Card : Reference XFX 290, Elpida memory
Core: stock 947
Memory: stock 1250
Core voltage: -62
Power tune: -6 - 0
Fan speed: 70%
Intensity: 19-20
-w (?): 256-512
Thread-concurrency: 28657
Work Unit: 800 atm (much variance, depends on (pool) luck I believe)
Hash rate: 820-840 kHash/s
I prefer -i 19, 820khs due to lower reject rate.
Good point on the Rejects. I'm getting a few (2-3%?) at my highest settings. I have to keep an eye on that. No hardware errors anyway.
Yeah I think you're right, I've started rebooting after driver crashes and it helps. I'm hashing now around 840kh @ 900/1400. I think 1500 memory was too high and was making mining crash instantly. Is there a way to increase mem voltage... My option is greyed out in AB, perhaps it's locked on my card?
Another thing I noticed, inserting the second 7970 under the 290x makes the load temp on the 290x jump 15-20C to the 90s, even if the 7970 is just sitting there idle.
Can you fill out that template with your settings? We can compare if there are other optimizations possible.
There are huge memory holes. My 290x has them around 1500. Go 1 MHz over and it drops the hashrate dramatically. As you go lower near 1250 you should be at 1250. At 1625 (AB Max) it was on the rise again but I believe it had to go to or near to 1750 to hit the optimum values again.
I wonder why the 7970 idle alongside it has such a big effect. How far apart are they? Is the 7970 blocking the airflow? I'm curious about this one if it's similar with my crossfire. I'm getting risers this week so I'll probably put a 4 card configuration with two outside and I'm thinking I'll put one custom card with one reference inside the box, and 1 of each outside of it hanging somehow.
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Dogecoin is flirting with 90. I wonder if it'll make it higher than 100. On cryptsy there's a 100 BTC wall at 100.