My IS-47K arrived two days early and after 2.5 hours of forcing it onto my Gigabyte x570i motherboard in a K39v2 case, I finally ran P95 to test performance. Long story short, 8-10 hotter than an L9A with 10mm fan shroud (note a slight ambient temp increase). Noise is also louder than the L9A.
Test system:
Gigabyte Aorus X570i itx
AMD Ryzen 7 3700x with -0.5mv offset
FlareX RAM
Gigabyte 2060 itx
Enhance 7660b 600W
K39 version 2.0 case
Coolers tested:
Noctua L9A chromax w/10mm fan shroud from JHack
IDCooling IS-47K w/Noctua chromax 92mm fan
Results:
LOAD
L9A w/shroud maxed out 10mins Prime95 at 84.8C
IS-47K w/Noctua chromax maxed out only 6 minutes into Prime95 at 94C; test stopped.
(note, 2-3C ambient temperature change)
IDLE
L9A 46-50C
IS-47K 52-55C
Very disappointing performance and unfortunately a huge pain in the @$$ to swap it out in this case. Surprising results given the increase in mass on the IS-47K and 4 additional heatpipes. I did take a lot of pictures along the way but once I finally force fit the fan onto the IS-47K by wedging it into the heatpipes, I forgot to take a picture of the final fit so I will post them after I swap back to the L9A for those who are still interested in trying this cooler out with a Gigabyte X570i mobo. In default configuration, the 92mm fan bumps up against the chipset heatsink and just barely prevents it from mounting on the mobo. If you remove the chipset fan, it should fit without an issue. That wasn't an option for me.
Let me know if you have any questions or want to see any other pictures. I'm off to make the swap back to the L9A and will have this cooler up for sale for anyone who wants to give it a go despite the results. Make an offer, I'm willing to let it go real cheap.
Pictures