D SS-850 850W  Thermaltake core x71 CM Storm Sentinel Advance II Corsair Void 
CPUMotherboardGraphicsRAM
X5675@4400 1.344 ASUS P6X58D-E XfX RX480 RS F3-12800CL7T-6GBPI 6-7-6-21 1T 
RAMHard DriveHard DriveHard Drive
F3-12800CL9S-4GBRL WDC WD1001FALS-00J7B1 ST31000340AS WDC WD7500AAKS-00RBA0 
Hard DriveOptical DriveCoolingOS
Hitachi HDS723020BLA642 ihas 624-A SilverStone Heligon HE01 windows 10 64 Pro 
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Vizio 42inch lcd tv CORSAIR CMPSU-950TX Modded Rocketfish 
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SABERWOLF
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XEON-WOLF
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CPUMotherboardGraphicsRAM
Intel Core i7-6800K MSI X99A GAMING PRO CARBON EVGA GTX 1080 FTW Hydro Copper G.SKILL TridentZ Series 
Hard DriveCoolingCoolingCooling
Samsung EVO 850 500 EK-SBAY Dual DDC 3.2 PWM Serial Alphacool NexXxoS ST30 Full Copper Radiator 360 Hardware Labs Black Ice SR2 Multiport Black Car... 
CoolingCoolingOSMonitor
EK-CoolStream RAD XTC 420 koolance 380i Windows 10 Pro ASUS VW246H Black 24" 2ms 
PowerCaseMouseAudio
SeaSonic M12D SS-850 850W  Thermaltake core x71 CM Storm Sentinel Advance II Corsair Void 
CPUMotherboardGraphicsRAM
X5675@4400 1.344 ASUS P6X58D-E XfX RX480 RS F3-12800CL7T-6GBPI 6-7-6-21 1T 
RAMHard DriveHard DriveHard Drive
F3-12800CL9S-4GBRL WDC WD1001FALS-00J7B1 ST31000340AS WDC WD7500AAKS-00RBA0 
Hard DriveOptical DriveCoolingOS
Hitachi HDS723020BLA642 ihas 624-A SilverStone Heligon HE01 windows 10 64 Pro 
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Vizio 42inch lcd tv CORSAIR CMPSU-950TX Modded Rocketfish 
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