EK has 4 models in their Vardar 140mm fan lineup, and this is the highest speed version. It’s called Furious for a reason, and attempts to be a high performance retail 140mm fan option. This is also where we will see if that massive motor hub on the 140mm Vardars has an appreciable deadspot, and also if there is a particularly favorable fan orientation here. Thanks again to EKWB for providing a validation sample for testing.

Let’s take a look at the specs courtesy the product page:

Mechanical and electrical specifications:

  • Speed: 2500 RPM +/- 10%
  • Rated Voltage: 12V DC
  • Current Draw: 0.7 A
  • Power Draw: 8.4 W
  • PWM Duty Cycle: 25-100%
  • Connector: 4-pin PWM header
  • Shaft Bearing: Double-ball bearing
  • Bearing Durability: 50,000 hrs @ 40 ºC (MTBF)
  • Dimensions: 140 x 140 x 25 mm

Performance characteristics:

  • Max Air Flow: 143 CFM (244 m3/h)
  • Max Static Pressure: 5.28 mm H2O (51.8 Pa)
  • Noise Level: 48.4 dBA
  • Operating temperature: -10 to +70 ºC

Scope of delivery:

  • EK-Vardar series fan
  • self-tapping screws (4 pcs)

This may not be an -ER fan but that long PWM duty cycle is the first thing that caught my eye here again. There is also a nice comparison P-Q chart of where all the 120 and 140mm Vardar fans stack up against each other. As always, compare factory specs of fans within the same company itself and not across companies as no one seems to report whether ISO standard testing was adopted or not. According to this, the FF5-120 is capable of a higher static pressure rating (mostly because of the higher rated speed) but the FF4-140 has the maximum flow rate of any and this is where 140mm fans and radiators will also excel. As with the other Vardar fans, this is a 4 pin PWM controlled fan meant to run at a constant 12 V DC and has a square frame with a typical 25mm fan thickness making it compatible with 140mm size radiators out of the box. We also see the exponential increase in power draw with speed for anything rotating, with the 2000 RPM F3-140ER rated at 3.86 W but this 2500 RPM version rated at 8.4 W is going to require some research on fan controllers first. But let’s get to that and more on the next page.

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