Scythe Kamaboko

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Heatsink test – Joe

SUMMARY: Good choice for CPU cooling.

Scythe

Size: 96 x 94 x 92mm; Weight: 700 grams.

The good guys at Scythe were nice enough to send a sample of the Kamaboko CPU Cooler for a test spin. It includes a rheostat controlled 92 mm fan which spins from 1000 to 3800 rpm. Mounting options include gear for Socket 478/775 P4 Prescott 3.6G+, Athlon64/64+, Socket754/940/939 and 3800+ (Not for 370/A).

Mounting is straight forward – there are four clips which engage the P4 retention bracket. I found the spring pressure to be fairly high – not unduly so, but not so easy to articulate with fingers only.

Parts that ship with the unit allow for multiple mounting options:

Parts

The base is well finished and polished:

Base

When I ran my nail over it, I could not feel or hear any ridges.

I noticed some gaps between the heatpipes and the copper base:

Pipes

Contact area is critical to performance, and gaps such as these diminish performance.

THE TEST

The Scythe Kamaboko was tested on an Acorp 4S845A motherboard with a modified P4 1500 to read CPU case temps.

TEST RESULTS – Acorp 4S845A Motherboard
Motherboard

CPU Case Temp

Ambient Temp

Delta

C/W

MBM Temp

3763 rpm, 65 dBA²

30.2 C

19.8 C

10.4

0.18

28 C¹

2503 rpm, 54 dBA²

32.1 C

20.3 C

11.8

0.20

30 C¹

1074 rpm, <50dBA dBA²

38.7 C

20.3 C

18.4

0.32

35 C¹

¹MBM on-die temperatures.

Die Simulator results place the Scythe Kamaboko in the mid-upper rank of P4 heatsinks tested to date (Heatsink Ranking).

CONCLUSIONS

Scythe’s Kamaboko Heatpipe is a good choice for CPU cooling. The rheostat is a nice touch – at its lowest speed, the fan is almost noiseless – a good idle setting.

Thanks again to Scythe for sending this our way.

²Note that manufacturers measure fan noise usually 3 feet from the fan.

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