Hardware Spec Index

Zephyra FN-9721 Ultra 140mm PWM Case Fan (3-Pack)

Case Fans · Zephyra · SKU FN9721-ULTRA · Released 2020 · Updated 2026-10-23

Key facts

Benchmark index441 (Case Fans scale)
Category rank#33,738
Street price$9
Power3 W
Performance per dollar49.00
Released2020

Specifications

BrandZephyra
ModelZephyra FN-9721 Ultra
Size140 × 140 × 25 mm
Speed500–1,700 RPM (PWM)
Airflow81.6 CFM
Static pressure1.61 mmH₂O
Noise22 dBA
BearingMagnetic levitation
Connector4-pin PWM
Rated lifetime50,000 hours

Related guides

AIO Liquid Cooling vs Air Cooling for CPUs

Similar Case Fans

ModelBenchmarkPriceCompare
Brontix FN-1142 Max 140mm PWM ARGB Case Fan1,141$49Compare
Brontix FN-6505 Pro 140mm PWM Case Fan (3-Pack)821$29Compare
Zephyra FN-6137 Plus 120mm PWM Case Fan642$19Compare
Zephyra FN-2762 Pro 120mm PWM ARGB Case Fan1,347$49Compare
Teralux FN-3624 Edge 120mm PWM ARGB Case Fan (3-Pack)881$29Compare
Caldera FN-6857 Ti 140mm PWM Case Fan667$19Compare

All Case Fans · JSON

Cite this page: Hardware Spec Index, “Zephyra FN-9721 Ultra 140mm PWM Case Fan (3-Pack)”, https://vextor7.com/item/254510 (accessed 2026-10-23).