Quote from: kostepanych on February 21, 2014, 09:25:12 AM

Quote from: xorpheus on February 21, 2014, 07:51:46 AM

Quote from: eduffield on February 21, 2014, 02:20:24 AM

I was thinking about this earlier, does anyone know how hot GPUs run mining bitcoin? If that runs cooler I would tend to think the extra power draw and heat is because scrypt pretty much rewrites the entire ram available as fast as possible over and over again, whereas Bitcoin/Darkcoin would only use a small amount of ram.

Curiosity got the better of me... below are some test results for 2 x HD7950. Power is measured at the wall. Idle power is 210W.

darkcoin
hashrate: 3.80Mh/s
temps: 52,57
power: 415W

bitcoin
hashrate: 1.21 Gh/s
temps: 69,76
power: 680W

litecoin
hashrate: 1.34Mh/s
temps: 73,81
power: 740W

This may not be a valid comparison because I don't know how to optimize settings for bitcoin. All I did was fiddle with the intensity setting. Does 605Mh/s for each HD7950 sound reasonable?

What config do you use for darkcoin?

For HD7950:
"kernel" : "darkcoin",
"gpu-engine" : "1150",
"gpu-memclock" : "1250",
"gpu-threads" : "2",
"intensity" : "16"

wow there is a lot of activity in this thread... I go to sleep and when I wake up there's another 8 pages!