The EK-Vardar EVO 120ER RGB is a high-static pressure computer cooling fan, designed and built primarily for highest-performance computer liquid cooling systems. Developed in-house and first introduced in 2014, the EK-Vardar fan is now also available as EK-Vardar EVO 120ER RGB. Beside the RGB lighting effect, the new fan also packs the Extended Range (ER) of PWM operation feature and the special Start-Stop function which brings a true 0dB experience for the absolute silent fan operation. EK-Vardar EVO 120ER RGB is simply the best choice of RGB fan for computer radiator cooling as it provides unmatched performance throughout the entire operating range.The perfectly balanced milky colored 7 fan blade design is optimized for light dispersion and high-pressure operation while maintaining the low noise profile throughout the whole operation range of the fan. Under the motor hub, there are total 9 LEDs making this the brightest RGB fan on the market, ensuring perfect light diffusion at broad daylight as well.One of the key features of the EK-Vardar RGB fans is its simplicity as it uses standard 4-pin 12V RGB connectivity. Meaning it can be used with any standard 4-pin 12V RGB controller or any of popular RGB sync technologies from all major motherboard manufacturers. The arrow marking on the 4-pin LED connector is to be aligned with the +12V marking on the RGB header.The Vardar family of cooling fans carries the notorious name of a type of the cold northwesterly wind blowing from the mountains down to the valleys of Macedonia. It is a type of ravine wind, enhanced by a channeling effect while blowing down through the Moravia-Vardar gap, bringing cold conditions from the north to the Thessaloniki area of Greece. Most frequent during winter, it is blowing in the rear of a depression when atmospheric pressure over eastern Europe is higher than over the Aegean Sea. Other key characteristics of the EK-Vardar EVO 120ER RGB fan are:- High-static pressure / low noise profile unlike other general-purpose computer cooling fans, the EK-Vardar EVO 120ER RGB fan is built specifically for computer liquid cooling systems, namely radiator cooling. The Vardars design and construction are also very suitable for high-performance air coolers or as case fans for restrictive cases with dust filters.- High-quality motor and bearing assembly New electrical design, actively cooled motor windings and the Double-Ball bearing with 50.000 hours of lifespan (MTBF) ensures uninterrupted operation for years to come. Precise Pulse Width Modulation (PWM) for fan speed adjustment allows performance on demand.- Sealed-edge fan casing The classic, yet effective square shape of the fan casing provides optimal performance in either pull- (suction) or push (pressure) regime without hydraulic losses thus ensuring the optimal cooling capacity of your liquid cooling radiators. The classic shape of the fan frame also allows easy cable routing while grouping more fans on one radiator.- Timeless design the EK-Vardar EVO 120ER RGB fan with its simple square frame fits into any liquid cooling computer without drawing too much attention to itself.- Standard RGB connection The Vardar RGB does not require any fancy and expensive additional RGB controller for you to enjoy vibrant lighting effects. A simple 4-pin 12V RGB connection for standard RGB controllers or any popular RGB sync technology from major motherboard manufacturers.- 0db regime - EK-Vardar EVO features a unique Start-Stop function which ensures the user a true 0db noise environment. When fan curve is set with the minimum threshold point below 25-30% PWM duty cycle (depending on motherboard model), the motor and the electronics will turn off and the fan will simply stop spinning. EK-Vardar EVO restarts operation automatically as fan control ramps up its operational duty cycle past threshold start-stop point. This feature is very useful for preventing radiator dust buildup in idling PCs and to prolong the lifecycle of the fan itself.Mechanical and electrical specifications:- Maximum speed: 2200 RPM (+/- 10%)- Rated Voltage: 12V DC- Power Draw: 2.16W- PWM Duty Cycle: 25-100% - ER (Extended Range)- Connector: 4-pin PWM header- Shaft bearing: Double-Ball bearing- Bearing durability: 50.000 hrs @ 40C (MTBF)- Dimensions: 120 x 120 x 25 mm- RGB cable length: 50cm- RGB connector classic 4-pin (12+ R G B)Performance characteristics:- Max Air Flow: 77 CFM = 131 m/h- Static Pressure: 3.16mm H2O = 31 Pa- Sleeved cable length: 300 mm- Noise Level: 33.5 dBAContents:- EK-Vardar EVO 120ER RGB 120mm fan- Self-tapping screws (4 pcs)Important- It is normal for the EK-Varda