Yeah, well, this is still a reference PCB, far from the options of your KPE cards, but these, for stock, are still pretty hefty.
Either way for that VERY minimal voltage, you are getting some good performance.
Once you get blocks these are going on your chiller right? You will likely get these colder than your KPE's as these will just not output the heat which should be able to get you a little more clocking overhead.