Scythe SCNJ-1000 Ninja heatsink

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POSTSCRIPT: SCYTHE NINJA, version 3

Dec 16, 2006 by Kelly Stich

The original Scythe SCNJ-1000 Ninja heatsink has proven to be one of the most popular enthusiast heatsinks available. It is one of the best heatsinks that we have reviewed at SPCR in terms of cooling and potential for quiet operation.

The recently released Scythe SCNJ-1100P, also known as the Ninja Plus Rev. B, is the third version of the Ninja. This version is very similar to the previous version except for the mounting system. Now included are a Scythe branded fan, a redesigned mounting bracket for the LGA775 socket, and a new bracket for the AM2 socket.


Scythe's Ninja Plus Rev. B with LGA775 Adapter Attached.

The cooling provided by the Ninja has not changed; it is still one of the best heatsinks on the market. The basic design of the Ninja remains: Twelve heatpipes running through a stack of large, thin, widely spaced aluminum fins. The fin spacing is very similar, but the previous revision had a fairly big notch in the corners of the bottom fins for the built in native socket 479 clips, as shown in the photo below.

The weight of the new Ninja is 640g without the attached fan. The weight is mainly in the base and should not be a major concern if mounted correctly.

While the Ninja now has support for all modern desktop processor sockets, there have been a number of compatibility reports with the LGA775 and AM2 adapters; check with the compatibility data provided on Scythe website to confirm that this version will fit on your motherboard. The LGA775 mounting adapter can interfere with the VRM's of certain motherboards, and the AM2 adapter has also been shown to block some of the RAM slots.

When mounting, the easiest and safest method is to mount the Ninja on the motherboard outside of the case. This is especially true for the LGA775 adapter where you will need to make sure that the push-pins have been fully inserted and locked. The push-pins are awkwardly placed under the fins and inserting them correctly takes a considerable amount of force and dexterity. If the notches in the corners of the earlier version Ninja had been retained, inserting and locking the push-pins would be much simpler. A visual inspection of the push-pins on the underside of the board is required to ensure that the Ninja is secured in place.


An LGA775 adapter push-pin when fully inserted.

The Scythe fan included with the SPCR sample was a Scythe DFS122512L. This fan appears to be of medium quality, but does not fit the noise specification given on the Scythe website (Ninja and fan). The included fan has a slight buzzing sound at 12V, but is relatively quiet when undervolted. While the specifications are not exactly the same, the noise produced from this fan is very similar to the Scythe Kama Flow fan that we recently reviewed.

Overall this is a welcome revision to the Ninja heatsink; now the Ninja has support for all modern desktop sockets. The Ninja is still one of the best available heatsinks on the market. Cooling is superb, and with the included fan noise is acceptable. To ensure the quietest operation though, undervolt the fan to achieve near silent operation.

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