http://www.techpowerup.com/forums/threads/vbe7-vbios-editor-for-radeon-hd-7000-series-cards.189089/
http://rumorscity.com/2013/12/09/how-to-modify-video-bios-to-undervolt-gpu-in-linux/
Topic: [Linux] [BOUNTY] How to lower core voltage (undervolting) of a MSI R9 280x? - page 2. (Read 9012 times)
January 29, 2014, 07:11:26 PM
January 29, 2014, 07:01:34 PM
Hi everyone!
- Bounty for a solution: 0.03 BTC
Does someone know, how to lower the core voltage for a MSI R9 280x under Linux? I have 10 cards. 5 of them are s/n 602- V277 -28SB (great!) and 5 cards are s/n 602- V277 -38SB (bad!). Any other ideas how I can make this? Windows is not an option anymore.
Some facts:
- Factory voltage for MSI R9 280x (revision 28SB) = 1.2 V
- Factory voltage for MSI R9 280x (revision 38SB) = 1.25 V
I tried with latest VBE7 and set the voltage in the "State 1 - Performance" tab to 1062 for #6 and #0. After flashing the modded bios Vgpu is still at 1200 mV when measured directly on the card with a multi-meter. Power consumption at the wall is 270 Watts. However, GPUz shows 1062 mV. Afterwards I set the voltage to -100 in Afterburner. The card now reads 1097 mV (measured with the multi-meter again) and the power consumption dropped to 235 Watt.
My last try was to set #0 to default (1.2 V) and only mod #6 to 1062, but no chance. My multi-meter shows 1.2 V on the 28SB- and 1.25 V on the 38SB-cards.
I have no idea why the card ignores the VBE settings. Any advice would be appreciated.
- Bounty for a solution: 0.03 BTC
Does someone know, how to lower the core voltage for a MSI R9 280x under Linux? I have 10 cards. 5 of them are s/n 602- V277 -28SB (great!) and 5 cards are s/n 602- V277 -38SB (bad!). Any other ideas how I can make this? Windows is not an option anymore.
Some facts:
- Factory voltage for MSI R9 280x (revision 28SB) = 1.2 V
- Factory voltage for MSI R9 280x (revision 38SB) = 1.25 V
I tried with latest VBE7 and set the voltage in the "State 1 - Performance" tab to 1062 for #6 and #0. After flashing the modded bios Vgpu is still at 1200 mV when measured directly on the card with a multi-meter. Power consumption at the wall is 270 Watts. However, GPUz shows 1062 mV. Afterwards I set the voltage to -100 in Afterburner. The card now reads 1097 mV (measured with the multi-meter again) and the power consumption dropped to 235 Watt.
My last try was to set #0 to default (1.2 V) and only mod #6 to 1062, but no chance. My multi-meter shows 1.2 V on the 28SB- and 1.25 V on the 38SB-cards.
I have no idea why the card ignores the VBE settings. Any advice would be appreciated.
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