Mechatronics MD1238H12B
The Mechatronics MD1238H12B is an industrial fan, included here to show the limits of the test system. At a certain point the Megahalems cannot produce further cooling without an enormous additional input of airflow (i.e. -- a lot more noise), and then you get only a small improvement. This fan demonstrates that effect. As for the fan, it is a fan-and-stator design with nine blades and 13 vanes. The effect of stator vanes is to increase static pressure.
Mechatronics says this about the MD1238 series:
• Features: high performance design
• Construction: UL94V-0 PBT impeller & frame
• Bearing option: ball bearing
• Connection: AWG 24,1007 lead wires
• Frame: reinforced flanged design
• Protection: thermal
• Options: tachometer output or locked rotor alarm
• Construction: UL94V-0 PBT impeller & frame
• Bearing option: ball bearing
• Connection: AWG 24,1007 lead wires
• Frame: reinforced flanged design
• Protection: thermal
• Options: tachometer output or locked rotor alarm
Product Page: Here (PDF)
The 1238 series are 38mm thick. The wires for this fan are standard fan wires, so now we know that standard fan wires are 24 AWG. Always useful information to have. Given that the fan draws 1.6 Amps (over 19 Watts), do not connect it to a header on your motherboard.
Nexus Real Silent Basic Series
The Nexus Real Silent 120mm fan is the standard fan for testing heatsinks at SPCR, as an example of a quiet fan that produces decent airflow.
Nexus says this:
The Nexus 120mm Real Silent Case Fan is the ultimate solution to bring some extra airflow in your quiet computer. Don't you just hate it when you have built a nice and quiet computer and it turns out that your high-end components are producing so much heat the temperatures in your computer case are getting too high? The Nexus Real Silent case fan is the solution for you. It provides the extra airflow your pc may require without being noticeable noise wise.
The Nexus 120mm Real Silent case fan is equipped with a double sided 4-pin power connector and a 3-pin motherboard connector. This allows you to connect the case fan directly to the power supply or to the motherboard.
The latest version of the Nexus Real Silent case fan comes in black and white and inside the package a set of 4 ultra-soft silicone Fan Mounts are supplied.
The Nexus 120mm Real Silent case fan is equipped with a double sided 4-pin power connector and a 3-pin motherboard connector. This allows you to connect the case fan directly to the power supply or to the motherboard.
The latest version of the Nexus Real Silent case fan comes in black and white and inside the package a set of 4 ultra-soft silicone Fan Mounts are supplied.
Product Page: Here
The model number and the look of the fan scream “Yate Loon,” but this fan is better than any sold under the Yate Loon name. This Nexus fan has a combination Molex and 3-pin plug power wiring (there is a picture at the link). Ideally this will allow the fan to draw power from the power supply while reporting its rpm to the motherboard; or simply to draw its power from either. Those four silicone mounts supplied with this fan are a fluorescent violet, and they are the very best vibration isolators you can buy, identical to the Deepcool vibration isolators except in color. Nexus sells a black set of those vibration isolators at various vendors. Of all the different ways of fastening a fan through its screw holes, these are the best.
Nidec Gentle Typhoon
Nidec manufactures the Gentle Typhoon as an industrial fan, and Scythe sells them to the general public. This is an unusual arrangement in that the Scythe name is on the box only once while the Nidec name is splashed all around, including on the fan. Scythe’s name is not on the fan itself. One consequence of this arrangement is that you can go to Nidec’s website to get actual manufacturer’s specs on some of these fans.
Nidec’s catalog offers the GT’s in three speeds -- 1450 rpm, 1850 rpm and 2150 rpm. Scythe sells these fans at lower speeds as well, but not the 2150 rpm. The GT’s need a higher rpm to produce the same cfm as other fans (compare them with Scythe’s Slip Stream fans, for example), but produce a larger static pressure compared to other fans with similar airflow. They run quietly, and retailers are always selling out, especially the 1850 rpm AP-15.
Scythe’s notes on Gentle Typhoons:
High Performance paired with low Noise Level - that's what the new GentleTyphoon Fans by Nidec Servo Corp. are about
High Performance:
The GentleTyphoon achieves high airflow volume and low noise with the newly designed impeller, enabling silent cooling of the latest devices which run very hot.
Silent Operation:
The GentleTyphoon has a different type of tone. The fan propeller is designed to reduce the disturbing frequency fan noise to human ears.
Innovative Technology:
The newly designed motor and motor support mechanism of the GentleTyphoon uses a double vibration reduction structure. The new support mechanism uses coil dampers to greatly reduce vibration.
High Performance:
The GentleTyphoon achieves high airflow volume and low noise with the newly designed impeller, enabling silent cooling of the latest devices which run very hot.
Silent Operation:
The GentleTyphoon has a different type of tone. The fan propeller is designed to reduce the disturbing frequency fan noise to human ears.
Innovative Technology:
The newly designed motor and motor support mechanism of the GentleTyphoon uses a double vibration reduction structure. The new support mechanism uses coil dampers to greatly reduce vibration.
Nidec’s comments:
The new Gentle Typhoon(TM) is a low power, low profile box fan made for your next generation project. It boasts a wide low-noise operating range and a vibration-absorbing structure. It is even environmentally friendly.
Nidec provides many more details Here.
Nidec manufactures their own fans.
The fans to be tested are models D1225C12B1AP-11 (500 rpm), D1225C12B2AP-12 (800 rpm), D1225C12B3AP-13 (1150 rpm), D1225C12B4AP-14 (1450 rpm), D1225C12B5AP-15 (1850 rpm), and D1225C12B6AP-00 (2150 rpm). That last is not sold by Scythe, but is included here as a comparison.
Scythe Product Page for AP-11, AP-12, AP-13: Here
Nidec Product Page for AP-14, AP-15, AP-2150: Here (PDF)
When Scythe sells fans they come with a set of four fan screws and a Molex pass-through with a power take-off for 3-pin fans. That adapter also has a wire and plug to transmit the rpm to the motherboard. These adapters are very useful as components of any number of projects.
