how long did it take? i am 3 or 4 days in and no coin .
This is at communism ltc profit vs btc profit. with 1 card running hard what does your rig pull in power to get that high hash/
@74F ambient
Core@84-85C:
GPU-z says 131-133A with spikes to 137A occasionally
GPU-z says 1.088v with spikes and dips between 1.086v and 1.090v
RAM:
GPU-z says 15.0A with spikes and dips between 14.9A and 15.1A
GPU-z says 1.688v constant
VRM:
VRM1: 93C
VRM2: 91C
133A * 1.088V = 144.704W
15.0A * 1.688V = 25.32W
144.704W + 25.32W = 170.024W at the card excluding Fan
Approximating fan at 10W + 170.024W = 180.024W @ the card
Gold power supply .90 efficiency means
1.1 * 180.024W = 198.0264W @ the wall for just the card
The Amperage the core takes is less when the core is cooler, even with identical load and hash-rates and everything else. This shows that you could probably make it much more energy efficient if you water cooled it or had a better cooler on it in general.
It would be interesting to directly test this against a similar ASIC quality MSI Twin Frozer 7970 with same clocks and similar voltage.
My hunch is that the MSI Twin Frozer would be able to sustain the same clocks at lower voltage because it would be able to maintain less vdroop as well as deliver cleaner power from the additional phases they employ.
The MSI Twin Frozer is rumored to have badly designed VRM heatsink though, so you may need to modify that yourself.
The reason 7950s are so much less power efficient than 7970s when comparing cards with the same boards is that they typically have horrendously low ASIC values.
7950s with ASIC values as low as 40% are not unheard of, and the average is around 50% at the moment.
My HIS 7950 IceQ (not IceQ^2) with bad HIS VRM setup has 168A showing in GPU-z for core and it looks like its power throttling it down to 64A sometimes momentarily, it doesn't effect the hash rates or the work unit rates though.
My Sapphire 7970 and my Sapphire 7950 use approximately the same amount of core amps in GPU-z with the 7950 sometimes using more, and this is with the 7950 running at 71C
When my 7970 is running at 71C it shows ~120A core.