Cooler Master BC 140 Red Test and Review

So, what is actually the Cooler Master BC series?

A very long time ago the guys from Cooler Master introduced the so called BC series, which is actually the very basic fan series in the company portfolio made to offer quality build case fans with various dimensions and technical features:

  1. 80mm models: Overall there are 4 completely transparent models with dimensions of 80mm with blue (R4-BC8R-18FB-R1), red (R4-BC8R-18FR-R1), white (R4-BC8R-18FW-R1) and green (R4-BC8R-18FG-R1) backlight, working at 1,800 ±10% revolutions per minute, with airflow level of 21.7 CFM ±10%, static level pressure of 1.62 mmH2O ±10% at only 19 dBA.
  2. 120mm models: There are 4 completely transparent models with dimensions of 120mm with blue (R4-BCBR-12FB-R1), red (R4-BCBR-12FR-R1), white (R4-BCBR-12FW-R1) and green (R4-BCBR-12FG-R1) backlight working at 1,200 ±10% revolutions per minute, with airflow level of 44.6 CFM ±10%, static level pressure of 0.96 mmH2O ±10% at only 21 dBA.
  3. 140mm rifle bearing models: The 140mm BC fans offer 4 models with blue (R4-BCDR-10FB-R1), red (R4-BCDR-10FR-R1), green (R4-BCDR-10FG-R1) backlight and a completely black (R4-BCDR-10FK-R1) version with rifle bearing working at 1,000 ±10% revolutions per minute, with airflow level of 44.6 CFM ±10%, static level pressure of 0.72 mmH2O ±10% at only 21.8 dBA. Apart from that there is one more model (R4-BCDR-18FK-R1) working at 1,800 ±10% revolutions per minute, with airflow level of 77.7 CFM ±10%, static level pressure of 1.95 mmH2O ±10% at 29.2 dBA.
  4. 140mm dual ball bearing models: The 140mm models offers 2 additional fans (R4-BCDD-10FK-R1 and R4-BCDD-18FK-R1) with dual ball bearing working at 1,000 ±10% revolutions per minute, with airflow level of 42.2 CFM ±10%, static level pressure of 0.70 mmH2O ±10% at only 19.6 dBA and at 1,800 ±10% revolutions per minute, with airflow level of 77.7 CFM ±10%, static level pressure of 1.95 mmH2O ±10% at 31.3 dBA

For this test and review I received a 140mm rifle bearing model working at 1000 revolutions per minute with the red (R4-BCDR-10FR-R1) backlight which I am really eager to test and review. So enough with the history lessons, let’s do some work.


Cooler Master BC 140 Red model arrived to me in the pretty standard for the company package – a transparent plastic box through which we can see the full fan structure and a carton cover hiding the additional accessories provided with the fan.

As usual, on the front side of the carton part there are the main technical details regarding the product, including information about the backlight colour, while the full technical specifications are placed on the back side of the carton cover.


And this is what the fan looks like out of its package:


I believe it is time to pay some attention to the fan structure and its features.

Cooler Master BC 140 Red have a pretty standard completely transparent square 140 x 140 x 25mm frame made to be installed on a 140mm case fan slot or on a bigger CPU cooler using four metal screws or four rubber dumpers. The frame itself is equipped with four LEDs on each side of the frame providing a very nice and smooth red backlight. All of the LEDs are powered directly from the 3 pin non-sleeved cable together with the fan motor when plugged to the motherboard header or directly from a PSU molex connector.


Apart from the completely transparent frame, Cooler Master BC 140 Red is also supplied with a completely transparent propeller offering  7 very wide and still not very sharply angled blades and according to my experience with this propeller design I expect to see a fan providing average airflow level, with average static pressure level while working at extremely low noise level. If this is so, we will find out a bit later.

The connection between the propeller and the frame is done with a rifle bearing to provide nice, reliable and silent operation up to 40 000 hours when installed as a case fan or as a CPU cooler fan. Very impressive to be honest. Of course, I can’t really check on that but I think we can trust the manufacturer.


