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Guardian 921RB

Reborn Guardian ATX Mid-Tower gaming case with temperature monitor

  • 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.


SizeMid Tower
Model Number921RB-001-RD Red LED
921RB-001-BL Blue LED
CA-GR921-R1 (Red-USB 3.0)
CA-GR921-B1 (Blue-USB 3.0)
Drive Bays9 DRIVE BAYS
Fan SupportFRONT, 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
ClearanceCPU COOLER CLEARANCE 144.4mm (with fan) 169.4mm (without fan)
Dimensions206mm(W) X 459mm(H) X 522mm(D)
SECC Steel, ABS Plastic
Motherboard SupportATX, MICRO-ATX, BABY AT
Expansion Slots7
I/O Ports1 x Audio/Mic, 2 x USB 2.0 (1x USB 3.0, 1x USB 2.0 on CA-GR921-R1 and CA-GR921-B1), eSATA, Temperature Display
Product Weight8.2 kg
UPC815671010711 (Red)
815671010704 (Blue)
815671010711 (Red USB 3.0)
815671010704 (Blue USB 3.0)
EAN5060301690435 (Red) 5060301690442 (Blue) 5060301690435 (Red USB 3.0) 5060301692460 (Blue USB 3.0)
Warranty2 Years
Manual Guardian 921rb MultiPDF7.36 MBDownload

Overclocker's Club (OCC)Small overclockersclub 10/20/2015

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 UpSmall techpowerup 10/20/2015

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 OverclockerSmall cluboc 10/20/2015

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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