Hardware Spec Index

Brontix CS-3991 Ultra ATX mid tower Case

PC Cases · Brontix · SKU CS3991-ULTRA · Released 2022 · Updated 2026-10-21

Key facts

Benchmark index1,046 (PC Cases scale)
Category rank#39,194
Street price$79
Performance per dollar13.24
Released2022

Specifications

BrandBrontix
ModelBrontix CS-3991 Ultra
TypeATX mid tower
Motherboard supportATX, Micro-ATX, Mini-ITX
Volume51 L
Max GPU length400 mm
Max CPU cooler height170 mm
Radiator supportTop 360 mm, front 360/420 mm, rear 120 mm
Fans included3× 140 mm
Front I/O1× USB 3.2 Gen 2 Type-C, 2× USB 3.0, audio
PSU supportATX (up to 220 mm)
Side panelTempered glass
Rear-connector boardsNot supported

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Cite this page: Hardware Spec Index, “Brontix CS-3991 Ultra ATX mid tower Case”, https://vextor7.com/item/7803479 (accessed 2026-10-21).