Dynatron DC1U-B02

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Copper heatsink for 1U cooling – Joe

SUMMARY: An interesting design for 1U cooling.

P4 1U

Size: 88.5 x 62 x 29.5 mm high; Weight 345 grams.

The good guys at Dynatron were nice enough to send a sample of their 1U heatsink, model # DC1U-B02 to test out. In contrast to most heatsinks, this one features a blower rather than an axial fan. The heatsink is a copper skive design, which means that the fins are literally peeled out of the copper base – there are no solder joints with this technique.

The blower is a YS Tech Model #BD125015BB-2F – an 50 x 15mm squirrel cage fan rated at 6.1 cfm @ 7800 rpm, 50 dBA¹ (my noise estimate). I found it to be noisy – I measured its noise at 70 dBA with a Radio Shack sound meter 8″ above the fan, about the same as a Delta 38 (about 69 dBA). It’s safe to use a motherboard fan header (3.6 watts).

The base is a copper baseplate:


I found that when running a fingernail over it, you could feel and hear the polishing marks on its copper base.

The mounting bracket is a good one:


Mounting requires removal of the motherboard; the back plate is held in place with four screws. Once in place, the system is very secure and clipping the heatsink in place is very easy.


I tested the Dynatron DC1U-B02 on an Acorp 4S845A motherboard with a modified P4 1500 to read CPU case temps.

TEST RESULTS – Motherboard

CPU Case Temp

Ambient Temp



MBM Temp

Acorp 4S845A

41.4 C

21.2 C



35 C¹

Delta = CPU temp – Ambient Temp
C/W = Delta / CPU Watts