I believe these 4 x K80 machines could still deliver more than 70 Mkeys/s each (machine).
What about 32 vCPU , 8 x K80 machines ?
I believe the 8 x K80 machines do have 64 vCPU? else even the new generator cannot saturate 8 K80 with "only" 32 vCPUs.
Still, the speedup and GPU usage is way better with the new GPU generators. Speedup between 2.5x and 3.1x is to be expected.
With the 4 x K80 32vCPU machines one can expect the CPUs to almost saturate the GPUs. (Now less than 50%)
All in all - with the new generators we should be able to significantly lower the time until #51. Even worst case it should be 10 days less than what the stats show now. (edit: I see we have almost 40% of the #51 search space covered)
Rico