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Anyone else GPU mining this?

Also if you are using a cpu make sure you have dual channel memory for a big boost in hash rate. I have not tried it with a quad channel setup but I have a hunch you would see some performance boosts.

CPU-only
Yes memory bandwidth is usually the first bottleneck, secondary L3 cache size and finally - CPU frequency

Here are some GPU benchmarks for anyone that is interested, I ran mine on linux with a power limit of 95 watts for a GTX 1070 so you can get more hash with full power.

FYI GPU mining has been around for at least 6 months from my research.

Benchmarks https://pool2mine.com/bench

I'm running a few Xeons (E5 v4) 2.0-2.4kH/s per 110-150W (full system power consumption) also hacked a few low powered Intel (Core M) devices at 400-450H/s at 9W power consumption.

Those numbers beat any GPU.

I have also seen benchmarks on Intel gen 8. and AMD Ryzen/TR that can do even better than that. None the less RTX data is yet to come.

Those intel core M numbers are impressive, a single GTX 1070 in a system running an amd 200ge (35 watt TDP) with the card set to a power limit of 100 will do about 3.1kH/s with a power draw of 140 watts at the wall and you can get even more density and power efficiency with a 6 card rig.

I have been able to get about 1.4kH/s on a ryzen 1500x and about the same speed on a threadripper 1950x which makes me think the threadripper needs 2 instances to run properly

New AMD's can do magic just need to assign the mining threads correctly since one thread cant access all of the L3 cache memory space as Intel CPUs.

In cpuminer-opt play with -t and --cpu-affinity setting to get the best results.

That did the trick on the threadripper but its a power hungry beast so the Ryzen 1500x seems to be the best, thanks for your help.