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Item#: N82E16811146070

NZXT Guardian 921 RB 921RB-001-BL Black SECC Steel, ABS Plastic ATX Mid Tower Computer Case

  • SECC Steel, ABS Plastic ATX Mid Tower
  • USB 2.0 / Audio / e-SATA Front Ports
  • 3 External 5.25" Drive Bays
  • 4 Internal 3.5" Drive Bays
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Learn more about the NZXT 921RB-001-BL


Guardian 921 RB


ATX Mid Tower
Case Material
SECC Steel, ABS Plastic
With Power Supply
Power Supply Mounted
Motherboard Compatibility
With Side Panel Window


External 5.25" Drive Bays
External 3.5" Drive Bays
Internal 3.5" Drive Bays
Expansion Slots
With front LCD display

Front Ports

Front Ports
USB 2.0 / Audio / e-SATA

Cooling System

80mm Fans
120mm Fans
1 x 120 mm Blue LED Front Fan
1 x 120 mm Blue LED Side Fan
1 x 120 mm Blue Fan

Physical Spec

8.11" x 18.07" x 20.55" (W x H x D)
18.08 lbs.


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

Quick Info


  • Limited Warranty period (parts): 2 years
  • Limited Warranty period (labor): 2 years

Customer Reviews of the NZXT 921RB-001-BL

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  • James B.
  • 7/5/2014 7:12:17 PM
  • Tech Level: Somewhat High
  • Ownership: more than 1 year
  • Verified Owner

4 out of 5 eggs

Pros: Nice case,lots of room.Easy to hide wires.

Cons: Fan on outer door had to be modified.Using a tall dual fan heat sink for cpu.Was just wasn't enough space.No biggy was able to modify fan to work.

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

  • Steven G.
  • 7/3/2014 7:01:32 PM
  • Tech Level: Somewhat High
  • Ownership: 1 month to 1 year
  • Verified Owner

4 out of 5 eggsAwesome!

Pros: This case is just about one of the best cases you can buy. I currently have a DVD drive and fan controller in the 3.5 bays and a multi-card reader in the 2.5. I also have a Radeon R9 270x Sapphire 4GB in as well. However, I still have plenty of room to hide the cables away, thought I have a sneaking suspicion that if I added too much more it might be a little crowded.

Cons: I deducted one egg for a few reasons. One being that there is no dedicated fan controller, not a huge issue as I bought an NZXT one that matches the case nicely, but still would have been nice. Second, even though it is an ATX mid, it still would be nice to have a little extra space to hide the cables, also the front fan was a little annoying to get out (not too bad though). And lastly, though this is super minor, it would be nice to be able to either change the color of the front lights or to be able to turn them off (preferably both). But you get what you pay for, and all in all, I have no regrets buying this case!

Other Thoughts: If you're looking to buy a case but don't want to drop a whole paycheck on a case, buy this!

Did you find this review helpful? Yes No

  • Jerrod C.
  • 6/22/2014 10:14:57 AM
  • Tech Level: Somewhat High
  • Ownership: more than 1 year
  • Verified Owner

3 out of 5 eggsDecent case, will leave you desiring more.

Pros: Blue LEDs
Swing out door on front
Options for fan upgrades (large size)
Options for liquid cooling expansion
Attractive side panel

Cons: Attracts dust often
Not much room on the inside for management
Larger GPUs will not fit
Front LEDs will flicker constantly after a few months.

Other Thoughts: For the price that I paid 2 years ago, this case is a decent, average case for a rig. After about 3 months, the front LEDs began flickering on and off, and still do to this day. It's a little cramped on the inside, but that's what I get for buying mid-tower as opposed to full-tower. Great case for your first build.

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

  • David A.
  • 6/13/2014 7:35:33 AM
  • Tech Level: Somewhat High
  • Ownership: 1 month to 1 year

4 out of 5 eggsDoes the Job but Not Perfect

Pros: + Rather Attractive
+ Blue lighted Fans
+ Fans are really quiet until they get close to max load
+ 3 Location Temperature Display on the Front
+ Tool-less drive bay locks

Cons: - Not much space for cord management
- Side panel behind the tray can be difficult to put on if too many cables routed around the back
- Won't fit really long GPU's
- Not much of a con but the side window is slightly tinted, which makes my LED lights seem less bright. (IMO if you have a side window, its because you like to see the components/aesthetics on the inside, why would a company think its a good idea to make it darker?)

Other Thoughts: I bought the case from a friend who was upgrading his system and never regretted it. Its not perfect but it ultimately does what it needs to and looks rather good while doing it.

