ASRock’s BC-250 mining board has become an odd but tempting project platform for DIY gaming builds. Since late 2025, used boards have been showing up for well under $150, giving hobbyists a way to build a Linux-based living-room PC around a PS5-derived SoC and 16GB of GDDR6 memory.
Now the board has another reason to draw attention: a third-party register patch can reportedly enable up to 40 compute units, compared with the 24 CUs available on the BC-250 in stock form. That gives the mining blade more active CUs than a base PlayStation 5, at least on paper, and early game testing shows meaningful gains.
What the 40 CU Mod Changes
The BC-250 was not sold as a normal consumer graphics card or console board. It is a mining product built around B-grade PS5-family silicon, which is why only 24 CUs are active out of the box. The new community patch changes that by writing to hardware registers during GPU driver initialization through a kernel module parameter.
That does not mean every board has 40 healthy CUs waiting to be used. The disabled units may have been turned off because they were defective, unstable, or unsuitable for the original product target. For buyers, that distinction matters: this is not a guaranteed free upgrade, but an experimental tweak that depends heavily on the individual chip.
The modification also raises power and thermal demands. Reports around the patch describe higher consumption, with a 125W target at 1,500 MHz. The GitHub post is said to recommend conservative voltage and clock settings, including 1,500 MHz at 900 mV, but that specific tuning advice has not been independently verified here and should be treated as experimental rather than universal guidance.
Noctua NF-A12x25 PWM Case Fan
A quality 120mm PWM fan can help a compact BC-250 build move heat away from the board when experimenting with higher GPU clocks. Check your case or frame mounting points before buying.
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Gaming Performance: Stock 24 CUs vs. 40 CUs
ETA Prime’s testing showed gains of up to 28% with the additional CUs active. The games were tested at 1080p high settings with the GPU running at 2 GHz, which is a useful performance snapshot but not necessarily a sensible daily-driver configuration for every BC-250 build.
| Game | Stock 24 CU Result | 40 CU Result | Reported Gain |
|---|---|---|---|
| Cyberpunk 2077 | 36 FPS | 42 FPS | 17% |
| Hitman 3 | 58 FPS | 69 FPS | 19% |
| GTA 5 | 58 FPS | 72 FPS | 24% |
| Spider-Man 2 | 36 FPS | 46 FPS | 28% |
Those numbers are strong enough to make the BC-250 more interesting as a budget gaming board. A jump from the mid-30s to the low-40s in heavier games can be the difference between a compromised experience and one that feels playable with some settings work. In lighter or older games, the extra headroom may matter even more.
The catch is cooling. Running the GPU at 2 GHz is already common among BC-250 experimenters, but reports indicate that this can overwhelm the board’s cooling once all 40 CUs are active. Anyone building around this hardware should plan around airflow, power delivery, and a willingness to back off clocks if the board becomes unstable.
Buyer Verdict: Interesting, Not Plug-and-Play
For the right buyer, the BC-250 is becoming one of the more unusual cheap gaming platforms available. It combines a console-derived SoC, 16GB of onboard GDDR6, and enough Linux support for distributions such as Bazzite to make a compact Steam-style machine possible.
It is best suited to hobbyists who are comfortable with used mining hardware, Linux tinkering, kernel-level changes, and thermal testing. It is a poor fit for anyone who wants a predictable console replacement or a guaranteed performance level.
- Buy it for experimentation, low-cost tinkering, and compact Linux gaming builds.
- Avoid it if you need warranty coverage, quiet thermals, or guaranteed 40 CU stability.
- Assume 32 or 38 CU modes may be more realistic than 40 CUs on some boards.
ARCTIC MX-6 Thermal Paste
Used mining boards may benefit from a careful cooler service before sustained gaming loads. A modern thermal compound is a low-cost part of that checklist.
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The 40 CU patch makes the ASRock BC-250 more compelling, but it also sharpens the risk. If your board has healthy dormant CUs and enough cooling, the performance gain can be substantial. If it does not, the stock 24 CU configuration may still be the practical ceiling.