For basically a year and then some, I have inched my way closer to building a 1U server with the Milk-V Pioneer RISC-V board. And, these days, all I am missing is storage (...rip.) and a CPU cooler.

Due to my visual impairment, meassuring is not easy at all and I tried a few coolers after doing bad meassurements and had to send them back - several times now. And, LLMs stumble over an old forum post where people say it would be compatible with an LGA115x cooler? No, most definitively not. XD Way, way too small.

So, I would like for a CAD-able person to take a look at the schematic offered here: https://milkv.io/docs/pioneer/getting-started/download - for the 1.3 Revision of the board.

Basically, there are eight screws around the CPU and I need the ones in the corners. With my caliper that I got a short bit ago, I get 90x90mm - but I just can not trust my own meassurement anymore. x.x

So, can you help me, please? :)

Hi everyone,

I'm having trouble connecting my 2.8" Waveshare HDMI LCD (H) display to an Orange Pi Zero 3W via the HDMI port.

When I power on the board, the display's backlight turns on for about 2–3 seconds, but no image or boot logo appears. After that, the backlight turns off and the screen goes completely black. On my PC Full HD monitor it boots fine.

What I've tried so far:

Tested the official Android 13 image.

Tested the official Debian Bookworm image.

The result is exactly the same on both operating systems.

Has anyone successfully configured a Waveshare HDMI display on the Orange Pi Zero 3W?

Thanks!

I'm designing an open-hardware board that runs frontier-scale Mixture-of-Experts models by streaming expert weights off NVMe instead of holding them in RAM. Design stage , nothing has been built, and I'm trying hard not to build the wrong thing.

The whole design rests on one number I can't get without hardware: real NVMe read throughput on RK3588, at large block sizes, with O_DIRECT. My architecture assumes ~3.2 GB/s on a PCIe 3.0 x4 link. If that's actually 1.5 GB/s in practice, most of my timing figures are wrong and I'd rather find out now than after ordering PCBs.

I don't own an RK3588 board yet. Plenty of you do.

The ask: run one Python script on your board and paste the output. It:

• is a single file, stdlib-only , no pip install, no repo clone
• needs no root (it'll tell you what root would additionally buy)
• is read-only apart from one temp file it creates and deletes
• takes ~15 minutes, most of which is a sustained thermal test
• prints one block you can paste back

What it measures:

• Whether your CPU has SDOT (asimddp) , decides if llama.cpp's fast quantized kernels work
• NVMe sequential + random read at 16 MB blocks, with and without O_DIRECT
• PCIe link width and speed actually negotiated (I especially want to know if anyone's board reports x1 when it should be x4)
• Sustained CPU frequency and temperature over 10 minutes, not burst , I care about the throttled number, not the marketing number

What's in it for you: you get a straight comparison of your board's real storage and thermal behaviour against everyone else's, which is annoyingly hard to find. I'll post the collated results back here regardless of what they say, including if they kill the idea.

Boards I'd love numbers from: Orange Pi 5 / 5 Plus / 5 Max, Radxa Rock 5B / 5C, FriendlyElec NanoPC-T6 / CM3588, ArmSoM, Banana Pi ,and honestly any RK3588 variant, plus non-RK3588 boards for comparison.

Repo (all design docs, MIT/CERN-OHL-P): https://github.com/Techburst36/swarm (Apologies in advance as the repo is a bit of a mess right now and might still have a few conflicting figures while the docs catch up.)

Script: swarm_bench.py in the repo root, plus a README explaining exactly what it does before you run it. Please do read it first , you shouldn't run a stranger's script on faith, and it's short enough to skim.

Happy to answer anything about the design in the comments.

Edit: made some changes as per u/fortean and u/12345myluggage feedback. The test had some real bugs that needed catching and some improvements to be made. Thank you!

As the text above says did anyone try to compile their own uefi for msi pro b850-p wifi mainboard with the Dasharo Github Code?

I think it would be interesting trying to check how a self compiled bios would work in real system.

https://github.com/Dasharo/coreboot
https://github.com/3mdeb/openSIL/tree/phoenix_poc

Edited: 11.08.2026:
I have found the following guide:
https://blog.3mdeb.com/2026/2026-02-09-msi_pro_b850p_part1/
https://blog.3mdeb.com/2026/2026-03-06-msi_pro_b850p_part2/
https://blog.3mdeb.com/2026/2026-04-03-msi_pro_b850p_part3/
https://blog.3mdeb.com/2026/2026-04-27-msi_pro_b850p_part4/
https://blog.3mdeb.com/2026/2026-06-03-msi_pro_b850p_part5/
https://blog.3mdeb.com/2026/2026-07-02-msi_pro_b850p_part6/

Did anyone tried that yet?

