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Item#: N82E16811146069

NZXT Guardian 921 RB 921RB-001-RD Black SECC steel chassis Computer Case

  • SECC steel chassis
  • USB 2.0 / Audio / e-SATA Front Ports
  • 3 External 5.25" Drive Bays
  • 4 Internal 3.5" Drive Bays

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  • Overview
  • Specifications
  • Warranty & Returns
  • Reviews

The Guardian 921 is Reborn — Meet the Guardian 921RB

Guardian 921RB reflects the structural integrity, gamer-design, and temperature monitoring system of the original while displaying a wide range of new features to complete the system builder’s dream budget case. A host of new features boast a bottom oriented power supply mount, CPU heatsink cutout, and an extra 140mm fan slot.

Game beyond your limits with Guardian 921RB.

  • NZXT Crafted Series Design: NZXT's latest addition to the Crafted Series takes cues from the gaming culture with elegant curves and a newly designed clear side panel
  • Spacious Interior and Solid Construction: Built from solid 0.88mm and 1.0mm 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, enabling maximum peripheral input
  • Silent Cooling: Comes standard with three 120mm fans installed to maximize cooling performance with minimal noise
  • Updated Design: The all new Guardian 921RB 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

Learn more about the NZXT 921RB-001-RD

Warranty, Returns, And Additional Information
  • Warranty
  • Limited Warranty period (parts): 2 years
  • Limited Warranty period (labor): 2 years
  • Read full details

Customer Reviews of the NZXT 921RB-001-RD

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  • Waylon G.
  • 3/30/2016 11:02:49 AM

4 out of 5 eggsSuper nice case, build quality is awesome. Just like you'd expect from NZXT, but watch out for gfx space

Pros: Great build quality, NZXT never lets you down there. Cable management is fantastic. Plenty of drive bays for the average pro-sumer. Case is super sexy when lit up.

Cons: Not really a con against the case, but had to find out the hard way yesterday. A buddy ordered this for his new gaming rig. And ordered a new HBM based Fury. The card is absolutely massive... 12.25 inches with shroud, and not much smaller without it. Would not fit, at all, not even remotely. By nearly 2 inches. Wish the GPU accommodations were listed in the specs. We figured NZXT's were generally very spacious across the board(as i have used several in various builds over the past few years), and thought it wouldn't be an issue, but it definitely was. He had to jump up to the big daddy Phantom to make sure the card would fit.

Other Thoughts: Would like to see the gpu space listed for all cases across the board, but it is what it is... he already sold the case to another co-worker, so not really a big deal other than waiting a couple extra days for the new case to arrive.

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  • Josiah B.
  • 2/29/2016 2:24:17 PM
  • Ownership: more than 1 year
  • Verified Owner

3 out of 5 eggsIts a computer case.

Pros: Its size is nice could of been better utilized. The drive bays were simple and easy to use. Good case for any build not needing a big graphics card.The side panels are easy to take off and i really like the fact that the screws are able to be turned with your fingers and not a screwdriver.

Cons: Wire management is pretty tough with this case. If you have a bigger graphics card you will be tight for space. The drive bays are pretty much not accessible if you have a big graphics card. The case isn't great at letting air flow.

Other Thoughts: If you plan on having a water cooler, multiple graphics cards or any graphics card built for gaming i would advise a different case. It gets crammed for space and cluttered easily. Also a lack of air flow is this cases biggest problem.

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  • Piotr L.
  • 1/19/2016 6:49:01 AM
  • Ownership: more than 1 year
  • Verified Owner

4 out of 5 eggsGreat case but a bit loud

Pros: - Love the color scheme
- Roomy
- Easy to replace drives

Cons: - Sounds like a Jet Engine that is about to take off once I turn on a gfx intensive game. and I mean within seconds of me turning it on

Other Thoughts: Unsure if the jet engine is fully the fault of the case, but when I disconnected the side fan the noise level went down noticeably. Unfortunately then my cpu temp started climbing like crazy (to 65 degree C in about 10 minutes). Will replace the cpu fan for a quieter one and get back on this info

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  • marcus w.
  • 9/17/2015 5:56:10 PM
  • Ownership: 1 week to 1 month
  • Verified Owner

5 out of 5 eggsLove the case

Pros: This computer case comes pre-built with 3 cans and LED's looks wonderful for 70$ you can't go wrong with this case.

