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

Hi Folks!

Thank you for your patience. It’s been quite a long journey developing the FlexATX version. I had to wait for another BC-250 board to arrive because my previous system suffered a brownout after I accidentally caused a short circuit while investigating the FlexATX PSU.

Introduction A compact industrial-style enclosure designed for the AMD/ASRock BC-250. 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 for FlexATX power supply. 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 ~75°C under AAA gaming title load with 40CU enabled. Features - Fully 3D-printable enclosure

- Designed specifically for the AMD/ASRock BC-250

- Compatible with most FlexATX power supply

- Uses the stock BC-250 heatsink without modification

- Compact side-flow cooling layout

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

Cooling Performance Cooling performance is depending on frequency and enabled number of CUs. For a reference, the case was tested using FurMark at 1920×1080 resolution with an ambient temperature of approximately 28°C (82°F). Test Results: - 24 CU @ 1500 MHz (stock configuration): 76°C GPU temperature

- 40 CU @ 1500 MHz (modified configuration): 85°C GPU temperature

- Backplate (measured with thermistor) 53~57°C

Kits Available Official kit listing is available on eBay (currently U.S. only) This listing is owned by my family.

https://www.ebay.com/itm/236997099720

Updates - 2026-09-21 End cap panels with M16 switch hole

- 2026-09-13 lan-party-handle-bar_v1

⚠ Beta version: This part is still under testing. The design may be updated based on testing and feedback.

A simple carry handle for taking your BC-250 build to a LAN party. The handle uses the existing screw holes originally designed for the bottom legs, so no modification to the main body is required.

Since the handle reuses the bottom leg mounting holes, the case will be upside down while being carried. This is intentional.

Required hardware: - 4x M3 self-tapping screws for mounting the handle

- #6-32 UNC screws for securing the base to the main body

- 2026-09-04 body-rear-flex_v2.4_eps.stl

Based on user feedback, added more clearance around the power connector area on the v2.4 rear body. This allows the use of thicker power cables or an EPS connector for powering the BC-250 instead of the standard 8-pin PCIe connector.

The downside of this version is that the additional clearance may reduce the static pressure from the fan due to air leakage around the cable area. I recommend adding something like foam or sponge around the cables to seal the gap and maintain static pressure.

- 2026-08-02 Classic front panel with magnetic rail. I ditched this design but it is still good.

- Rear body end with side vents for PSU inhale. Mostly applicable for Metalfish's PSUs.

- Fan mountable magnetic front cover v2 (body-cover-with-120mm-fan-magnetic-v2.stl) Moving 2nd fan more front aimed to give some cooling SSDs and IO ports. Also you can put logo coin as well.

- 2026-07-26 Improved the FlexATX mounting holes to better accommodate dimensional differences between power supplies.

- 2026-07-11 HDD mounter fan Based on user feedback, an additional fan mounter using HDD mounter. It is ideal for backplate cooling or SSD cooling. For backplate cooling, must combination with the v2.4 body. Three sizes fan can be mountable (40mm/60mm/80mm)

- 2026-07-06 Fan guard Based on user feedback, a new fan guard is added.

- 2026-06-28 Easy switch panel Based on a user request, I designed a new front panel compatible with the widely available ATX 24-pin jumper cable with a power switch. Since these cables are inexpensive and easy to find on Amazon, this is probably one of the simplest power switch solutions for the BC-250. No soldering or custom wiring is required.