Well, that's not total system power. That's the GPU core, Afterburner from MSI reporting. I have it tweaked down now to around 65-67 Watts, I'm power limiting to -19, temp limit at 50, and have the core clock at 1160 with the memory clocked up to 1856 (again not a modded bios yet as of this writing). Power at the wall is about 160w (old ASUS MB, Pentium dual core, 2 GB of RAM, Windows 10). If I up the memory any more I start throwing errors and get IP banned from my pool. Sorry to the pool 0perator when I do that!Wow. Are you sure you're using only 70 watts for 570s/h? That's really nice. Best I had seen was 90 watts for 690H/s with flashed BIOS.
That could be the more efficient card I'm looking for...
Damn, is this the power used by your 750 only? Did read in several places that it could use way less (Power Usage of GeForce GTX 750 Ti With Various Crypto Algorithms - Crypto Mining Blog for example).
I'll probably get one of each and do some testing to see how it goes.
For the price I can find those second hand though, the 750ti would have a better initial price / hs by a slight margin though.