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Item#: N82E16811147212

Rosewill Legacy U3-S-Window Silver Aluminum Alloy MicroATX Mini Tower Computer Case

  • M-ATX Mini Tower
  • Front I/O Ports, USB3.0
  • One Rear 120mm Speed Adjustable Fan
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With its simple surface, subtle curves, meticulous aluminum alloy build, attention-grabbing clear side window, and four gleaming metal stands, you'll fall in love with the Rosewill Legacy U3 mini tower case at first sight. But don't get fooled by its micro-ATX mini tower form factor; it's designed to support high-performance hardware effortlessly. Inside the chassis you'll find room to fit an M-ATX/ITX motherboard, standard PSII power supply, performance graphics card, and tower CPU cooler. A 120mm rear fan is pre-installed for efficient, quiet cooling. Along with the latest USB 3.0 connectivity on the front panel, the Legacy U3 is a great choice for your next PC build.

  • newegg Sleek Design The aluminum alloy construction with a clean design presents a high-quality feel and stylish appeal, making it great to build your HTPC or bedroom PC.
  • newegg Transparent Side Window Lets you show off your high-end components.
  • newegg Efficient Cooling One 120mm speed adjustable rear fan, with loads of air vents, delivers effective cooling for the system. The speed control is located behind the fan.
  • newegg Compatibility Accommodates an M-ATX/ITX motherboard (within 245mm x 245mm), standard PSII power supply, graphics card up to 260mm long, and CPU cooler up to 175mm high. Also includes two internal 3.5" drive bays.
  • newegg Front USB 3.0 Connectivity Two USB 3.0 ports and two audio ports on the front panel allow handy connection to peripherals.

Learn more about the Rosewill Legacy U3-S-Window


Legacy U3-S-Window


MicroATX Mini Tower
Case Material
Aluminum Alloy
With Power Supply
Motherboard Compatibility
M-ATX / ITX (within 245mm x 245mm)
With Side Panel Window


Internal 3.5" Drive Bays
Expansion Slots

Front Ports

Front Ports
2 x USB 3.0 Ports
Audio In/Out

Cooling System

120mm Fans
1 x Rear 120mm Fan
Side Air duct

Physical Spec

8.19" x 10.63" x 14.13" (W x D x H) (0.47" feet not included)
5.51 lb.


- Please make sure your motherboard equipped with on-board USB 3.0 socket before purchasing.
- For certain M-ATX motherboard with SATA connectors on the side, please use L-shaped SATA cables.
- CPU Cooler: Not Higher than 175mm
- Display Card: Not Longer than 260mm

Ideal for Intel & AMD Systems

Support Standard ATX PSII PSU

Sturdy Construction

Ventilations for Display Card. (within 260mm)

One Build-in Speed Adjustable Rear Fan

Front I/O Ports : 2x USB3.0, Audio Out, MIC in

Drive Bays:
- Side Plate: 1 x 3.5" HDD Rack
- Base Plate: You can install either 2 x 2.5" HDD or 1 x 3.5" HDD

Quick Info


  • Limited Warranty period (parts): 1 year
  • Limited Warranty period (labor): 1 year

Customer Reviews of the Rosewill Legacy U3-S-Window

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  • Shaun G.
  • 8/15/2014 1:07:42 PM
  • Tech Level: Somewhat High
  • Ownership: 1 day to 1 week
  • Verified Owner

5 out of 5 eggsAbsolutely stunning!

Pros: Simply amazing aesthetic! Nice and solid build quality. Nothings flimsy about the case at all! All necessary hardware is included.

Cons: In my build with this case I came across what I would consider to be two cons.

The first of which I forseen when purchasing the case. The case is very tight, making cable management and mounting of the hardware to be a bit difficult. Because of this I would definitely not recommend this case to anyone without prior knowledge of building a computer.

The second small con, at least to me. If using multiple hard drives and one of them is an HDD. The side bracket must be used for mounting. Basically, if running 1SSD/1HDD or 2HDD the side bracket must be used.

Neither one of these cons constitute enough to remove an egg!

Other Thoughts: Use of a modular /semi-modular power supply should be considered a requirement for this case.

I used an Corsair H80i AIO liquid cooler (Have to love Newegg sales!). The cooler is a tight fit even being a single 120mm cooler. (Side HDD bracket does not fit with this cooler as they hit. I have personally slightly notched my bracket so it will work, but then decided to use other options for HDD)

On the issue of the HDD mounting. I will be using a Rosewill brushed aluminum external HDD case. And either use one of the USB 3.0 ports on the rear, or running the power/sata connectors through one of the expansion slots on the rear of the case.

