nyacom's AMD BC-250 Industrial Style Case (Without stock cooler modification)

Introduction

This repository is Meanwell LRS-350-12 Version. If you are looking for FlexATX version, please check this out. ⚠⚠⚠

A compact industrial-style enclosure designed for the AMD/ASRock BC-250 accelerator.

This case was built around the original BC-250 heatsink, allowing the card to be installed without any heatsink modification or custom cooling hardware. The side-flow airflow design uses a large intake fan to push air directly through the stock heatsink for efficient cooling in a relatively compact enclosure.

The enclosure is designed around the Mean Well LRS-350-12 DC power supply which can easily you can find in Amazon

Despite the compact footprint, the case can also accommodate an optional internal 3.5-inch HDD for large local storage capacity for AAA title games — ideal for DIY steam machine or local LLM node.

Even with a single-fan cooling design, the enclosure maintains BC-250 temperatures around ~70°C under gaming load.

Updates

08/02/2026

- Updated front and rear body sections for better rigidity (added screws to connecting front and back sections)

06/13/2026

- Improved for power cable management of rear body

- Fixed misaligned BC-250 fixture hole

05/28/2026

- FlexATX version (working in progress) available!

05/13/2026

- Added rear panel vents to improve airflow to the PSU

- Improved the AC-01 fittings on the rear panel

- Added a removable magnetic front cover with a new design, along with rail system. This can be retrofitted onto the existing front body. Requires 12pcs of 8mm x 2mm neodymium magnets ( Amazon )

- Added a new design HDD mounter for 3.5 and 2.5 drives

Features

- Fully 3D-printable enclosure

- Designed specifically for the AMD/ASRock BC-250

- Compatible with the Mean Well LRS-350-12 PSU

- Uses the stock BC-250 heatsink without modification

- Compact side-flow cooling layout

- Optional support for a 3.5-inch high-capacity HDD

Print Notes

- PLA or PETG is recommended (high-temperature-resistant materials are not required)

- 5% infill is generally sufficient, but adding extra walls around self-tapping screw holes is recommended for better durability

Misc

- Custom WoL (Wake-on-lan) module project for BC-250 ( Github )

- FlexATX version Under development.. (I hope it coming soon... Now I'm waiting for coming my another BC-250 board from eBay...) I totally reworked for FlexATX support within the exactly same geometry of LRS-350-12 version and better cable management..

Assembly Notes

- The stock fan direction of the LRS-350-12 PSU may need to be reversed for proper airflow within this enclosure. Change the fan orientation from intake to exhaust by opening the PSU cover and flipping the fan.

With a new design of back panel (with vents), you don't need to do this :)

How do I wiring?

Here is an example wiring chart. Please choose appropriate fuse for AC-01 in your AC environment.

How to insert magnets to front cover / rails?

I think the magnet insertion step is the most difficult part of the assembly process. This guide shares my method for assembling this part. I recommend using a small quick bar clamp. You can find one at almost any hardware store. (I bought mine at Dollar Tree for $3.)