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SUPERMICRO CSE-731i-300B Black Mini-Tower Server Case

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  • 300W Power Supply w/ PFC
  • 2 x External 5.25" Drive Bays
  • 1 x 90mm Fans

Please note that this product is non-returnable and non-refundable.

  • Overview
  • Specifications
  • Warranty & Returns
  • Reviews

General information

SuperChassis 731i-300B from Supermicro

A mini tower chassis that accommodates micro ATX motherboard, this case allows you to build a power-packed server or workstation without the bulkiness of traditional server system. It features four full-height, full-length expansion slots, and has two 5.25" drive days and four 3.5" drive bays. A 300W Bronze level power supply and a 90mm rear fan are pre-installed for convenience. The case is also rugged built with quality materials and superb craftsmanship, guaranteeing durability and sturdiness you need to build a reliable, robust server system that’s able to go the distance.

  • 90° Rotatable HDD Cage
  • Whisper-Quiet (<25dB)
  • Kensington Lock Support
  • Front I/O Supports 2x USB 2.0
  • 1x Optional Front Intake 8cm (2800 RPM) PWM Fan
  • Mini-Tower Chassis Supports Micro-ATX Motherboard, Size 9.6? x 9.6?
  • 300W Bronze Level Certified High-Efficiency Power Supply
  • 1x Rear 9cm (2050 RPM) PWM Fan
  • 2x 5.25" External HDD Drive Bays & 4x 3.5" Internal HDD Drive Bays

Learn more about the Supermicro CSE-731i-300B

Warranty, Returns, And Additional Information
  • Warranty
  • Limited Warranty period (parts): 1 year
  • Limited Warranty period (labor): 1 year
  • Read full details
  • Return Policies
    • Return for refund within: non-refundable
    • Return for replacement within: non-replaceable
  • This item is covered by Newegg.com's Manufacturer Only Return Policy.
Ownership: more than 1 year
Verified Owner
5/ 5
Quailty Case 5/8/2017 2:30:10 PM

Pros: Perfect for mATX motherboard; hard drive bay swivels out for each access; soft-touch power button; quality steel case (like they used to make years ago). Quiet power supply

Cons: None really

Overall Review: Perfect for a small business server with space for up to 4 hard drives. Make sure you choose the model with the size power supply you need. 300w is enough for a entry level servers with a couple of hard drives and a single Xeon CPU motherboard. Iv'e built over a dozen servers with this case - I'm happy with the quality and hope they continue to offer this model in the future.

4 out of 4 people found this review helpful. Did you?
Ownership: 1 day to 1 week
Verified Owner
4/ 5
Nice but too small 8/17/2015 1:21:14 PM

Pros: Good solid case. I do like Supermicro. They makes nice chassis. I tried this with their CSE-M14TQC. No real complaints if it is what you are looking for.

Cons: I don't know who is at fault. I tried using a Intel S1200V3RPS server board and had a problem with the power supply. Even though the board only has one CPU Intel requires that both the 2x2 (or the one 2x8 as the case may be) have power. I had to buy and adapter. I don't think it is a Supermicro problem but since it is a "Server" case it would have been nice to have a 2x8 for the CPU power.

Overall Review: Case is too small for me. By the time I put a raid controller in it there just isn't enough room. Too crowded. BTW there is a place for a second fan. 80mm. Front bottom of chassis. You have to take the front bezel off to mount it.

1 out of 2 people found this review helpful. Did you?
Ownership: 1 month to 1 year
Verified Owner
4/ 5
Next to perfect 6/29/2015 9:28:13 PM

Pros: Compact but not too small
Swing out drive bay
Designed for Supermicro boards
Whisper Quiet Fan

Cons: Power supply seems too small for the amount of equipment and drives you can put in it.
No other places to mount a fan other than the one it comes with,

Overall Review: Both cons are subjective and not a real negative. CPU's are a lot less power hungry than they once were and even 4 15K SAS drives might not truly max out the PSU.

I checked the onboard temps of a recent build and the highest I saw was 46C so does it really need more than one fan. Given that you can pack an entire company into one of these with ESXi or Hyper-V I'd feel better with a second fan.

1 out of 1 people found this review helpful. Did you?
Ownership: 1 day to 1 week
Verified Owner
5/ 5
Excellent 3/26/2015 6:51:23 AM

Pros: I love this case, the build quality is excellent for the money, it's exactly what I have been looking for, and it doesn't rattle like some cases I've had in the past. I'm going to buy another one soon.

Cons: NONE

Overall Review: This case would also be nice for a regular PC build.

2 out of 3 people found this review helpful. Did you?
Ownership: 1 week to 1 month
Verified Owner
4/ 5
Great SOHO Server Case 1/10/2015 10:56:46 AM

Pros: This is a great little chassis/power supply combination. My obsessive-compulsiveness appreciates the lack of audio connectors and the lack of flashy blue LEDs, as well as the rugged construction and the overall easy of use/building.

Cons: While a lot of folks remark on how nicely this integrates with Supermicro boards, it didn't quite work out that way with my A1SAM-2550F. This wasn't horribly painful, but wasn't quite what I was expecting either.

It'd be nice if they included more than just the one fan, but it's hard to complain too much about that, considering the price.

I do miss the beautifully designed drive carriers that Fractal uses in their cases, but these aren't that bad either.

2 out of 2 people found this review helpful. Did you?
Ownership: 1 week to 1 month
Verified Owner
4/ 5
8/6/2014 3:42:35 PM

Pros: A nice simple and quiet case that is perfect for any build.

Cons: It would be nice if the drive bays were facing to the left like a lot of the newer cases out there. it makes updates drive faster and easyer

Overall Review: I would highly recommended this case for anyone building a
PC

Did you find this review helpful?
Ownership: more than 1 year
Verified Owner
5/ 5
Excellent Case 6/4/2014 8:47:52 AM

Pros: This case came with a power supply. It is sufficient for my needs. I've had it for about two years and have not had any issues with it. I really like the drive bays. It's very easy to remove/insert drives without the hassle of screws or removing the cage like other cases I've owned. I would definitely recommend this case. I bought this case for a Supermicro motherboard.

Cons: None

1 out of 1 people found this review helpful. Did you?
Ownership: 1 day to 1 week
Verified Owner
5/ 5
NAS build 4/17/2014 11:38:58 PM

Pros: For ninety bucks you can't go wrong.
It's heavy.. made of steel. Drive bays are a little flimsy but they got the job done.
Power supply was not going to work. 6 pin CPU plug wasn't enough for the MBD-X9SCL-F MoBo. Needs 8 pin so I dug in my stash and found a new 500 watt that worked perfect.

Cons: Power supply.
Screws were a little on the cheap side. Replaced with good ones from my stash.

Overall Review: I think it's a great value. Fits the SuperMicro MoBo very well. 4 slide out drive bays. Went together very quick and painless. Small size. Have it on it's side in my entertainment rack. looks like any other piece of equipment.
Fan is very quiet but moves lot of air.

1 out of 1 people found this review helpful. Did you?
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