Scythe Kaze Maru
One more series of fans from a well-known Japanese Scythe Company is called Kaze Maru. These fans first came out in mid 2008; however, they haven’t yet become very popular among computer users. Although I think everything is still ahead of them. They are shipped in Scythe’s typical packaging: clear plastic box with a cardboard sheet inside:
Besides the fan, there is also a three-to-four pin PATA power connector and four self-tapping screws:
These fans are made in China.
Scythe Kaze Maru fan family includes three 140x140x25 mm models. These fans look very powerful and serious:
Eleven sharp crescent-shaped blades come out of the rotor with 49 mm diameter that sits on four curved supporting rods with a trapezoid cross-section. The fan frame is round with flat inside surface. It has four retention loops attached to it on the outside at 120 mm distance from one another. In other words, 140 mm Kaze Maru fans can be installed into 120 mm fan spots and that is the key peculiarity of these fans. However, in this case the frame should also fit into the 120 mm slot. This is certainly no issue for CPU coolers, but in system cases Kaze Maru may not always fit into the available fan slots because of the frame size.
Kaze Maru fans are represented by three models with 500, 1200 and 1900 RPM rotation speed. It is pretty strange that there is no 800 RPM fan in this family, because I think that this could be the most popular model offering moderate noise levels and impressive airflow for the fans of this speed. Kaze Maru fans weigh differently: 131, 137 and 175 g for the junior, medium and senior models, respectively.
The airflow from a fan working at 500 RPM should make 29.5 CFM, at 1200 RPM – 61.3 CFM and at 1900 RPM – 104.5 CFM! As for the noise, only the junior model can be considered quiet enough, as its declared noise level is 10.8 dBA. Faster fans will generate 26.6 and 41.1 dBA, respectively.
Unfortunately, there is no mention of the fans static pressure in the official specs. I think a fan of this size and with blades shaped like that should create pretty high static pressure:
As for the bearing and electronic components of the Scythe Kaze Maru fans, there is nothing special here. This model uses common sleeve bearing with 30,000 hours MTBF. The fan model number and supported current are printed on the rotor sticker:
The maximum power consumption of these fans is as follows: 500 RPM – 0.48 W, 1200 RPM – 2.28W, 1900 RPM - 2.88 W. The startup voltage for the 500 RPM model is declared at 8 V, and for 1200 and 1900 RPM models – at 3.5 V. The power cable is 300 mm long, but as you know, there is an adapter included with the fan that will add about 400 mm to that. Scythe Kaze Maru is priced at only $8.
Well, 140 mm fans from Thermaltake called TurboFan didn’t do too well in our tests. Let’s see if Scythe Kaze Maru fans will confirm the benefits of having a larger fan in your system. Here are the results:
Kaze Maru fans made a mixed impression. Firstly, they turned out different in the level of noise they generate and that comes not only from the difference in rotation speed. The junior and medium models works absolutely fine without any parasitic noises, which was not the case for the top model: we could clearly hear rumbling of its motor/bearing. Secondly, Kaze Maru failed to impress us with their airflow readings. They even lost to their 120 mm brothers and to 140 mm Thermaltake fan (working at the same speed, of course). Only the top Kaze Maru model performed well enough, though at a higher noise level. These fans were within the acoustically comfortable range at 780 RPM (excluding the rumbling model, of course). And as for power efficiency, only the junior solution could be considered economical. The fans startup voltages are 3.6 V, 2.1 V and 4.2 V, respectively. But still, why wasn’t there an 800 RPM fan among them?