I might be mistaken here but the pumps on a CPU AIO is the same as the ones used on GPU hybrids.
That being said, I do believe that the manufacturer of the EVGA Hybrid pump ( again an Asetek 5 I believe) has released a newer version the 6 since the release of the 1080 Hybrid, but maybe it does have the 6 version.
There are also other manufacturers as well. 2 or 3 I believe.
You would be better off contacting EVGA to ask them exactly which one they use.