Hardware Spec Index

Zephyra FN-4021 Pro 120mm PWM ARGB Case Fan

Case Fans · Zephyra · SKU FN4021-PRO · Released 2023 · Updated 2026-10-19

Key facts

Benchmark index1,027 (Case Fans scale)
Category rank#22,524
Street price$29
Power4 W
Performance per dollar35.41
Released2023

Specifications

BrandZephyra
ModelZephyra FN-4021 Pro
Size120 × 120 × 25 mm
Speed400–2,900 RPM (PWM)
Airflow98.6 CFM
Static pressure3.19 mmH₂O
Noise28 dBA
BearingRifle bearing
Connector4-pin PWM + 3-pin 5V ARGB
Rated lifetime150,000 hours

Related guides

AIO Liquid Cooling vs Air Cooling for CPUs

Similar Case Fans

ModelBenchmarkPriceCompare
Brontix FN-5802 Pro 120mm PWM Case Fan325$9Compare
Caldera FN-2079 Edge 140mm PWM Case Fan211$9Compare
Brontix FN-6023 Ultra 120mm PWM Case Fan253$9Compare
Brontix FN-8539 Plus 120mm PWM Case Fan680$19Compare
Brontix FN-2616 Max 120mm PWM ARGB Case Fan1,236$39Compare
Brontix FN-6762 Max 140mm PWM ARGB Case Fan (3-Pack)794$29Compare

All Case Fans · JSON

Cite this page: Hardware Spec Index, “Zephyra FN-4021 Pro 120mm PWM ARGB Case Fan”, https://vextor7.com/item/3553079 (accessed 2026-10-19).