Cons: zero

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  • Victor C.
  • 8/7/2015 7:03:44 PM
  • Ownership: 1 day to 1 week
  • Verified Owner

4 out of 5 eggsGood Case

Pros: Works as advertised. LED lighting is nice.

Cons: Unable to take out drive bays if needed. Was too small for my long graphics card

1 out of 1 people found this review helpful. Did you? Yes No

  • Louis J.
  • 3/20/2015 3:55:41 AM
  • Ownership: 1 week to 1 month
  • Verified Owner

4 out of 5 eggsNZXT Guardian 921

Pros: The case quality is good for the most part. I personally am not impressed with any of the built in temp sensors in cases. These are just surface sensors that you tape to something you want to see the temperature from. I would rather use the on board sensors for this. My daughter did like the sensors and the way the case looks. We improved on the red color buy adding additional crystal fans with red LEDs that gave the case a much better glow.

Cons: None really

Other Thoughts: Make sure you look at all the pictures and understand the color is not as bright as some of the pictures show.

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  • Michael C.
  • 3/13/2015 8:18:36 PM
  • Ownership: 1 day to 1 week
  • Verified Owner

5 out of 5 eggs

Pros: that's a great case, good qualtity, I love it

Cons: don't seem to have Fan screws

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  • Phillip S.
  • 2/15/2015 5:10:38 PM
  • Ownership: 1 month to 1 year
  • Verified Owner

4 out of 5 eggsNZXT Guardian Red

Pros: -Very nice looking and well lit
-Able to lock side panel
-LED Temp sensors on front.
-Front door panel looks clean and hides drives.

Cons: -front speaker port only plays out of left speaker
-LED in 'Y' on front went out only after a couple months (and i dont see where to order a replacement LED)
-Kinda tight fit after you start adding PCI cards. (cable management is pretty bad)
-Wouldn't mind a Kingston lock slot

Other Thoughts: While i was able to fir the Cooler Master v8 gts in the case, the side fan stopped it from being able to close. solution found in Prolimatech's 15mm slim fan. (no LEDs but i have LED strips to compensate.)

0 out of 1 people found this review helpful. Did you? Yes No

  • Gabriel C.
  • 1/5/2015 2:56:19 PM
  • Ownership: more than 1 year
  • Verified Owner

4 out of 5 eggsGreat for the Cash; Looks like a Cylon

Pros: -Looks like a Cylon!
-Decent sensors, not overly tight for low-rise cards
-Add another 120mm fan on top with a red LED and it looks even more boss

Cons: -Uh, how many 5.25" bays do you think we need?
-Seriously only 3 bays for HDDs? Huh?
-Ratio of 5.25" to 3.5" is inverted, obviously
-Large profile cards make cable routing a nightmare

Other Thoughts: honestly for $70 and if you are clever with cable routing regardless of card choice, buy it.
Plus, if you're a BSG fan, you'll earn say we all.

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  • Paul R.
  • 12/9/2014 2:38:50 PM
  • Ownership: 1 week to 1 month
  • Verified Owner

3 out of 5 eggsGood Case Horrible Instructions

Pros: Fair amount of work space. According to guy who built computer for me. Visually appealing with LED lighting.

Cons: Horrible instructions. Website was not any better.

Manufacturer Response:

Hello, Valued NZXT Customer

We will pass on your suggestions to our PM team in regards to the instructions Manuel for the 921 Guardian. If at all any parts do fail or any side panels to become broken over time please visit our website at which then you will be able to submit a request for a parts replacement. We will also need an invoice uploaded as we base the warranty off the initial date of purchase which is 2 years. If you have any further questions or concerns feel free to contact our Support team at 1-800-228-9395.

NZXT Support

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Item#: N82E16811146069
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