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7950 overclocking

post #1 of 5
Thread Starter 
Hi, I am attempting to overclock my gigabyte 7950's in crossfire (which I hear overclock like a beast). Every time I move the slider for the frequency up even a little bit I have stability problems and no game will play. I tried raising the voltage a little as well with no luck. so I have two questions:

1. Is it possible to overclock in crossfire mode and if so what am I doing wrong?

2. What is a surefire test to make sure a graphics card isn't faulty?

Thanks.

* I forgot to add that my PSU is a Corsair HX 1050 watt, CPU is a i5 2500k oc'd to 4.5 ghz, and mobo is an asrock prof fatality gen 3.
Edited by 65caliente - 3/9/12 at 10:25am
 
School
(9 items)
 
 
CPUMotherboardGraphicsRAM
i5 2500k @ 4.5 ghz Asrock z68 Fata1ty gen 3 2x Gigabyte 7950 Windforce 16 gb Corsair dominator 
Hard DriveHard DriveHard DriveOptical Drive
2x 120gb Corsair force 3 in raid 0 Seagate 1.5 tb data 60 gb corsair force 3  LG blu ray burner with M-disk 
CoolingOSMonitorMonitor
Noctua NH-D14 cpu cooler WIndows 7 64 bit professional Samsung 65" 8000 series LED.   Westinghouse 40" 1080p LCD 
KeyboardPowerCaseMouse
Logitech Wireless Corsair HX 1050 Corsair Carbide 400r Logitech Wireless 
CPUGraphicsRAMHard Drive
i5 470um amd hd 5450 mobility 8 gb 800 mhz Western digital 500gb 
OSMonitorKeyboardCase
WIndows 7 64 bit professional 1280 x 800 WXGA Wacom capacitive multi touch. Chiclet style magnesium keys. Fully aluminum and magnesium body. 
Audio
Altec Lansing built in  
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School
(9 items)
 
 
CPUMotherboardGraphicsRAM
i5 2500k @ 4.5 ghz Asrock z68 Fata1ty gen 3 2x Gigabyte 7950 Windforce 16 gb Corsair dominator 
Hard DriveHard DriveHard DriveOptical Drive
2x 120gb Corsair force 3 in raid 0 Seagate 1.5 tb data 60 gb corsair force 3  LG blu ray burner with M-disk 
CoolingOSMonitorMonitor
Noctua NH-D14 cpu cooler WIndows 7 64 bit professional Samsung 65" 8000 series LED.   Westinghouse 40" 1080p LCD 
KeyboardPowerCaseMouse
Logitech Wireless Corsair HX 1050 Corsair Carbide 400r Logitech Wireless 
CPUGraphicsRAMHard Drive
i5 470um amd hd 5450 mobility 8 gb 800 mhz Western digital 500gb 
OSMonitorKeyboardCase
WIndows 7 64 bit professional 1280 x 800 WXGA Wacom capacitive multi touch. Chiclet style magnesium keys. Fully aluminum and magnesium body. 
Audio
Altec Lansing built in  
  hide details  
Reply
post #2 of 5
Quote:
Originally Posted by 65caliente View Post

Hi, I am attempting to overclock my gigabyte 7950's in crossfire (which I hear overclock like a beast). Every time I move the slider for the frequency up even a little bit I have stability problems and no game will play. I tried raising the voltage a little as well with no luck. so I have two questions:
1. Is it possible to overclock in crossfire mode and if so what am I doing wrong?
2. What is a surefire test to make sure a graphics card isn't faulty?
Thanks.
* I forgot to add that my PSU is a Corsair HX 1050 watt, CPU is a i5 2500k oc'd to 4.5 ghz, and mobo is an asrock prof fatality gen 3.

I had a 6970 that I could not push past stock at all! This does happen, unfortunately. What you should do is download a program called Furmark. It is a stress test for GPU's and will let you know how stable your card is at its' current settings and overclocked settings. It is possible to overclock in crossfire mode, just make sure to set each card at a stable level. (IE running furmakr without crashing) What kind of FPS do you get at stock?

Edit: Here is the link: http://www.ozone3d.net/benchmarks/fur/
post #3 of 5
Thread Starter 
Okay thanks, I was getting unusually low frame rates for a 7950 crossfire setup for example I couldn't max out just cause 2 with v sync off without there being slow motion lag. The dark tower benchmark in that game only averaged 40 fps. If I remember right my 3d mark score was like 11k in 720p though which was normal for the system according to the software.
 
