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6870 crossfire overclock questions

post #1 of 5
Thread Starter 
hi,

i've been trying to overclock my graphics card setup for a while, but i was wondering if i was doing it right.

first of all, ive been using catalyst control center to overclock them.i know i can switch between cards in catalyst control center, but i dont know how to test each card seperately(for example: furmark)

for the top card, im pretty sure i can just test that one by having furmark in windowed mode(so all the weight is being put on the first card). however, i dont know how to test the second card seperately and overclock it accurately( since i can only use the second card when furmark is in full screen mode, that means half its work is being done by the top card.)

any suggestions?
    
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CPUMotherboardGraphicsGraphics
i5 2500k @ 4.5 GHz 24/7 Asrock P67 extreme4 gen3 XFX radeon 6870 1gb HIS radeon 6870 1 GB 
RAMHard DriveOptical DriveCooling
4 GB G.Skill 3x seagate barracuda 500GB(2 in raid 0, 1 alone) some asus DVD/ CD + R drive Hyper 212+ in push/pull 
OSMonitorKeyboardPower
windows 7 Professional 64 - bit Hanns g 20" 16:9 monitor logitech illuminated keyboard corsair GS 700W 
CaseMouseMouse PadAudio
Silverstone FT02B G500 17" by 13" mouse pad Logitech S-220 17 Watts 2.1 Multimedia Speaker ... 
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post #2 of 5
Why would you want to use the cards separately?
    
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post #3 of 5
Thread Starter 
isnt that how you test them for their overclocks? i always assumed that you test each card seperately, and then test them together to see if they run stable with each other
    
CPUMotherboardGraphicsGraphics
i5 2500k @ 4.5 GHz 24/7 Asrock P67 extreme4 gen3 XFX radeon 6870 1gb HIS radeon 6870 1 GB 
RAMHard DriveOptical DriveCooling
4 GB G.Skill 3x seagate barracuda 500GB(2 in raid 0, 1 alone) some asus DVD/ CD + R drive Hyper 212+ in push/pull 
OSMonitorKeyboardPower
windows 7 Professional 64 - bit Hanns g 20" 16:9 monitor logitech illuminated keyboard corsair GS 700W 
CaseMouseMouse PadAudio
Silverstone FT02B G500 17" by 13" mouse pad Logitech S-220 17 Watts 2.1 Multimedia Speaker ... 
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Superlux HD668B Dynamic Semi-Open Headphones Olympus ME-52W Noise Canceling Microphone  
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CPUMotherboardGraphicsGraphics
i5 2500k @ 4.5 GHz 24/7 Asrock P67 extreme4 gen3 XFX radeon 6870 1gb HIS radeon 6870 1 GB 
RAMHard DriveOptical DriveCooling
4 GB G.Skill 3x seagate barracuda 500GB(2 in raid 0, 1 alone) some asus DVD/ CD + R drive Hyper 212+ in push/pull 
OSMonitorKeyboardPower
windows 7 Professional 64 - bit Hanns g 20" 16:9 monitor logitech illuminated keyboard corsair GS 700W 
CaseMouseMouse PadAudio
Silverstone FT02B G500 17" by 13" mouse pad Logitech S-220 17 Watts 2.1 Multimedia Speaker ... 
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Superlux HD668B Dynamic Semi-Open Headphones Olympus ME-52W Noise Canceling Microphone  
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post #4 of 5
No, you have to remove the second card to test the primary card and replace the primary to test the second card.

PS. Only in Fullsreen Mode will engage Crossfire. Windowed Mode only primary card is working.
ケンジ
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ケンジ
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2x 6990 + 580 16GB 2133 MHz 24GB 2000 MHz 120GB x 2 RAID0 
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120GB x 4 RAID0 Raptor 300GB x 2 RAID0 CPU-370 CPU-370 
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post #5 of 5
Quote:
Originally Posted by j8ninja View Post
isnt that how you test them for their overclocks? i always assumed that you test each card seperately, and then test them together to see if they run stable with each other
Msi Afterburner. The slider accounts for both cards. Test the overclock with a video benchmark and if all ok then you are good to go.
    
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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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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