Scythe Kozuti Low Profile CPU Heatsink

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Scythe Kozuti Low Profile CPU Heatsink

June 20, 2011 by Lawrence Lee

Scythe Kozuti
CPU Cooler
Street Price

With the demand for diminutive mini-ITX systems growing in the DIY community, the issue of CPU cooling often comes up. There are a few enthusiast class mini-ITX cases with room for high power graphics cards and bulky CPU heatsinks, but they're pricey and bigger than many may deem necessary. Most mini-ITX cases are sleek and slim, presenting a tricky problem for users, particularly those who prefer whisper quiet machines. Keeping a modern processor cool in a tightly confined space with an adequately low noise level is no small feat.

While some mini-ITX cases can fit fairly capable coolers like the Scythe Shuriken and Big Shuriken, they are far from the norm. Most are slim desktop style models powered using an external power brick and just tall enough just for the board and its I/O panel, with a maximum CPU heatsink height of about 40 mm. Larger variants like the Apex MI-008 are also popular, packing an SFX power supply directly over the top half of the board with around 46 mm of clearance. This is conveniently the same height as the stock heatsinks that ship with the bulk of Intel's current processor lineup (Intel chips are more common for these types of builds due to their superb energy efficiency).

The box.

The Scythe Kozuti is the first candidate we've seen that might have the capability of beating one of these low profile stock coolers while generating better acoustics. The latter shouldn't be hard as stock cooling units are their well-known for being lousy when it comes to noise. The Kozuti is built in the same mold as the Shuriken and Big Shuriken but with smaller dimensions. It features three copper heatpipes, 57 aluminum fins, and stands just 40 mm tall.

The catch? A puny 80 mm fan with an anemic thickness of just 10 mm strategically placed under the fins blowing air directly over the base, rather than through the fins. There is some evidence that this can work as the Noctua NH-C14 performed similarly with one fan whether it was above or below the main fin-stack. The Kozuti will attempt to repeat this result but on a smaller scale.

Package contents.

The Kozuti ships with the necessary mounting hardware, a packet of thermal grease and a simple paper instruction manual. As you can see from the presence of bolts and rubber washers, a hard-mounting system is used for both Intel and AMD installations. Bolts go through the back of the motherboard to secure the heatsink, though no backplate is included as the heatsink's low weigh presents no risk to the PCB.

Scythe Kozuti: Key Features
(from the product web page)
Feature & Brief
Our Comment
Super Low Profile CPU Cooler
only 40 mm in height
It's not quite 1U heatsink size (29 mm), but perfect for most low profile cases.
S.F.M.S. (Stealth Fan Mounting Structure)
By introducing the newly developed S.F.M.S. a super mini cooler -no taller than 40mm - is achieved by mounting a fan directly under the fins, which is compatible with more small form factor PCs, such as Mini-ITX case, slim case, etc.
Placing the fan underneath the main fin-stack saves space and allows direct airflow over the CPU socket.

E.I.S. (Easy Installation with Screw)
Easy and safe installation with screws instead of using a backplate.

At 250 grams, the heatsink isn't heavy enough to bend the motherboard PCB so a backplate isn't necessary.

Fan speed is automatically regulated by the PWM signal of the mainboard. Equipped with new 80 x 10 mm fan, operating within the range of 800 to 3300 rpm, dependent on load.

Complies to RoHS standard. That's nice.

Scythe Kozuti: Specifications
(from the product web page)
Model Name: Kozuti CPU Cooler
Model No.: SCKZT-1000
Manufacturer: Scythe Co., Ltd. Japan
Compatibility: Intel®:
Socket 775
Socket 1155
Socket 1156
Socket 1366 AMD®:
Socket AM2
Socket AM2+
Socket AM3
Accessory: Installation Guide, Thermal Grease
Overall Dimensions: 110 x 103 x 40 mm /
4.33 x 4.06 x1.58 in
Weight Included Fan: 250 g
Model Name: PWM 4-pin fan
Model No.: SY8010SL12M-P
Fan Dimensions: 80 x 80 x 10 mm
Fan Speed: 800 (±30%) - 3300rpm (±10%) - regulated by PWM
Air Flow: 6.0CFM ~ 24.82CFM
Noise Level: 8.2 ~ 32.5dBA
Input Power: 2,4 W
Input Current: 0,20 A
Voltage Range: 12 V

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