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Mining eth at about 20-21 Mh/s. -50% power limit, runs at 63-65c and the card draws about 75w according to HWMonitor. This is my personal PC, so at best I'm probably break even when you factor in the wattage of the rest of the pc.
What OS is this under? Is it with Claymore? If so try a different OS or a different miner and see if you can get a faster speed. You might be able to get 30MH/s. Back in 2016 or so this was the speed that these GPUs got.
They were the most power efficient GPUs at the time, however due to their cost, many just mined with R9 290 and later switched to RX series GPUs.
Reason why is because I think this GPU like the Hawaii suffer from the DAG slowdown and my R9 290 also hashed at like 20MH/s when a few years back hashed at 30MH/s. Apparently there is some bug with Windows or Claymore, so switch a few things around and see if you can get 30MH/s. Power consumption will be a little more.
Yeah this is Claymore on Windows 10. If I run without turning down the power limit I'm able to get 30 Mh/s but it uses approximately twice the power (according to HWMonitor.) So I figured 2/3 the output for half the wattage was more efficient. I tried phoenix and seemed to get exactly the same numbers.
