This has got to be the first heat-sink I ever owned and was using.......before an SPCR review. And my impressions are similar, but not exactly the same. My Zipang replaced a Thermalright XP-120, on an Intel D865-GLC board, using a P4-3.4EE (hot). It idles at 110w and goes to about 200w draw running CPUBurn.
I did many bench tests and measurements before installing the setup in my big Lian Li case. The fin pack of the Zipang is about 25mm further from the board than the fins of the XP-120. What I immediately noticed......many of the MB components were running much hotter than when the XP-120 was in there......no matter what fan I tried. I replaced the Zipang fan during the tests with a variety of fans, some 140s, and some 120s, including a 1600rpm S-Flex. The stock Zipang fan returned the worst board temps, although the CPU temp was ok.
It didn't look like the stock Zipang setup was going to work for me when it was in the case......so I did a few mods, and ended up with some "skirts" for the Zipang, and switched over to a 1300rpm 140x20 Aerocool fan. This gave much better board/CPU temps at only a slightly higher noise level.
My impression was that the increased distance from the MB, combined with the lower pressure of the Zipang fan was to blame. The relatively low CFM, combined with the larger diameter of the fan, resulted in less airflow actually reaching the MB components. The new mod setup performs better....for me with my setup. YMMV.
Startup fan problems..... similar for me to the SPCR review. My controller gives the Zipang fan a 12v burst to get moving, then drops back to 5V till the sensor warms up. When the controller drops back to 5V, the Zipang fan stops completely, and doesn't start spinning till about 8-9V. At that time the CPU has reached a fairly high temp, as well as everything else on the MB. So you can see why I stopped using the Zipang fan.
IMHO.... a Yate Loon 140x25mm medium speed fan would be a better choice. I'm using the 140x20mm Aerocool mostly for clearance purposes. An Evercool Red Scorpion is another possibility....although noisier.
Remember I'm trying to cool a hot-running MB/CPU..... using a different setup (cooler) and the Zipang stock setup might be perfect. Using the stock Scythe mounting pieces, this cooler can mount in four different positions, so compatibility with many boards should be no problem.
I like the way mine performs in the case... after the modding.