AMD Vega Frontier Ethereum Hashrate disappointing 27Mh/s to 32Mh/s

The AMD Radeon RX Vega 64 and Radeon RX Vega 56 Graphics cards are out now and hopefully you’ve taken a look at gaming performance in our full review of both those cards. There have been rumors that the AMD Radeon RX Vega 64 is capable of getting hash rates as high as 100 MH/s mining Ethereum, so we also spent come time with Vega 64 and Vega 56 down in the Ether mine to see how they’d perform.
Useing Claymore’s Dual Ethereum AMD+NVIDIA GPU Miner v9.8 and tested the two VEGA cards one at a time in the system to see how they did on the current DAG epoch.



So, on the current DAG Epoch (#138), difficulty of around 1,700 TH and a block time of ~21.5 seconds this is what we are looking at in stock form with 1 minute average after running for a period of 15 minutes to let the cards warm up. The AMD Radeon VEGA 64 gets 34.4 MH/s with the system pulling 367 Watts at the wall. The AMD Radeon RX Vega 56 gets 32.4 MH/s with 306 Watts at the wall. Not bad results, but not close to the rumored 70-100 MH/s performance these cards were said to have.

VEGA Overclocked
We have been playing around with overclocking a bit more on the VEGA RX 56 and the performance numbers are a little weird. We are able to overclock the memory from 800MHz up to 950MHz with full stability. Running the memory at 1000MHz causes an instant crash and 975MHz causes random crashes at load, so we stuck with 950MHz. The Vega 56 gets 38 MH/s when we start mining, but down to an average 1 minute speed of 34.17 MH/s after just six minutes of mining. This is a nice bump up from the stock number of 32.43, but we wish it would stay up at 38 MH/s. We were doing this run with the power limit at -23% and when we raised that up to -10% the 1 minute average increased up to 34.1 MH/s. The power jumped from ~252 Watts to over 320 Watts by doing that. We are still investigating and let AMD know of the issue as no matter the power limit performance starts out at 38 MH/s and drops down 3-4 MH/s after a few minutes. We also have been having issues with Wattman going transparent during use, so another growing pain that needs to be worked out on Vega!

Conclusion
Is price vs hashrate profitable? i believe that the RX 480, 580 are more profitable and easy i will keep mining with my rx480.