I remember talking with Captherm about their MP-1120 and MP-1240 Multiphase CPU coolers shown at CES 2014 and 2015, but for some reason never reached consumer market. Think they were using OCP.
I've wondered when Oscillating heat pipes (OHP) would reach CPU coolers as they've been around almost 30 years now. Probably need mass production to make them economical enough to compete with conventional heatpipes. The were originally developed and patented by Hisateru Akachi back in 1990.
Phanteks Owners ClubWays to Better Cooling
i7 980 @ 3.55GHz =PH-TC14PE w/2x TY-143 fans =Crucial Ballistix 3x4GB =GA-X58A-UD5 =ASUS GTX580 DirectCU II =Enermax Modu84+ =Define R2 w/3x TY-140 case intake fans; all PWM controlled by CPU fan socketPhanteks Enthoo Primo MoBoRampage III ExtremeCPUi7 980X @ 4.0GHz =R1 Ultimate w/2x TY-143 fans =Dominator GT 6x2GB =Rampage III Extreme =ASUS GTX580 DirectCU II =TX850 =Enthoo Primo w/ custom castor base
This paper also gives some good info on strengths and weaknesses of oscillating heatpipes. Perhaps my understanding is wrong, but it appears OHPs prefer to be used planarly with a single evaporator and condensor block to ensure proper oscillation. This sounds great for a heatspreader or heat pipe transporting heat in a planar direction like in a laptop or phone, but this will not work well in desktop machines that rely on U or L shaped heatpipes to transport heat vertically due to other tall things in the vicinity of the heatsource like the memory, VRMs and GPU.
I wonder if a U or L shaped design is possible but no one has bothered to try when a planar design is so much simpler to design and works good enough for their application. Something like this recently proposed radial pulsating heat pipe heatsink seems to be the closest design to something that would be used in a desktop system.