School
(9 items)
 
 
CPUMotherboardGraphicsRAM
i5 2500k @ 4.5 ghz Asrock z68 Fata1ty gen 3 2x Gigabyte 7950 Windforce 16 gb Corsair dominator 
Hard DriveHard DriveHard DriveOptical Drive
2x 120gb Corsair force 3 in raid 0 Seagate 1.5 tb data 60 gb corsair force 3  LG blu ray burner with M-disk 
CoolingOSMonitorMonitor
Noctua NH-D14 cpu cooler WIndows 7 64 bit professional Samsung 65" 8000 series LED.   Westinghouse 40" 1080p LCD 
KeyboardPowerCaseMouse
Logitech Wireless Corsair HX 1050 Corsair Carbide 400r Logitech Wireless 
CPUGraphicsRAMHard Drive
i5 470um amd hd 5450 mobility 8 gb 800 mhz Western digital 500gb 
OSMonitorKeyboardCase
WIndows 7 64 bit professional 1280 x 800 WXGA Wacom capacitive multi touch. Chiclet style magnesium keys. Fully aluminum and magnesium body. 
Audio
Altec Lansing built in  
  hide details  
Reply
 
School
(9 items)
 
 
CPUMotherboardGraphicsRAM
i5 2500k @ 4.5 ghz Asrock z68 Fata1ty gen 3 2x Gigabyte 7950 Windforce 16 gb Corsair dominator 
Hard DriveHard DriveHard DriveOptical Drive
2x 120gb Corsair force 3 in raid 0 Seagate 1.5 tb data 60 gb corsair force 3  LG blu ray burner with M-disk 
CoolingOSMonitorMonitor
Noctua NH-D14 cpu cooler WIndows 7 64 bit professional Samsung 65" 8000 series LED.   Westinghouse 40" 1080p LCD 
KeyboardPowerCaseMouse
Logitech Wireless Corsair HX 1050 Corsair Carbide 400r Logitech Wireless 
CPUGraphicsRAMHard Drive
i5 470um amd hd 5450 mobility 8 gb 800 mhz Western digital 500gb 
OSMonitorKeyboardCase
WIndows 7 64 bit professional 1280 x 800 WXGA Wacom capacitive multi touch. Chiclet style magnesium keys. Fully aluminum and magnesium body. 
Audio
Altec Lansing built in  
  hide details  
Reply
post #4 of 5
What resolution are you gaming at? Do you have the latest application profiles from amd? Are your drivers up to date?
post #5 of 5
Thread Starter 
I know I have the latest drivers but I wasn't aware of application profiles being separate from the drivers themselves? I'm guessing I just get those from amd's website as well? I play at 1080p so nothing too crazy.
 
School
(9 items)
 
 
CPUMotherboardGraphicsRAM
i5 2500k @ 4.5 ghz Asrock z68 Fata1ty gen 3 2x Gigabyte 7950 Windforce 16 gb Corsair dominator 
Hard DriveHard DriveHard DriveOptical Drive
2x 120gb Corsair force 3 in raid 0 Seagate 1.5 tb data 60 gb corsair force 3  LG blu ray burner with M-disk 
CoolingOSMonitorMonitor
Noctua NH-D14 cpu cooler WIndows 7 64 bit professional Samsung 65" 8000 series LED.   Westinghouse 40" 1080p LCD 
KeyboardPowerCaseMouse
Logitech Wireless Corsair HX 1050 Corsair Carbide 400r Logitech Wireless 
CPUGraphicsRAMHard Drive
i5 470um amd hd 5450 mobility 8 gb 800 mhz Western digital 500gb 
OSMonitorKeyboardCase
WIndows 7 64 bit professional 1280 x 800 WXGA Wacom capacitive multi touch. Chiclet style magnesium keys. Fully aluminum and magnesium body. 
Audio
Altec Lansing built in  
  hide details  
Reply
 
School
(9 items)
 
 
CPUMotherboardGraphicsRAM
i5 2500k @ 4.5 ghz Asrock z68 Fata1ty gen 3 2x Gigabyte 7950 Windforce 16 gb Corsair dominator 
Hard DriveHard DriveHard DriveOptical Drive
2x 120gb Corsair force 3 in raid 0 Seagate 1.5 tb data 60 gb corsair force 3  LG blu ray burner with M-disk 
CoolingOSMonitorMonitor
Noctua NH-D14 cpu cooler WIndows 7 64 bit professional Samsung 65" 8000 series LED.   Westinghouse 40" 1080p LCD 
KeyboardPowerCaseMouse
Logitech Wireless Corsair HX 1050 Corsair Carbide 400r Logitech Wireless 
CPUGraphicsRAMHard Drive
i5 470um amd hd 5450 mobility 8 gb 800 mhz Western digital 500gb 
OSMonitorKeyboardCase
WIndows 7 64 bit professional 1280 x 800 WXGA Wacom capacitive multi touch. Chiclet style magnesium keys. Fully aluminum and magnesium body. 
Audio
Altec Lansing built in  
  hide details  
Reply
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