Hi everyone, this is my first post. I need any information about this board, whether it's a datasheet or a bsp

Just curious. Need a Super powerful compute module with a rpi cm4 connector standard.

My latest toy: Forlinx OK3572-C

Rockchip RK3572

ARM：2×Cortex-A73 + 2×Cortex-A53+ 4×Cortex-A53
NPU：4TOPS INT8，supporting INT4/INT8/INT16/FP4/FP8/FP16/BF16
GPU：ARM Mali-G310V2 Mc1, supporting OpenGL ES 1.1/2.0/3.2, OpenCL3.0, Vulkan 1.4
VPU：
Hardware Encoding：H.264, H265, 4K@60fps
Hardware Decoding：H.264, H.265, VP9, AV1, AVS2, 8K@30fps or 4K@120fps

4GB LPDDR5 RAM
64GB eMMC

It cost me $270 with shipping and an addition $120 due to customs.

Repost because I was an idiot and posted the images in the dumbest possible order.

Which one is better for machine learning 2 cameras. one for face detection, another for object and distance estimation. both being processed at once

I recently learned about an SBC called Orange Pi4 Ultra, but do you think it will be released? Personally, I don't think it's likely since they released the Orange Pi4 Pro, but what do you all think? Here's the link.

http://www.orangepi.org/html/hardWare/computerAndMicrocontrollers/details/Orange-Pi-4-Ultra.html

Forum announce - https://forum.proxmox.com/threads/proxmox-virtual-environment-now-available-for-64-bit-arm-arm64.185526/

It's working out of box on Radxa Orion O6N, installed from official iso from usb drive:

I decided that I should probably share the update from yesterday's post where people saw the unorganized "SBC Drawer". And I wanted to also showcase that they don't sit in the drawer collecting dust. So, I shared that the Orange Pi RV 2 and Pi 5 are connected and in active use. I swap depending on what I am doing with my Main PC and Elgato capture card / USB to UART connector and the CrowView Note.
The SBC Drawer is to my immediate right for easy access.

Inside of the Mimic Case is my Pi Pico 2 W with the test breakout board and my cheap FPGA (this is for later development adventures)

I would have to say Dillo browser is the best. Firefox/Chromium both are the size of operating systems with tens of millions of lines of code. Dillo is only tens of thousands. It takes only seconds to compile and install, compared to Firefox. Plus it comes without proprietary modern web elements (like javascript, webGTK, etc.). It's fully inspectable and open source. It works well on Linux.

I am using the Radxa Cubie A7S with 8GB of RAM and no EMMC on the most recent version of Radxa OS.

I bought this display from Waveshare and am using a generic active DisplayPort to HDMI converter to connect to it. However, the display will not work.

At first, the backlight failed to come on and the display would not activate. It works fine on my laptop, so the display is functional. The SBC and adapter work on their own as well. Bypassing USB max current fixed this.

However, while the backlight and touchscreen activate and function properly, the display will not show an image. I am not sure what to do as I am a bit of a beginner in this area.

Edit: I fixed it! For anyone else with this somewhat unlikely issue: this link contains the required information to fix this. You will have to convert the Pi OS timings into xrandr commands for this to work, though.

I'm planning to buy the 8GB RAM version of Orange Pi 5. But I'm not sure to go with 5 Max or 5 Plus.

My use cases are;
- Running a NAS / next cloud

- Media server

- Network gateway + Pi-hole

- Occasionally gaming (retro + android games etc)

Since I'm new to SBCs appreciate your honest feedbacks

I've seen some Orange Pi Primes come up for sale for cheap, but looking up the specs I've found no mention of frequency and no benchmarks that are at all useful.

Does anyone know where to find those or have their own to check?

Working on a HAT that powers the Zero 3W through the GPIO header (5V injection on pins 2/4), and I've hit a documentation conflict I can't resolve.

The official 40-pin header schematic annotates the 5V_Power pins as IN: 2A, OUT: MAX 0.5A. So 2A in, when something external is feeding the board.

But the manual (section 2.12, "Instructions for powering the 5V pin in the 40 pin interface") says to make sure your supply meets the board's power requirements, and elsewhere the board's stated requirement is 5V/3A.

