The specs on the P366 specify a Sunon 60mm x 25mm fan, but we were pleasantly surprised to find a YS Tech instead.

The fan is very quiet but powerful enough to send lots of cool air down through the copper fins which are spaced 2mm apart.

When we say the Neng Tyi P366 is a sold copper heat sink we mean just that. Apart from the clip, and fan everything on this little guy is copper.

While the fins are bonded to the 3mm thick copper base, we're not sure if they are soldered or glued in some fashion. The joint appears to be good enough for thermal conduction as would be expected.

Without the fan attached its a bit easier to see how Neng Tyi assembles their copper fins into one large assembly. Small tabs are folded over to create on interlocking unit out of many individual copper fins.

Also note the nice big thumb lever for the clip - it does a good job making clipping a lot easier.

At first glance we were a bit weary of the base of this copper cooler. But despite our first impressions the area which makes contact wit the processor was perfectly flat.

For our tests we removed the Bergquist pad, which resulted in about a 1 degree drop in temperature.