Overclock.net › Forums › Graphics Cards › AMD/ATI › Why is Idle Voltage Lower now, after OC?
New Posts  All Forums:Forum Nav:

Why is Idle Voltage Lower now, after OC?

post #1 of 4
Thread Starter 
First off, I am a noob. Just finished my first build Saturday. After I got everything up and running I downloaded GPU-Z and Trixx 4.6 . I distinctly remember my voltage hovering around .923 at idle. Then I did some overclocking and ran some benchmarks. I noticed that my voltage was "Force Constant" without me ever checking it in the settings. I tried to figure out why and ended up switching to the 2nd BIOS. That's when I noticed the idle voltage bouncing around .80 -.82 . I thought maybe something was different in the 2nd BIOS so I switched it back. Currently, I am using Trixx 4.3 to OC, the idle voltage is still .80 -.82 . I also noticed that the voltage only goes up to about 1.256 when running Unigine even though I have VDDC set at 1299. Is this normal? Please excuse my ignorance.
Sapphire HD 7950 -3L
Edited by MisfitFly - 3/11/13 at 8:05pm
    
CPUMotherboardGraphicsRAM
Intel 3570k oc 4.4ghz Biostar TZ77XE3 SAPPHIRE 100352-3L Radeon HD 7950 3GB Corsair Vengeance 8gb 1600 
Hard DriveHard DriveOptical DriveCooling
Western Digital WD Blue WD10EZEX 1TB ADATA XPG SX900 128gb SSD ASUS 24X DVD Burner Enermax ETS-T40-TB 
OSMonitorKeyboardPower
Windows 7 64-bit Dell S2340L 23" IPS Gigabyte k6800 Rosewill Hive 750watt modular 
CaseMouseMouse PadAudio
Rosewill Blackhawk Mid-tower Logitech G400 ROCCAT ROC-13-101 Altec Lansing VS2621 
Other
Rosewill RNX-N250PC2 Wirless Adapter 
  hide details  
Reply
    
CPUMotherboardGraphicsRAM
Intel 3570k oc 4.4ghz Biostar TZ77XE3 SAPPHIRE 100352-3L Radeon HD 7950 3GB Corsair Vengeance 8gb 1600 
Hard DriveHard DriveOptical DriveCooling
Western Digital WD Blue WD10EZEX 1TB ADATA XPG SX900 128gb SSD ASUS 24X DVD Burner Enermax ETS-T40-TB 
OSMonitorKeyboardPower
Windows 7 64-bit Dell S2340L 23" IPS Gigabyte k6800 Rosewill Hive 750watt modular 
CaseMouseMouse PadAudio
Rosewill Blackhawk Mid-tower Logitech G400 ROCCAT ROC-13-101 Altec Lansing VS2621 
Other
Rosewill RNX-N250PC2 Wirless Adapter 
  hide details  
Reply
post #2 of 4
I would suggest MSI Afterburner instead of Trixx software. It is more widely used by the community and more stable overall.

When it downclocks, is it using a lower core clock? Also, the reason it uses less voltage than you desired is that it is automatically adjusting the voltage within range of your desired or specified.
post #3 of 4
Thread Starter 
I tried Afterburner first but it did not allow voltage adjustment. I don't currently have "Forced Constant Voltage" so yes the voltage fluctuates with core clock. However, the idle voltage is still lower now then when i started. I'm not sure what the core clock was originally at idle. Now it is 300/150
    
CPUMotherboardGraphicsRAM
Intel 3570k oc 4.4ghz Biostar TZ77XE3 SAPPHIRE 100352-3L Radeon HD 7950 3GB Corsair Vengeance 8gb 1600 
Hard DriveHard DriveOptical DriveCooling
Western Digital WD Blue WD10EZEX 1TB ADATA XPG SX900 128gb SSD ASUS 24X DVD Burner Enermax ETS-T40-TB 
OSMonitorKeyboardPower
Windows 7 64-bit Dell S2340L 23" IPS Gigabyte k6800 Rosewill Hive 750watt modular 
CaseMouseMouse PadAudio
Rosewill Blackhawk Mid-tower Logitech G400 ROCCAT ROC-13-101 Altec Lansing VS2621 
Other
Rosewill RNX-N250PC2 Wirless Adapter 
  hide details  
Reply
    
CPUMotherboardGraphicsRAM
Intel 3570k oc 4.4ghz Biostar TZ77XE3 SAPPHIRE 100352-3L Radeon HD 7950 3GB Corsair Vengeance 8gb 1600 
Hard DriveHard DriveOptical DriveCooling
Western Digital WD Blue WD10EZEX 1TB ADATA XPG SX900 128gb SSD ASUS 24X DVD Burner Enermax ETS-T40-TB 
OSMonitorKeyboardPower
Windows 7 64-bit Dell S2340L 23" IPS Gigabyte k6800 Rosewill Hive 750watt modular 
CaseMouseMouse PadAudio
Rosewill Blackhawk Mid-tower Logitech G400 ROCCAT ROC-13-101 Altec Lansing VS2621 
Other
Rosewill RNX-N250PC2 Wirless Adapter 
  hide details  
Reply
post #4 of 4
Quote:
Originally Posted by MisfitFly View Post

I tried Afterburner first but it did not allow voltage adjustment. I don't currently have "Forced Constant Voltage" so yes the voltage fluctuates with core clock. However, the idle voltage is still lower now then when i started. I'm not sure what the core clock was originally at idle. Now it is 300/150

The voltage is locked only because there is a restriction on it. I'll message you the procedure to unlock voltages (a link most likely).

Having a low idle voltage isn't necessarily a bad thing either. If the card is stable, and running at a decent voltage/clock, you should be fine.

Edit: Nevermind. Here you go.
New Posts  All Forums:Forum Nav:
  Return Home
  Back to Forum: AMD/ATI
Overclock.net › Forums › Graphics Cards › AMD/ATI › Why is Idle Voltage Lower now, after OC?