Hardware Spec Index

Zephyra FN-6638 Ultra 140mm PWM Case Fan

Case Fans · Zephyra · SKU FN6638-ULTRA · Released 2021 · Updated 2026-10-22

Key facts

Benchmark index520 (Case Fans scale)
Category rank#11,888
Street price$19
Power4 W
Performance per dollar27.37
Released2021

Specifications

BrandZephyra
ModelZephyra FN-6638 Ultra
Size140 × 140 × 25 mm
Speed400–2,500 RPM (PWM)
Airflow120.0 CFM
Static pressure2.38 mmH₂O
Noise32 dBA
BearingRifle bearing
Connector4-pin PWM
Rated lifetime50,000 hours

Related guides

AIO Liquid Cooling vs Air Cooling for CPUs

Similar Case Fans

ModelBenchmarkPriceCompare
Teralux FN-6388 Plus 120mm PWM ARGB Case Fan1,027$29Compare
Caldera FN-2868 Prime 140mm PWM Case Fan (3-Pack)663$19Compare
Teralux FN-2445 SE 120mm PWM ARGB Case Fan (3-Pack)1,322$49Compare
Brontix FN-4157 Ultra 140mm PWM ARGB Case Fan (3-Pack)889$29Compare
Brontix FN-8527 SE 120mm PWM ARGB Case Fan1,147$39Compare
Teralux FN-9921 Ti 120mm PWM ARGB Case Fan (3-Pack)913$29Compare

All Case Fans · JSON

Cite this page: Hardware Spec Index, “Zephyra FN-6638 Ultra 140mm PWM Case Fan”, https://vextor7.com/item/1127614 (accessed 2026-10-22).