Quote from: verloren on November 05, 2013, 03:53:44 AM

Quote from: Prelude on November 04, 2013, 04:13:21 PM

Quote from: verloren on November 04, 2013, 04:06:40 PM

Quote from: Prelude on November 04, 2013, 03:15:25 PM

Quote from: JessicaSe on November 04, 2013, 02:11:36 PM

Quote from: Prelude on November 04, 2013, 07:58:18 AM

I'm not sure if this is a bug in the software, or whether there is some funky things going on with the card's themselves, but voltages seem to set themselves where they please. My 2 cards have fairly comparable ASICS qualities, one is 78% while the other is 74%. Setting voltage to 1.25v on them = 1.031v for 78% ASIC and 1.063v for the 74% ASIC card. Here's another weird thing I noticed, the card running 1.063v actually pulls 5w less at the wall while hashing at the same settings. Seems like the higher ASIC card actually has more leakage. Increasing clock speed will also increase the GPU's voltage by it's self. Let's say for example: 1.25v set 1000mhz clock = 1.063v after vdroop using gpu-z. Up the clock speed to 1100mhz and now gpu-z measures 1.120v or so. To get back to 1.063v,youll have to lower voltage in GPUTweak to 1.15 for example. Those aren't actual numbers, but you get the gist of it. What's worse is that both cards behave differently!

This is really weird, higher ASIC usually have better quality output and you can lower the voltage lower compare to others and thus saving more energy. At least thats how it works for my 4 GPU...

Yep, higher ASIC should mean less leakage. Who knows.

Hoping to get somewhere with 2 threads today.

Are they both running at the same temps even with the voltage difference?

Well CGminer is set to keep them at max 80c, so they're both at 78c right now but the 1.063v card is running it's fan 200RPM higher to keep it there so it is giving off a little more heat.

Summary
78% ASIC 1.031V
74% ASIC 1.063V - hotter, draws less power

That is really weird. Most reviews I've looked through indicate that increased heat = increased power draw.

This is weird, unless the GPU is behind the first GPU.....