In Win 503


Pros: High-end design \ Toolless

Cons: Lack of large radiator support / 1x USB 3.0 front port

In Win is definitely known for true craftsmanship. Their cases stand out among the community as interesting high-end enclosures. The 503 case is a main-stream case, but is worthy of high-end materials. It is a minimalist case with a modern design.This case comes in two available colors. They offer black and red, as well as a white and black. Lets take a closer look at what really defines the 503.

The specifications are as follows:

IN Win 503
CASE TYPE: Mid-Tower
MATERIAL:Tempered Glass, Steel & Plastic
WEIGHT: 5.9 kg
DRIVE BAYS: 1x External 5.25″
4x Internal 2.5/3.5″
2x Internal 2.5″
DIMENSIONS: 210(W) x 475(H) x 480(D)
FRONT DOOR/COVER: Sliding Glass Cover
FRONT FANS: 120mm x 2 (120mm fan x 1 pre-installed)
REAR FANS: 120mm x 1 (pre-installed)
BOTTOM FANS: 120mm x 1 (optional)
I/O: 1x USB 3.0
2x USB 2.0
1x Headphone
1x Microphone
FAN/LED Controller: N/A
Compatibility: CPU Cooler: 160 mm
GPU: 408 mm
PSU: 220 mm


The 503 was shipped in a standard packaged box. The inside of the package was well protected with decent Styrofoam, and a well placed bag of packaging materials.

The bag that holds of all of the accessories is a really decent sized bag that has a nice zip lock feature. Simple details like this really stand out, and make it easy to get to everything provided.

The contents inside the bag are as follows:
  • Detailed manual
  • Set of screws for building
  • Reusable zip ties
  • Speaker for motherboard
  • HDD tray shock proof mounts


Looking at the 503 more closely it is a thing of beauty. In Win usually designs their cases with tempered glass, and is well received by the enthusiast community. The front panel of the case is designed with the glass to keep the traditional In Win style.

The design of this case is fantastic. It offers a clean look and provides awesome attention to detail. Everything used in this case is strategically placed. I really enjoy the black and red color scheme as this will appeal to alot of people.

The 503 offers a large side window that provides plenty of room for system builders. The In Win logo is placed on the windows, and perfectly centered to the case. On the back of the case you will find a similar side panel that provides plenty of room behind the motherboard tray for cable management. This will provide a nice clean look, and will keep cables well hidden.

The front panel provides so much detail and beauty with the tempered glass. The panel does slide down with a simple push, which reveals the 5.25 " drive bay, and front panel connections.

The front panel I/O connectors provide:
  • USB 3.0
  • 2x USB 2.0
  • Audio Headphone and Mic jacks

The front panel is pretty standard. I would have really liked to see some more USB 3.0 ports. You will have to use the full USB 3.0 header for the single port, but the front does provide a nice clean look and feel.

The back of the case offers plenty of space for your components. I really like how the expansion slots offer easy access from a single screw. The back of the 503 offers:
  • 7x Expansion slots
  • PSU bay on bottom
  • Single 120 mm fan mount on rear
  • I/O slot for motherboards
  • External water cooling holes

I want to point out the top of the case does not offer water cooling support. This is a budget case and had to cut cost somewhere. You can mount a rear 120 mm radiator to the back of the case if desired, but the top does not offer support for more popular coolers like the AIO h100i V2.


To access the inside of the case is very simple, you just remove the thumb screws on each of the side panels. The interior of the case is very spacious, and offers a very traditional layout.

The interior offers ventilation for your PSU mount on the bottom. as well as another mounting point for fresh intake for another 120 mm fan. In order to take advantage of the extra fan your PSU can not be any longer than 170 mm. The bottom ventilation also has a conveniently removable dust filter.

The front of the case is easily removed, and offers extra mounting options for 120m fans with dust filters. There is a pre-installed 120 mm fan on the bottom mount for fresh intake. The front mounting option is toolless and features a quick release tab. The fans and filters can be easy to install with the mounting clips.

The hard drive is on the bottom right, and offers 2.5 " or 3.5 " mounting holes. There is a 2.5 " mount on the top of the cage, and is for your smaller hard drives like an SSD. I would have liked to see some more discrete options. The cage offers 4x 3.5 " mounts for your drives.

The top bay supports three 5.25 " drive bays, and supports an easy locking mechanism for easy mounting. Also there are the standard mounting holes for screws if needed for more equipment. It's important to note that only the top 5.25 " drive bay is for external use. The front slides down only far enough to allow this bay accessible.

The front panel connectors inside offer:
  • Power SW , Power LED , HDD LED
  • USB 2.0 header
  • USB 3.0 header
  • HD Audio header


Working inside the case was very simple and well laid out. Mounting a motherboard is very easy using the pre drilled mounting points. Installing drives was simple due to the toolless design for 3.5 " drives. If you want to mount more 2.5 " drives other than on the top of the cage, you will need to use the regular screws instead.

Installing an optical drive was a breeze with the locking clip requiring no screws to secure it. The PSU is very simply to install. It gets mounted with the fan down to proved the best ventilation options for airflow. routing cables to the motherboard is also straight forward and provides plenty of room and length behind the case.


Some negative things about the 503 is the lack of water cooling support for top mounted radiators. Most high performance radiators come in the 240 mm to 360 mm range. You do have the option to mount a 120 mm radiator in the rear, but this leaves a user limited to basic water cooling. The other thing I didn't like was the single USB 3.0 port on the front panel.

The 503 is a fantastic case for the price. This budget case offers high-end features at an affordable price. It offers nice design features, and plenty of room for building. The 503 is classy and elegant, and the side panel provides an inner view of the chassis. It can really show off your high-end components. The front sliding panel being tempered glass provides a nice simple look and feel. What I loved the most was the ease of use for installing the front 120 mm fans and dust covers. The 503 is definitely worth your time and money for your next system build. It can be found on newegg for $59.99.
In Win 503

Mid ranged chassis with high-end features.

Model Name/TypeMPNEAN/UPC