ASRock AMD BC-250 Cases 6.5L & 5.4L

Hello everyone! This is a case I designed for my BC-250. I wanted something compact and portable that I could easily take with me without sacrificing cooling, so I ended up making my own.

My BC-250 has been repasted and has the full CPU and GPU unlocked. I'm currently running the CPU at 3.5 GHz with a 1000 mV undervolt, and the GPU at 2 GHz with a 940 mV undervolt.

I'm using the 6.5L version of the case with only two Thermalright TL-C12CW-S 120mm fans on the heatsink side. The other side is empty. With this setup, my temperatures are around 50–55°C at idle and generally 65–80°C while gaming. In heavy games, the GPU can reach my 85°C thermal throttle limit. The case has plenty of ventilation, so it works with a positive-pressure setup.

I'm using the modded P3.00 BIOS with the CPU unlock toggle. My current fan curve is T1: 60°C / 45%, T2: 70°C / 55%, T3: 80°C / 60%, T4: 85°C / 75%, with the critical temperature set to 90°C. I'm also using the ACPI fix, which helps reduce CPU temperatures at idle.

One important thing to know before printing: the heatsink mod is required for this case. You'll need to trim the heatsink fins, I cut mine using the small flush cutters that came with my 3D printer, and the whole process took me less than an hour.

6.5L:

• Four 120mm 25mm or 15mm thickness fans. 

5.4L:

• Two 120mm 25mm or 15mm thickness fans.

I recommend using 15mm fans, for easy assembly for both versions, especially for the 6.4L version board backplate side.

Requirements:

• Bed Size 180²mm or Larger.

• Flex PSU ~180mm length or Shorter.

• 16mm Power Latching Switch.

• 12x M5x10mm Fan Screw.

• 11x M3x6mm Screw.

• 4x M3x4x5mm Threaded Inset.

• 4x M3 Nut.

Assembly Guide:

These pictures are for the 6.5L version, the 5.4L is similar.

1. All required parts for assembly.

1. Heat the M3×4×5mm threaded inserts into the four mounting points on the Middle Frame.

1. Fit the 16mm power switch into the opening on the Front Frame.

2. Align the two sections and slide them together.

1. Install and tight the two Frames with four M3x6mm Screws and four M3 Nuts.

1. Align the Brackets, and use the screws that came with your fans probably M5×10mm. 

In this picture all the fans are intake, you can experiment with one intake and one exhaust.

1. Sandwich the Board between the Fans Brackets, and connect the 4-Pin Fan Header, and the 8-Pin PCIe Cable to the Board. 

The 5.4L version only has one 2x120mm fans bracket on the heatsink side

1. Slide the Board and the Brackets together slowly and align them with the Front Frame mount holders, everything should fit without force.

Be careful don't cut the cables with heatsink fins or bind them too hard.

1. Use three M3x6mm screws to install the PSU to the I/O.

1. Connect the 8-Pin PCIe cable to PSU and connect the Power Switch to the 24-Pin Motherboard cable.

2. Slide the PSU slowly.

3. Use four M3x6mm screws to tight the I/O to the Middle Frame.