What are the implications in the comparison of efficiency/functionality of the following Rigs:
A) 2 xfx R9 295X2 = ~$900 = ~1000W = 1120 SOLs ZEC, 120MHs ETH
B) 6 RX 470s = ~$1100 = ~880W = 1120 SOLs ZEC, 164MHs ETH
C) 5 R9 390 = ~$1200 = ~800W = 1250 SOLs ZEC, ____MHs ETH
I think all of details / presumptions are correct. This would lead me to believe, as it stands, that C would be the most efficient option...correct?
You might want to check power usage numbers again when mining ETH as its considerably higher than when mining ZEC.
Eth mining or dual mining? Eth only uses similar power at stock clocks, and you can downclock a lot, allowing significantly lower voltages, further reducing power.