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Second 7850 will only run at 4x!

post #1 of 4
Thread Starter 
Sup folks, I'm in a bind here. I just revved up GPU-Z and notived my second 7850 is only running PCI-e 4x. My motherboard has 3 PCI-e 16x slots that can support running at 16x/16x (Sabertooth 990FX R2.0 from Asus). I'm guessing I'm just not using the CORRECT 2 PCI-e 16x slots, but I'd like a little input before I rip open my case.
post #2 of 4
Look in you mobo manual. It is likely you are using a 4x slot.
    
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CPUMotherboardGraphicsRAM
1055T @ 3.5ghz GA-990XA-UD3 xfx 6850 crossfire 940/1150 @ 1.181v 2133mhz G skill 2x4gig 
Hard DriveOptical DriveCoolingOS
500gb + 250gb DVD drive Cooler master Hyper TX3 Win 7 
MonitorKeyboardPowerCase
23.6'' Asus HDMI + 17'' NEC  Microsoft 750W OCZ Antec 
MouseMouse PadAudio
optical none Microsoft life chat 3000 
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post #3 of 4
Both Tan 16x Slots are full 16x the brown bottom is 4x make sure your second card is in the second tan slot, if it is then check the manual and bios.
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JunkoXan's Build
(15 items)
 
   
CPUMotherboardGraphicsRAM
Intel 2700k (Engineering Sample) Asus P67 Sabertooth Sapphire Dual-X 280x G.Skill Sniper (2x4gb) 
Hard DriveCoolingOSMonitor
Samsung F3 Spinpoint Cooler Masters 616+ Windows 7 Upstar 20" 1080p TV 
MonitorKeyboardPowerCase
Dell Monitor 21" 1680x1050 Dell Keyboard Antec High Current Gamer 900W Cooler Master HAF-XB 
MouseMouse Pad
E-3lue Mazer II 2600DPI Optical Mouse Custom Made 
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post #4 of 4
Thread Starter 
Hey, thanks for the input. I put the second card in the second Tan slot (yeah, I was using the 4x slot previously like the noob I am). And now I've run into a different issue, my primary card stopped running at 16x (top slot) and is instead running at 8x. Now, I don't know if it is my top or bottom graphics card, it's the top card in the drop down in GPU-Z. So now I'm, as far as I can tell, running at Primary 8x Secondary 16x. Once again, thanks for the input. Also, after going through each and every possible section on my Bios was there no where to manually change the PCI-E slots settings. Only thing remotely related to the PCI-E slot was a setting in regards to over clocking (enable/disable safety).
Edited by Zutaradimus - 9/12/13 at 9:51pm
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