Impressive efficiency for an AMD setup!, very good!
the expensive PSU helps but the real deal is the NITRO+ with the modded bios and very precise tweaking.
good job!
I can get significantly more efficiency than that but with NVIDIA gpus (that costs 50% more money) so yeah... your setup rocks
because at the price of your rig, it is almost impossible to have better efficiency than that.
A friend of mine says that i have Power Efficiency TOC hehe, yeah, i am freaking obsessed with mining efficiency, that's why i use NVIDIA cards instead of AMD, and i don give a damn if they cost 50% more because i pay so little on power (and power here is EXPENSIVE!) that i can sleep like a baby, also my flat doesn't have like 40C all day because of the heat of the rigs (i remember when i had like 20 R9 280X here, Oh my, it wasn't the power consumption the problem, it was he HEAT, it was hell!!, even in winter, i had all the windows open, like -2C outside and 32 C inside, insane.
cheers
indtk.