I am a stickler for minimal cords and this case if HORRIBLE for cord management. Barely any space in the back once cords start bunching up in the same paths but with some creativity you can hide majority of them. All I had were power cords routed around the back and I needed to apply a good amount of pressure to get the side panel to slide back on.

Other than that, even at full retail price its a good deal as long as you don't mind seeing some of your wires in the main compartment.

Did you find this review helpful? Yes No

  • erik o.
  • 5/13/2014 5:41:51 PM
  • Tech Level: Average
  • Ownership: 1 week to 1 month
  • Verified Owner

5 out of 5 eggsLooks Good

Pros: -It feels nice and looks nice
-Allows for basic cable management.
-Tooless design feels a lot more reliable than other cases with tooless design
-Love the deeper blue lights instead of those brighter ones other cases usually have.

Cons: -The motherboard side of the case does not have those tooless screws for some reason, this is a feature I have seen in $30 cases yet this one decided not to include them

Other Thoughts: The lights match the RAIDMAX RX-635AP power supply very well if you are looking for a power supply to match it

Did you find this review helpful? Yes No

  • Justin S.
  • 3/23/2014 7:11:18 PM
  • Tech Level: Somewhat High
  • Ownership: 1 day to 1 week
  • Verified Owner

4 out of 5 eggsThe case is pretty

Pros: The case has a unique design
All the fans in use a almost completely silent
The system monitor display is a nice touch
The case is steady

Cons: Cable management is pretty tricky.
No usb 3.0
No ssd slot

Other Thoughts: Its a pretty sturdy case, its missing a few things that would match its current price tag.

Did you find this review helpful? Yes No

  • Tyler S.
  • 3/18/2014 3:17:56 PM
  • Tech Level: Average
  • Ownership: 1 month to 1 year

3 out of 5 eggsNZXT Guardian

Pros: The body is actually made of the Steel, except for the front, which is some type of plastic. It's somewhat lightweight, for a mid-tower. Side fan provides some extra breathing room. The expansion slots and HDD bays are very easy to manage, probably one of my favorite styles.

Cons: Well within 3 days of usage, the font LED with temps burned out. The fans are very loud, even at 40%. the front glossy cover and the side panel can are magnets to smudges and scuffs. But that shouldn't be a problem for most people. However, when you flip open the front panel it get very dusty, very fast. Again, this shouldn't be a problem for most people. Last thing, the front two USB ports are very loose, like when i plug in my phone charger the usb hangs out 1/4 the way. It scares me that one accidental bump might break the actual output or input connection. Might just be my model.

Other Thoughts: With these pros and cons listed, well not really listed, is an awesome case if you are just starting out. If you can buy it used or cheaper, go for it.

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  • Nathan W.
  • 3/14/2014 8:01:17 AM
  • Tech Level: Average
  • Ownership: 1 month to 1 year
  • Verified Owner

3 out of 5 eggsOK case

Pros: Nice looking case with good air flow. Price. Able to put all my extra cables into the side of the case. The temperature reading at the top works pretty well depending where you place the sensors.

Cons: It is a bit of a tight fit. I had a HIS IceQ 7950 that fit in there perfect. I then switched to a ASUS 780 and I had to do some case modifications. I also needed to upgrade my CPU heat sink. I decided to go with the Cooler Master EVO 212. It fit in there except I had to cut off the corner of my side fan in order to close the case.

Other Thoughts: If your looking to put in longer GPU cards or add certain CPU heat sinks I would look for a different case that has more room to work with.

Did you find this review helpful? Yes No

  • francis o.
  • 2/27/2014 8:15:37 AM
  • Tech Level: High
  • Ownership: 1 week to 1 month
  • Verified Owner

5 out of 5 eggslove it

Pros: its roomy, not flimsy at all and the lights work just fine. Great for proper cabling.

Cons: not really a con but it doesn't have great instructions.

Did you find this review helpful? Yes No

  • Thomas P.
  • 2/10/2014 7:38:19 AM
  • Tech Level: High
  • Ownership: 1 week to 1 month
  • Verified Owner

5 out of 5 eggsAwesome

Pros: This case is completely amazing. Everyone says it has little space; I however, have not had any problems fitting a full size graphics card, HD's, and Disk drives. I have gotten a bunch of compliments on it already. Overall, this case is absolutely sexy for the price, 60 bucks? where can you go wrong?

Cons: The instructions were made for someone who speaks Chinese. In other wards, they were mediocre at best.

Other Thoughts: If you purchase and are wondering what the little plastic tube lined LED looking things marked: CPU, HDD, SYS. Those are the thermometers, put them as close as you can to the designated hardware.

Did you find this review helpful? Yes No

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