No one has mentioned the 270's yet. Here's my experience:
Asus R9 270 : Unlocked. 1.100/1030/1400 = 440 kh 7 days stable. 120 W draw per card
Gigabyte R9 270: VOLTAGE LOCKED!
Tried 1.100v and 1.150v in VBE7, flashed BIOS, no errors, but the cards hang on boot when X starts. Running stock, these cards draw 30w more per card than the Asus 270's, for a just a slight 10 kh improvement.
On top of that the Asus cards are quieter and cooler.
Asus R9 270 : Unlocked. 1.100/1030/1400 = 440 kh 7 days stable. 120 W draw per card
Gigabyte R9 270: VOLTAGE LOCKED!
Tried 1.100v and 1.150v in VBE7, flashed BIOS, no errors, but the cards hang on boot when X starts. Running stock, these cards draw 30w more per card than the Asus 270's, for a just a slight 10 kh improvement.On top of that the Asus cards are quieter and cooler.
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Same question here for R9 290.
Plus I'm in linux and CGminer doesn't show voltage on my card. But if I try to change the voltage, it says that driver accepted but doesn't show any change on cgminer outputs.
Plus I'm in linux and CGminer doesn't show voltage on my card. But if I try to change the voltage, it says that driver accepted but doesn't show any change on cgminer outputs.
i have some asus R9 270(non x)s with the cuII cooler or whatever... same.. when i enter in values running, or spec them in cgminer config, it still displays in as original volts, but doesnt report any failure, also heat and hash are unaffected.
its there some trick to dropping the voltage with these? linux.