Posted by networked 4 hours ago
It is also a very hacky build. You need to flash the BIOS which enables a few interesting unlocks: from 24 to 40 GPU compute units and 6 to 8 CPU cores. It's a bit of a silicon lottery and will depend on your specific board and you need to test everything thoroughly yourself, honing on a config that works for you.
The software side of things is Linux, so if you're familiar with setting it up it shouldn't be difficult to go through the different steps. There are a few distros that work well. I use Bazzite and boot directly to Steam big picture, the UX is great. You can exit to desktop and you have a fully usable Linux box that you can play around with from the comfort of your sofa.
One of the downsides is that it uses a lot of power when idling, about 80W. I just turn it off after using it. I'm working on a QOL feature: an ESP32-based power switch that starts the board when a specific BT device is detected (usually a controller). Once everything is setup the board works very nicely. It can be a bit loud depending on your fan/case combination. I'm currently printing this one[0]
It delivers about the same punch as a standard PS5. The hardware is remarkably similar, and much better than mini PCs set up with AMD APUs, unless you go Strix halo but that is another price league (10x). You can play Cyberpunk 2077 decently on it on settings similar to an AMD RX 6700XT or slightly below RTX 3070.
A pretty impressive number is the memory bandwidth at ~410 GB/s, which should run local LLMs like Gemma 4 or Qwen3.8 27B at decent speed but with limited context size as its just 16Gb
Would I build it again? It was a lot of fun, but financially is not a crazy deal if you need to buy all the materials and factor your time in. Still much cheaper than a Steam Box!
- [0] https://makerworld.com/en/models/3021754-bc250-case-mkuu-fsp...
Edit: GPU performance comparison
As for the idle dray, a lot of PC's have Wake On Lan so you can power it on via a special IP packet. I could't get it to work on mine, so i pus an esp32 based power monitoring plug in front of it, and configured the PC to power on directly when powered. When the power monitoring sees the PC sleeping for some time, it cuts the power. I control the plug via home assistant, so i can switch it on remotely
I don't have an ethernet cable where the box is, so WoL is not an option for me either. I could have used something similar to your approach (very smart, by the way!) but decided to go ESP aiming for the most console-like experience of just grabbing the controller and playing your game
Yours seems a bit too eager though! I wouldn't want the thing to start up every time I get home as it turns the projector on, which lowers the projector screen, which blocks the (small) apartment's main entrance when lowered and would make me enter home on my fours ¯\_(ツ)_/¯
Thanks
what for? just use DP
I paid ~$186 shipped for the board on eBay 5 weeks ago. I use an ATX power supply and NVMe that I had laying around and I printed a big case for it[0].
I seem to have gotten a good one as it has no problems after unlocking the extra CPU/GPU cores.
I run vanilla Arch on mine configured to boot into Steam. The jank factor is pretty high but it does trade blows with the Steam Machine for a fraction of the price.[1]
I did end up going through with the purchase of a 512GB Steam Machine for $1160 w/tax and swapped in a 2TB NVMe. It is definitely a more polished/living room-ready product and I'm happy with the hardware but it's definitely a questionable value.
It's worth reading over the docs[2] first before committing. There are lots of options for cooling, storage, and power supplies. Just depends on what you want to get out of it and how much time you want to invest in it. There are pre-made images so you don't necessarily need to be a Linux expert but it would help if you want to stay on top of the latest developments. There is still on-going work to get even more performance[3]
- [0] https://www.printables.com/model/1789618-bc-250-atx-case-dua...
- [1] https://www.youtube.com/watch?v=5Sw1SdU9buQ
- [2] https://elektricm.github.io/amd-bc250-docs/
- [3] https://github.com/lonewolf0622/BC250-Native-Mesh-Shaders-
A metal and wood case could be worth $300.
A good design is worth something, and a good printing job is worth something, and the convenience of a service is worth something, but no amount of good design and quality printing job and service convenience can make a 3d printed case worth more than about $50 before shipping, and it would need to be somehow pretty special design to overcome some basic material and process weaknesses and still be functional and look good to be worth that much.