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Can I force my x16 pcie slot to run at x4 speed?

post #1 of 3
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I have just got my 2nd card to crossfire with my first 6850 and I have run into a bit of trouble with micro stutter. I expected this because my 2nd PCIE slot is an x4 and my first is an x16. I expected the x16 slot to automatically downclock into an x4 when the second card was put in but it didn't. Is there a way to force my x16 slot down to x4 speeds? Hopefully this will help with micro stutter.
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The Sleeper
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Sony Xperia Z3
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CPUMotherboardGraphicsGraphics
AMD FX 8320  Asus Sabertooth 990FX R2.0 MSI Radeon 7950 MSI Radeon 7950 
RAMHard DriveCoolingOS
8GB Crucial Ballistix Sport 1600mhz Samsung 470 SSD Corsair H80i Windows 7 64 Bit Home Premium 
PowerCase
Corsair HX850 Coolermaster HAF 932 
CPUMotherboardGraphicsRAM
Intel SU7300 Core2Duo 1.6 Ghz Alienware OEM Nvidia 335m 8 GB PNY memory 
Hard DriveOSMonitor
Samsing 840 SSD Windows 7 Home Premium 64-Bit Generic PNP monitor @ 75hz 
CPUGraphicsRAMHard Drive
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Blow on it Android 4.4.4 1920x1080 LCD 
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post #2 of 3
Does not work like that. It is better at x16 as it gives more bandwidth. the problem it the X4 slot being slow.
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post #3 of 3
No you cannot force it.
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