AsRock BC250 Wind Tunnel Case - VESA TV Mountable Slim Design!

ASRock BC250 Crossflow Steam Machine Case

Why Does This Exist?

I designed this case for my own BC250 Steam Machine build and to fit in the space behind my Hisense U6N television.

Many existing BC250 cases point a large fan at the board and expect the air to turn 90 degrees through the heatsink. The original BC250 cooler was designed for server-style crossflow, so I built this enclosure around that same basic idea.

Two 92 mm fans push air directly through the case, across the cooling hardware, and out the opposite end. The intake, internal ducting, cooler openings, and exhaust were all designed together as one airflow path.

Designed Configuration

This version was built and tested around:

• ASRock BC250

• Snowman MC75-8 CPU cooler

• My BC250-to-AM4 cooler adapter

• Two 92 mm ARCTIC fans (P9 PWM PST)

• Stock BC250 heatsink cut into three sections

• Original outer heatsink sections cooling VRMs

• Original center section cooling the rear GDDR6 memory

• Apevia 500W FlexATX power supply

• 400 mm VESA mounting behind a Hisense U6N television

The Snowman MC75-8 fins were opened at the ends to work with the case’s crossflow layout. An unmodified cooler will restrict airflow and is not the configuration I tested.

Hardware Required

To build it as I configured it:

• M3 Screws (From M3x8 to M3x45)

• M3x4x5 Brass Heatset Threaded Inserts

• Apevia Flex ATX PSU

• 92mm High Static Pressure Fans

• Latching ATX Power Switch

• 3D Printer - Core One Tested

• Quality Filament

Modular Design

The enclosure is split into several joined sections with alignment features and heat-set inserts. This made it printable and leaves reasonably approachable sections for anyone wanting to redesign the fan intake, PSU compartment, ducting, or cooler clearance.

CAD files are included for exactly that reason.

Mounting Options

The primary mounting system was designed specifically around the 400 mm VESA pattern and available space behind my Hisense U6N.

I cannot guarantee that it will fit behind another television. VESA mounting-hole spacing is only one part of the equation. TV shape, port locations, screw engagement, wall-mount hardware, ventilation, and available clearance all matter.

Basic desktop feet are also included, although the complete case is approximately 514 mm long. It is technically desktop-friendly, but it is not particularly small.

If installing it behind a television, properly support the TV before loosening any mounting hardware. Verify the installation carefully and use the files at your own risk.

Print Parameters

• 0.2mm Layer Height (APU Cooler "wing" should be 0.15 / 0.12mm due to overhang angle)

• 20% Infill (Adaptive Cubic recommended to reduce material use)

• 3 Walls / Perimeters on the Main Case section (For strength)

• 2 Walls / Perimeters on the rest of the Case Parts (lighter)

• 5 Walls / Perimeters on the VESA Mount parts (strength)

• PETG filament recommended at a miniumum, ABS/ASA would be a good choice as well.

• RIGID filament recommended for the VESA mounting. I used Prusament PC-CF

• 3MF Files included for the Filters to help slice them.

Project

This case was created for my BC250 Steam Machine project, turning an unusual mining board into a SteamOS couch-gaming system.

Full build video: 

Support My Work

If these files save you some design time, you can find all of my links here:

• All My Links

• Ko-Fi

• Patreon
  

Affiliate Disclosure

Some links in this listing may be affiliate links. If you purchase through them, I may receive a small commission at no additional cost to you.

License

Released under the Open Community License v1.1 + General Attribution v1.

Redistribution or derivatives must follow the applicable license terms and include attribution to Alan Mandic / MandicReally, with a link back to this listing.

Commercial sale or replication of these files or their derivatives requires a separate agreement. The complete license terms control if this summary differs from the license.

This is an unofficial community project and is not affiliated with or endorsed by ASRock.