The standard package content for this product is made of:

  1. 4 metal screws for installing the fan on a case fan slot
  2.  a 4-pin molex connector to 3-pin power connector on which only 2 pins are connected

I believe it is time to do some testing.

The tests will be conducted in my standard way. I will mount the fan and test it at 5V/7V/9V/12V and my goal will be to check the performance of the fan in real conditions. The product will be tested under close-to-perfect conditions, not taking into account any external factors. The results achieved during the test can in no way be the same if the fan is mounted on a cooler or on the case fan hole of any modern computer case. I will measure the amount of air going through the fan for one hour and its speed. For this I use a fan controller, a voltage meter, an anemometer and a stand made specifically for this purpose.

And this is what the fan looks like installed on my test stand:


The test results are shown in the following charts:

Airflow through the fan at 5V, 7V, 9V, 12V

Cooler Master BC 140 Red A

Propeller rpm during the tests at 5V, 7V, 9V, 12V.

Cooler Master BC 140 Red R

The anemometer showed the following air speed:

Cooler Master BC 140 Red S

After the fan was installed onto the stand and left to run for about 30 minutes at maximum speed, it was time for the tests to begin.

As with my other tests, again I started with a gradual increase of the voltage through the Lamptron FCT starting at 0V and Cooler Master BC 140 Red made at least one full revolution at about 6V and to do the first test I had to decrease the voltage to 5V.

Test at 5V:

At the first test conducted at 5V the model provided average airflow level of 28.8 cubic metres per hour at average 510 revolutions per minute. At these revolutions per minute the fan was absolutely silent.

Test at 7V:

The second test, conducted at 7V made the fan rotate at 660 revolutions per minute and providing airflow level of 41.76 cubic metres per hour. At this test the fan remained absolutely silent.

Test at 9V:

At the third test, conducted at 9V the fan reached up to 840 revolutions per minute with airflow level of 53.28 cubic metres per hour. At this test again the fan remained absolutely silent.

Test at 12V:

The last test done at 12V made the fan reach its maximum performance with airflow level of 71.52 cubic metres per hour, while rotating at 1050 revolutions per minute. At this test there was a tiny noise coming out from the air passing through the propeller.


After I am done testing, it will be nice to share my conclusions:

Cooler Master BC 140 Performance:

After I finished doing the tests all I can say is that Cooler Master BC 140 is the typical case fan made to provide a steady and reliable performance for a very long time, combined with its very low noise level when installed as a case fan and boost the airflow inside every modern case featuring 140mm case fan slot. Apart from that, the model can work when installed on a very big CPU heatsink but only for a pretty cool processor and I definitely can’t recommend it to be used for cooling an overclocked or extremely overclocked processor. It just doesn’t offer enough airflow and static level pressure.

Cooler Master BC 140 appearance:

The fan itself offers a very clean, transparent and simple design made to stay neutral to the overall machine appearance and together with the additional red backlight it could fit in every modern case or modding project using the black/red colour scheme. When the fan is working at maximum voltage the backlight is very balanced neither too bright, nor too dim.

As a disadvantage I could mention the lack of PWM control, which could improve the overall performance of the product when it is auto regulated directly from the motherboard.


I think Cooler Master BC 140 deserves the following reward:



Cooler Master BC 140  has been added to the 140mm catalogue.

Official price (MSRP) for Cooler Master JetFlo 120 : unknown

Official warranty: 24 months


I thank Cooler Master for the sample.

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Cooler Master BC 140 Red Test and Review
6.6 Total Score
Very good performance/ noise level balance

Noise level
Additional accessories
User Rating: 2.98 (3 votes)

Dobrin Krastev is the owner, reviewer and newsman of with more than 15 years' experience in personal computers, server and storage systems, UPS, peripheral devices and software. Passionate about testing and reviewing, AMD overclocking using AM3 990FXA and AMD FM2 A85X test systems and building modding projects.
1 Comment
  1. Reply n.milanov 20.11.2013 at 20:48

    Nice review and good fan overall!

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