NZXT RF-U42HF-B1 F420 RGB Core 420mm case fan

What this product is

The NZXT F420 RGB Core is a single-frame case fan unit containing three 420mm fans. It suits builders who want high airflow and RGB lighting across a 420mm radiator or case mount without managing three separate frames. Buyers needing a smaller radiator size or a non-RGB alternative should look at other models in the range.

The specification that decides fit

Each fan delivers 98.61 CFM at up to 2,000 RPM with a noise level of 34.5 dBA. Fluid dynamic bearings and a minimal blade-to-edge gap balance airflow and static pressure for liquid-cooling radiators. The unit requires an 8-pin PWM and RGB connector, so the motherboard or controller must provide that header.

Installation and common pitfalls

The single-frame design reduces cable count to one 8-pin connection for PWM and RGB control. An included splitter allows 5V ARGB motherboard connection if an NZXT controller is not used. Zero RPM mode and CAM software control require a compatible NZXT controller or motherboard, sold separately.