Guardian 921RB

Mid-Sized Tower





Black Steel Mid Tower

NZXT celebrates the rebirth of the Guardian 921 with the renewed Guardian 921 RB.  Expanded upon its predecessor, Guardian 921 RB reflects the gamer design, structural integrity, and temperature monitoring system of the original while displaying a wide range of new features to complete the system builder’s dream budget case.  New features include a bottom oriented power supply mount, CPU heatsink cutout, and an extra 140mm fan slot.  Game beyond your limits with Guardian 921 RB.


NZXT Crafted Series Design: NZXT's latest addition to the Crafted Series takes cues from gaming culture with elegant curves and a newly designed clear side panel
Spacious Interior and Solid Construction: Built from solid .88mm and 1.00mm steel, the Guardian 921 gives the user ample space for large, high-end video cards and space for up to four internal hard drives
Constant Temperature Monitoring: Three temperature probe monitoring system allows the user to constantly gauge thermals within the system at all times to prevent overheating
Multimedia and peripheral inputs: E-SATA, Intel HD audio, mic, and two USB inputs are standards with the Guardian 921 allowing for maximum peripheral input
Silent Cooling: Comes standard with 3 120mm fans installed to maximize cooling performance with minimal noise
Updated Design: The all new Guardian 921 RB features a bottom mounted PSU, CPU heatsink cutout, and an extra slot for a 140mm fan at the top for more cooling performance. The all new Guardian 921 RB comes in both red/blue LED combinations




Tech Spec.

Size Mid Tower
Model Number 921RB-001-RD Red LED
921RB-001-BL Blue LED
Drive Bays 9 DRIVE BAYS
Cooling System FRONT, 1 X 120 mm LED FAN [Included]
REAR, 1 X 120 mm FAN [Included]
SIDE PANEL, 1 X 120 mm LED FAN [Included]
TOP, 1 x 120/140mm
Clearance CPU COOLER CLEARANCE 144.4mm (with fan) 169.4mm (without fan)
Dimensions 206mm(W) X 459mm(H) X 522mm(D)
Material SECC Steel, ABS Plastic
Motherboard Support ATX, MICRO-ATX, BABY AT
Expansion Slots 7
External Electronics 1 x Audio/Mic, 2 x USB 2.0, eSATA, Temperature Display
Product Weight 8.2 kg
Warranty 2 years

Expert Reviews (3)

  • Overclocker's Club (OCC)

    Overall, the NZXT Guardian 921 is a very good case that merits consideration when shopping for a new case. It is not far from being perfect. I would recommend it to anyone in need of a new case. more..

  • Tech Power Up

    The NZXT Guardian 921 is an interesting looking case. The LCD display is well placed and can be easily read, while the door looks much like a shield. NZXT has designed a very nice case with more..

  • Club Overclocker

    The NZXT Guardian 921 is a welcome refresh of the chassis that first introduced us and much of the world to NZXT. While some more..

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