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OpenCL and 4 Graphics cards on one mobo

post #1 of 3
Thread Starter 
Okay I have this mobo: http://www.newegg.com/Product/Produc...82E16813130274

and Im trying to get 4 Radeon GPUs running for OpenCL

with only 3 GPU everything is fine, but slower (rendering)

with the 4th GPU, nothing launches. Starting GPUz throws out an "openCL bug was detected"

Whats going on here? How do I get the 4th GPU working?
 
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post #2 of 3
Whats the forth gpu? I see you have a gtx 460 and 5970. You can't crossfire a 5970 and a gtx 460, so that might be a problem.
    
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post #3 of 3
Thread Starter 
I said they were 4 Radeon GPUs.. god damn that was condescending...
I start with 3 HD6870, everything works fine
I add HD6870 #4 and nothing works anymore

3 6870s=works
4 6870s=broken

dedicated rig not listed in my sig
AMD MSI 890FXA
1kw psu
 
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CPUMotherboardGraphicsGraphics
AMD Phenom 9950 Black Edition Gigabyte mATX Galaxy Ge-Force GTX460 1GB Radeon HD3200 
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Media Server
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Various snapshots
(3 photos)
CPUMotherboardGraphicsRAM
Intel Core i7 920 @ 4.2Ghz DFI Lanparty UT X58 T3eh8 XFX Radeon HD 6990 4GB G.Skill Pi Series 
RAMHard DriveHard DriveOptical Drive
Mushkin Enhanced Intel 510 Series 250GB SSD Seagate 1.5TB 7200RPM  Sony External USB DVD Combo Drive 
OSMonitorMonitorMonitor
Windows 7 Enterprise 64-bit ASUS VH238H Dell E207WFPc Samsung PN58B650 
KeyboardPowerCaseMouse
Razer Blackwidow Ultimate Corsair AX 1200 Custom MountainMods Monticle 24 w/Acoustics & LCS Logitech G500 
Mouse PadAudioAudio
Razer Destructor Ultrasone H-Fi 780 Custom built up 5.1 surround sound  
CPUMotherboardGraphicsGraphics
AMD Phenom 9950 Black Edition Gigabyte mATX Galaxy Ge-Force GTX460 1GB Radeon HD3200 
RAMHard DriveHard DriveCooling
6GB DDR2 (2x2GB Patriot+2x1GB G.Skill) Western Digital Caviar Black Western Digital Caviar Green Cooler Master GeminII 
OSMonitorKeyboardPower
Windows 7 Home Server Samsung PN58B650  Logitech Dinovo Mini Silverstone 350W 
CaseMouse
Antec Veralis Logitech Dinovo Mini 
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