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Crossfire/Overclocking

post #1 of 3
Thread Starter 
hello all! I am having a bit of an issue with my crossfire/overclock setup. I have 2 hd6950's (Asus Directcu II) I have read that overclocking on them is phenominal. However, I set my overdrive from 810mhz on the gpu to about 910mhz and the memory from 1250 to 1350. Temps seem pretty reasonable and furmark stays pretty stable but when in games after a while I get hard-locks. I bumped up the voltage to 15% but it still happens. I did notice however that it does not seem like the fans on my second card are speeding up when I change the slider in CCC. Any suggestions or insight into what is going wrong? Thanx for the help.
post #2 of 3
Drop that memory OC down dude. I don;t know much about the 6xxx series, but on the 58xx series you really only could get about 50Mhz from the ram. And really, it doesnt help much except for a few points in 3Dmark. Put your ram at stock and try again
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Sweaty Box
(10 items)
 
Stacker T01 v5.0
(10 items)
 
Sturbin' Box
(13 items)
 
CPUMotherboardGraphicsRAM
i7 5960X ASUS Rampage V Extreme 2x Nvidia 1080ti SLI 32GB Corsair Dominator DDR4 3400Mhz 
Hard DriveCoolingOSMonitor
Samsung 850 pro NVMe M.2 Custom EK watercooled loop Windows 10 Pro Triple LG 4K 27" 
PowerCase
Cosair 1500Ti CaseLabs M10 
CPUMotherboardGraphicsRAM
Delidded i7 3770K @ 5Ghz ASUS Maximus V Gene EVGA GTX 670 SLI - Heatkiller Blocks 16GB Corsair Vengeance DDR3 @ 2400Mhz 
Hard DriveCoolingOSMonitor
Samsung 840 EVO Custom Loop - EK Supreme HF Windows 7 Pro 64-bit Dell 30" + 2 x Dell 24" 
PowerCase
Sparkle Gold 1200W CM Stacker T01 
CPUMotherboardGraphicsRAM
Phenom II X6 1055T @4.0GHz (308x13) / 3.08GHz NB ASUS Crosshair IV Formula w/EK full coverage block ATI 5870x2 Crossfired @ 950/1250 8GB Corsair Vengeance DDR3 1600 
Hard DriveCoolingOSMonitor
OCZ Vertex 3 SSD Swifttech Apogee Drive Block/Pump Windows 7 64bit Pro ASUS 27" LCD 
PowerCase
Corsair Professional Series Gold 650W  Lian-Li PC-650A 
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post #3 of 3
Thread Starter 
Will do, I'll let you know if it turns out!

Any Idea about how to get bot of my cards' fans to change when I tell them to? Im running CCC11.4
Edited by Jason33w - 3/18/11 at 12:09pm
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