Overclock.net › Forums › Graphics Cards › AMD/ATI › 7950 crossfire bottom card stuck at 300/150
New Posts  All Forums:Forum Nav:

7950 crossfire bottom card stuck at 300/150

post #1 of 151
Thread Starter 
So I just got a Sapphire Dual-x 7950 to crossfire with my MSI TFIII 7950. They are BOTH boost versions. The clocks were jumping so I tried flashing non-boost BIOS's on both cards, but long story short it was a horrible mess and I successfully flashed back to the original BIOS's. Now my secondary card (the one on the bottom) is stuck at clock speeds of 300/150. My primary card idles at 300/150 and when I start a benchmark it goes to the normal 960/1250 with 99% load while the secondary has a 0% gpu load and runs at 300/150. I have tried uninstalling the drivers and then running Atiman Uninstaller. I have also tried swapping the cards around and re-installing the drivers with no luck. Also tried every combination of BIOS switches and you guessed it, no luck. Crossfired is enabled. This is my first time crossfiring and it is absolutely horrible. This has been a nightmare I haven't been sleeping just staying up and trying to figure this out because I just want to actually USE the cards, but I can't.......

I'm staring at my Crysis 3 game case and weeping. I want to play it SO bad!

Any help would be GREATLY appreciated.
Edited by RavageTheEarth - 2/28/13 at 11:06pm
post #2 of 151
Thread Starter 
I just spent an hour re-installing windows and I am still having the same problem. I didn't install any overclocking programs and overdrive is disabled. Looks like I'm gonna have another night of no sleep.
post #3 of 151
Thread Starter 
So I tested both cards individually and it looks like the problem is when there is a scond card plugged into the 8x lane. My MOBO is an Asrock z77 extreme4 if that means anything.
post #4 of 151
Thread Starter 
I also have options in my BIOS for Share memory, IGPU Multi-monitor, Render Standby,and Deep Render Standby. idk what they are for
post #5 of 151
I'm no expert, but isn't it just that the 8x lane doesn't have the bandwidth to handle higher clocks?
Like I said, I'm no expert...

Planning on CrossFireing my XFX 7950 BE next month for C3 also. smile.gif

Good luck!
Construct
(18 items)
 
Behemoth
(15 items)
 
 
CPUMotherboardGraphicsGraphics
AMD FX-8350 ASUS Crosshair V Formula-Z Asus GTX 980 Strix XFX Radeon R9 190 Black Edition (HD 7950) 
RAMHard DriveHard DriveHard Drive
Kingston HyperX Beast (2x8GB) Samsung 840 HGST Deskstar NAS Western Digital Caviar Black 
Optical DriveCoolingOSMonitor
SilverStone Slim DVD Drive Corsair H80i Windows 8.1 Pro Asus PB278Q 
KeyboardPowerCaseMouse
Logitech G710+ Corsair AX760i Silverstone Fortress FT02 Logitech G9X 
Mouse PadAudio
Corsair MM600 Bose Companion II 
CPUMotherboardGraphicsRAM
AMD Phenom II X4 925e Asus M3A32-MVP DELUXE ATI Radeon HD 4870X2 Generic DDR2 PC2-6400 
Hard DriveOptical DriveCoolingOS
Seagate ST3500620AS HL-DT-ST DVD-RAM GH22NP20 Generic OEM Low profile CPU Cooler Windows 7 Ultimate (64-bit) (Upgraded in Januar... 
MonitorKeyboardPowerCase
Dell S199WFP (19' - 1440x900) Generic Logitech Keyboard Corsair TX750 (rev. 1) Alienware Aurora R5 
MouseMouse PadAudio
Generic Logitech Mouse Alienware Mouspad Old 2.1 Speaker System 
  hide details  
Reply
Construct
(18 items)
 
Behemoth
(15 items)
 
 
CPUMotherboardGraphicsGraphics
AMD FX-8350 ASUS Crosshair V Formula-Z Asus GTX 980 Strix XFX Radeon R9 190 Black Edition (HD 7950) 
RAMHard DriveHard DriveHard Drive
Kingston HyperX Beast (2x8GB) Samsung 840 HGST Deskstar NAS Western Digital Caviar Black 
Optical DriveCoolingOSMonitor
SilverStone Slim DVD Drive Corsair H80i Windows 8.1 Pro Asus PB278Q 
KeyboardPowerCaseMouse
Logitech G710+ Corsair AX760i Silverstone Fortress FT02 Logitech G9X 
Mouse PadAudio
Corsair MM600 Bose Companion II 
CPUMotherboardGraphicsRAM
AMD Phenom II X4 925e Asus M3A32-MVP DELUXE ATI Radeon HD 4870X2 Generic DDR2 PC2-6400 
Hard DriveOptical DriveCoolingOS
Seagate ST3500620AS HL-DT-ST DVD-RAM GH22NP20 Generic OEM Low profile CPU Cooler Windows 7 Ultimate (64-bit) (Upgraded in Januar... 
MonitorKeyboardPowerCase
Dell S199WFP (19' - 1440x900) Generic Logitech Keyboard Corsair TX750 (rev. 1) Alienware Aurora R5 
MouseMouse PadAudio
Generic Logitech Mouse Alienware Mouspad Old 2.1 Speaker System 
  hide details  
Reply
post #6 of 151
Thread Starter 
I'm pretty sure that when crossfired both lane go to 8x so they should be even, but I'm no expert either.
post #7 of 151
Thread Starter 
This makes absolutely no sense. I had it working yesterday and now it just doesn't work. If I try to flash any BIOS besides the originals on either card I BSOD. Im about to return these cards and just go 680 SLI
post #8 of 151
Thread Starter 
Here is the BSOD that I get. Does anyone know what this means?

post #9 of 151
Thread Starter 
I'm thinking of RMA'ing the Sapphire tomorrow, but I dont know if that is what the problem is because the MSI has 0% GPU load when it is the bottom card also. So PO'd right now. Ive been up for 36hours trying to figure this out. I guess I should get a little sleep and get back to it in a couple hours.
post #10 of 151
what are you using to measure the clock speeds? when the crossfired card is not used it shuts down(amd zerocore) i noticed that that causes some measure programs to hang on that card(gpu-z and sometimes MSI AB), try restarting the software while the 2nd gpu is under load.
...
(18 items)
 
   
CPUMotherboardGraphicsRAM
Intel Core i5 760 Asus P7p55d-e LX(RMA) MSI Nvidia 9800gtx+ Corsair dominator 2x2gb 1600mhz 7-7-7-18  
Hard DriveCoolingOSPower
Samsung 500gb Stock Windows/Linux 650W 
  hide details  
Reply
...
(18 items)
 
   
CPUMotherboardGraphicsRAM
Intel Core i5 760 Asus P7p55d-e LX(RMA) MSI Nvidia 9800gtx+ Corsair dominator 2x2gb 1600mhz 7-7-7-18  
Hard DriveCoolingOSPower
Samsung 500gb Stock Windows/Linux 650W 
  hide details  
Reply
New Posts  All Forums:Forum Nav:
  Return Home
  Back to Forum: AMD/ATI
Overclock.net › Forums › Graphics Cards › AMD/ATI › 7950 crossfire bottom card stuck at 300/150