Great info here. I've had my R815s turned totally off for a bit... all Quad 6380 machines.
Looks like may have to turn them on again when Monero forks. Doesn't seem profitable for LOKI.
I am gearing up with twelve Dell R815 Servers. They are a mix of quad 6348 and 6378 Opteron's.
Two Dell R815's with 4x 6348's and two R815 with 4x 6378's produce:
43,892 H/s on RandomX while drawing 13.65 Amps @ 240 VAC or 3276 watts at the service panel.
That is an average of 819 watts per server.
I measured after mining constantly for 30 minutes so the Hash Rate and Power Usage numbers have stabilized along with the server fan speeds.
The quad 6348's produce: 10684 H/s while the quad 6378's produce: 11262 H/s.
The 43,892 H/s @ 3276 watts is 13.4 H/s/Watt.
Looking forward to the November 30th fork.