I did some testing on my Velka 5 v1.1 (this time with no side panels and tightening the mounting as much as I can for IS-47K)
9600k 1.2V 4.3GHz delidded Prime95 Smallest FFTs, HWINFO
blackridge and is-47k set as intake (blowing towards motherboard) all 3 using stock is47k fan
Blackridge: 93 c
IS-47K: 95 c
axp-90: 90 c
I tried again with thermalright's liquid metal (3 stained coolers later)
blackridge: 88 c
is-47k: 91 c
axp-90: 84 c
not the most scientific comparison, but I can vouch that liquid metal works really well with the axp-90 for some reason. regardless, i'm happy that my is-47k is performing with a tighter mount
What is the power draw of that chip at those settings?