Hope you find this helpful!

Did you find this review helpful? Yes No

  • Kevin W.
  • 5/2/2014 6:08:35 PM
  • Tech Level: High
  • Ownership: 1 week to 1 month
  • Verified Owner

5 out of 5 eggsLove it

Pros: The size, relative to its minimal potential proximity utilization. Very rigid, it is immediately emphasized upon unboxing that the extreme level of quality is prevalent. It should be notated that this unit is capable of housing 2 2.5 inch drives, as well as a 3.5 inch drive, within normal building procedure.

dis tang ih preteh kuul do fo real yo

Cons: GPU dimension limitation. 10.5 inch maximum.

Other Thoughts: pretty sweet, this thing is higher quality than you are probably thinking, i was like ey doe when i opened it up.

1 out of 2 people found this review helpful. Did you? Yes No

  • Jeffry E.
  • 4/29/2014 12:11:21 AM
  • Tech Level: High
  • Ownership: 1 day to 1 week
  • Verified Owner

4 out of 5 eggsGood case, a few logistical failures.

Pros: Small
Lightweight but sturdy
takes standard size PSU (I Highly recommend modular)
I was able to squeeze a large air cooler, two HDD's and an SSD by mounting the SSD to the inside top of the case with velcro strips.
Because this case is pretty much just flat aluminum in many places, i could see some significant modding being done with this case.

Overall, I highly recommend this case to users with either one 3.5" drive, or two 2.5" drives. There is space to bottom mount two 2.5" drives, and this is really where the sweet spot is for this case. As soon as you add one 3.5" drive, it takes the whole bottom area of the case, moving any secondary drive up to the side mount slot . The side mount bracket disallows use of a 120mm radiator without structural modification, and places the secondary drive in the hottest area of the case. Add a second 3.5" drive, and now the height of a CPU cooler becomes fairly limited as it protrudes towards the motherboard from the side bracket. It gets pretty cramped pretty quickly.

Cons: 1: The mounting screw locations on the front edge are not used for mATX motherboards. The motherboard is instead allowed to flex very substantially under any significant pressure, so you will want to support the motherboard with your hand underneath when plugging anything in on the forward 2 inches.

2: This is a con that I really didn't foresee when purchasing this case. Because both of the intended hard drive mounts are nearly flush with a flat surface, there is very little clearance around the power connector on any sata device. Many power supplies have strings of 3 or 4 connectors on one cable, but the middle ones have wires protruding from both sides in a way which prohibits them from being used flush with a surface as in this case. So, in order for me to install 3 SATA devices, i had to use 3 completely separate modular SATA cables, since only the end connector could be utilized.

The work around for this is to buy some MOLEX to SATA adapters. This will allow use of just one single MOXLEX cable with at least 2 connectors, and two MOLEX to 2xSATA adapters to power up to 4 SATA devices. This will allow MUCH better cable management.

Other Thoughts: I bought this to replace a corsair 500R so i could fit my build into a smaller space. All the same components (except a mATX motherboard instead of the standard ATX) were placed into this case.

GPU and side mounted SSD temperatures rose by about 7C
CPU temperatures rose by about 4C
The bottom mounted HDD and top mounted SSD rose by about 2C.

The side aluminum attachment for the second HDD mount places that HDD on the periphery of the video card exhaust area, which leads to HDD temperatures in that spot in the 35-37 Celsius range (100 Fahrenheit). Furthermore, this HDD bay is set pretty far back in the case such that the HDD limits the height of the CPU cooler you can use, but also prohibits usage of a radiator on the rear 120mm exhaust area. I actually removed about 1.5 square inches of the top 3 fins on my CPU cooler which interfered with the side mounted HDD. It was pretty easy to make the cut, and it looks pretty clean, but I'd rather have not had to do that.Its possible that i may be able to put a small radiator like the corsair H60 on the rear if i cut some extra holes to move that side mounted hard drive forward by an inch or two, then remove a small 1/2" by 1" chunk of the spanwise support. Its worth reiterating at this point that none of these difficulties will arise if you simply do not have any 3.5" drives.

A bottom mounted 3.5"HDD will definitely interfere with a video card mounted in the botom PCIE slot on any mATX motherboard. so keep that in mind while planning your build.

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

  • charles n.
  • 3/25/2014 8:41:29 PM
  • Tech Level: High
  • Ownership: 1 month to 1 year
  • Verified Owner

5 out of 5 eggs

Pros: this is a very solid all aluminum case great build quality, nice having the side window

Cons: would have been nice to have at least one optical drive bay

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

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Item#: N82E16811147212
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