Akasa AK-161BL-S (Cool Blue Fan) Details Type: This product is designed as a replacement fan, primarily for chipset or Northbridge coolers. Dimensions: 40 x 40 x 20mm. Lighting: It features a crystal blue frame and blades with two high-bright blue LEDs that glow a "fantastic blue". Connection: The fan uses a 3-pin power connector. Noise Level: It is marketed as a "lo-noise" fan.