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Crossfire problem

post #1 of 3
Thread Starter 
I have MSI AB and have unofficialoverclocking = 2

If I overclock both my AMD 7950 to 1100core 1575memory then it works perfectly and even in windows 7 the core and memory clocks stay at 1100/1575.

If I however put clocks to 810/1250 in MSI AB then in windows 7 main card is 500 core and second card is 300 core.

then if I start a game the main card has 100% gpu load and the second card has 30% load, then game freezes and I have to turn off PC from powerbutton.
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post #2 of 3
well it is just logical for both to be running at the same speed for crossfire to work

if either card is out of sync in speed, then the other card will overload and crash as you already seen it happen.


make note, not all games are crossfire compatible, specially those that plays in a Windows frame

only Full screen games can use crossfire

non crossfire compatible games will only load from the main card, regardless if the 2nd cad is active or not.
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CMU32GX4M2C3200C16R CMU32GX4M2A2666C16 OCZ Vertex 4 Seagate ST8000NM0055 
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LED 3mm TWIN ULTRA WHITE LED 5mm TWIN ULTRA WHITE EK-AF Ball Valve (10mm) G1/4 - Black Nickel EK-D5 PWM G2 Motor (12V DC PWM Pump Motor) 
CoolingCoolingCoolingCooling
EK-HD PETG Tube 12/16mm 1000mm (8pcs) EK-HDC Fitting 16mm G1/4 - Red EK-ACF Fitting 12/16mm - Red TUBE PrimoChill PrimoFlex Advanced LRT 15,9 / 1... 
CoolingCoolingCoolingCooling
QD3-MSG4-BK QD3-FSG4-BK EK-CoolStream PE 240 (Dual) EK-CoolStream XE 360 (Triple) 
CoolingCoolingCoolingCooling
EK-XTOP Revo D5 PWM - Plexi (incl. pump) EK-Supremacy EVO - Nickel EK-FC Terminal TRIPLE Parallel - Plexi EK-FC Terminal BLANK Parallel 
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post #3 of 3
Thread Starter 
Quote:
Originally Posted by AllGamer View Post

well it is just logical for both to be running at the same speed for crossfire to work
if either card is out of sync in speed, then the other card will overload and crash as you already seen it happen.
make note, not all games are crossfire compatible, specially those that plays in a Windows frame
only Full screen games can use crossfire
non crossfire compatible games will only load from the main card, regardless if the 2nd cad is active or not.

The games supports crossfire as I said it works flawless with 1100/1575 but when having stock speed then downlock kicks in and the main card has 100% gpu load and second gpu only has 30% gpu load.

With 1100/1575 both cards have even gpu load.
Gaming Rig
(15 items)
 
  
CPUMotherboardGraphicsRAM
I7 5820k Stock clocks Gigabyte X99 UD4 2x EVGA GTX 1080 FE SLI  Corsair 64GB (4x16GB) DDR4 2133MHz CL13 Vengean... 
Hard DriveCoolingOSMonitor
Intel 530 M.2 SSD 180GB OS + Samsung 850 EVO st... Mugen 4 push pull Win 7 64bit home prem Acer 27" XG270HU 144hz TN + LG Oled 4k TV 
PowerCaseMouseMouse Pad
EVGA T2 1600W Fractal XL R2 CM Xornet Steelseries Qck+ 45cm black 
Audio
Sennheiser RS185 wireless headphones 
  hide details  
Reply
Gaming Rig
(15 items)
 
  
CPUMotherboardGraphicsRAM
I7 5820k Stock clocks Gigabyte X99 UD4 2x EVGA GTX 1080 FE SLI  Corsair 64GB (4x16GB) DDR4 2133MHz CL13 Vengean... 
Hard DriveCoolingOSMonitor
Intel 530 M.2 SSD 180GB OS + Samsung 850 EVO st... Mugen 4 push pull Win 7 64bit home prem Acer 27" XG270HU 144hz TN + LG Oled 4k TV 
PowerCaseMouseMouse Pad
EVGA T2 1600W Fractal XL R2 CM Xornet Steelseries Qck+ 45cm black 
Audio
Sennheiser RS185 wireless headphones 
  hide details  
Reply
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