Enermax T.B.SILENCE PWM (UCTB12B)
Enermax offers a PWM-regulated version of the T.B.SILENCE fan. Its packaging differs in the color of the paper insert:
There’s of course no speed controller inside while the rest of the accessories are the same.
The PWM version doesn’t differ externally from the ordinary Enermax T.B.SILENCE. The impeller and frame are identical.
The top speed is identical, too. It is 1500 RPM. The bottom speed of the PWM version is lower at 500 RPM. Therefore the minimum noise is only 8 instead of 10 dBA. There are no other differences except the part number on the sticker and the somewhat higher power consumption.
The impeller is detachable, like with the ordinary Enermax T.B.SILENCE.
After taking it off, you can see neat coils and two capacitors.
There are bonding pads for LEDs on the PCB. Enermax’s highlighted fans must be based on this platform, too.
The sleeved cable is 490 mm long. The retail price of the Enermax T.B.SILENCE PWM is $15.
GELID WING 12 PL (FN-FW12BPL-18)
The GELID WING 12 PL is packed into a robust plastic box with an individual compartment for its accessories. The text on the paper insert tells you about nano bearings, PWM regulation and highlighting. There's also a list of product specs there.
The accessories include screws, short silicone pins and a sticker with company logo.
Like most other fans in this review, the GELID WING 12 PL is manufactured in China. It is rather expensive at $22. The warranty period is 3 years.
The GELID WING 12 PL has a nice color of the translucent impeller but the latter is even visually smaller than the impellers of the fans we’ve already discussed.
Indeed, the 9-blade impeller is 109 mm in diameter. The motor is also small at 39 mm. The fan weighs 121 grams.
The tips of the blades are curved:
This helps reduce turbulence in the area between the blades and the frame and thus reduce noise. Moreover, GELID claims that such blades produce a higher static pressure. Indeed, the fan is specified to have a static pressure of 2.66 mm of water at the top speed of 1800 RPM. This is much higher than the static pressure of the Cooler Master Turbine Master MACH1.8 at the same speed, for example. The peak air flow is 75.6 CFM while the noise level is supposed to be no higher than 26.8 dBA. The fan supports PWM-based speed regulation. Its bottom speed is 600 RPM.
The fan’s nanoflux bearing uses cutting-edge composite materials with minimum abrasiveness, so it has a long service life of 100,000 hours and works quietly. The GELID WING 12 PL isn’t special in terms of its power requirements, though: 5.4 watts at 0.45 amperes.
The sleeved cable is about half a meter long.
The four LEDs make the GELID WING 12 PL even more beautiful.