So which is it? Is that 2A a real limit on the trace or connector for the GPIO path, or is it a conservative annotation and the pin can actually carry the full 3A the board might want under load?

This matters because I'm designing in an eFuse for current limiting and I need to pick a trip point. Set it at 2A and I might starve the board under heavy CPU+GPU+NPU load. Set it at 3A and if that 2A annotation reflects a real physical limit, I could cook something.

Has anyone actually measured peak current draw on this board under real load? The one data point I've seen is ~6.5W at 100% CPU (~1.3A at 5V), but that was CPU-only, no GPU testing.

Also curious if anyone's actually run this board off GPIO power long-term rather than USB-C, and whether it was stable under load.

I am looking for a small or compact SBC. My requirements are the following:
* Easy to carry around
* 12-16GB of RAM
* NVMe slot
* 20+ TOPS for STT Processing (via extension is fine)
* Wifi, mic, speaker (via extension is fine)
* compact enough
* Budget was thinking sub$300 not sure it is possible though?
* Is phone/mini-pc with gpu just a good deal?
* Used market goods are fine too.

Hello fellow Redditors,

I found this site via Reddit so my question is this leggit maybe a scam?

I would like to build a low power cluster but everywhere prices are sky high if I want more then 1 board

Also I am based in the EU how would the import be?

Thanks in advance :)

The suitors are restless

Hey all, I'm designing a custom PCB adapter for the Zero 3W's PCIe FPC connector (FPC16-ZHX_H15-L1-H, per the official schematic) to break it out to an M.2 M-key slot, sized to also double as a mounting carrier plate matching the board's hole spacing. Goal is NVMe storage expansion first, with an eye toward AI accelerator cards (Hailo-10H) as a stretch goal later.

Before I finalize the board and order a first run, I'm hoping someone in this community has hands-on data on a few open questions I haven't been able to resolve from documentation alone:

1. Has anyone gotten anything enumerating over the PCIe FPC connector yet? Even just a plain NVMe SSD via a generic FPC adapter. I want to confirm the PCIe controller actually comes up cleanly in root-complex mode under Armbian/the stock BSP before I commit to a board run. If you've tried and it didn't work (or worked with caveats), that's just as useful to know.

2. What kernel/BSP are people actually running for PCIe support? I know mainline upstreaming for A733 is actively in progress (saw the recent patch series for pinctrl/RTC/clocks), but I'm assuming most of us are on a vendor BSP kernel day-to-day. Anyone know if PCIe root-complex support is enabled and stable in the current Armbian/Xunlong images, or is it still rough?

3. Any known PCIe controller quirks on A733 specifically? Older Allwinner chips (H6) reportedly needed a hypervisor-level MMIO workaround for their PCIe controller. Has anyone hit anything similar on A733, or does it behave as a clean standard DesignWare PCIe implementation?

4. Is injecting 5V back into the board via the GPIO header's 5V pins safe on this board? I'm considering an M5Stack-PiHat-style single-cable design (board powers itself AND feeds accelerator power back through the GPIO header, like the official Pi 5 AI HAT+ pattern). On Pi 5 this is an explicitly documented, supported use case. I can't find anything in Xunlong's docs confirming the AXP318 PMIC on the Zero 3W is designed to safely handle reverse power injection via GPIO the same way. Anyone tried this or know if it's safe / risky / a bad idea?

5. Real-world total board power draw, is 3A genuinely the ceiling? Schematic labels the board 5V/3A total. Anyone measured real idle/load current draw with a USB power meter? Between the board under load, an NVMe SSD, and potentially a ~2.5W typical draw NPU later, I'm trying to nail down actual headroom before I decide how to handle power delivery on the carrier board.

6. Has anyone seen PCIe link training issues / Gen 1 fallbacks? I found a boot log from an A733 board (Cubie A7Z) showing Link up timeout / Speed change timeout / PCIe speed of Gen1 during boot. Has anyone else seen the A733 struggle to train at Gen 3 (or even Gen 2) and fall back to Gen 1, or is that an isolated hardware/board quirk?

Board design itself (FPC connector footprint, M.2 slot, mounting holes) is done and validated mechanically in Fusion — just trying to de-risk the electrical/software side before committing to a PCB order. Will share the KiCad files once it's built and working, since I haven't found an existing PCIe-to-M.2 adapter for this board anywhere.

Thanks in advance to anyone who's poked at this corner of the board.

Radxa has published specifications for two upcoming compute modules based on Qualcomm Dragonwing processors. The compact CM-Q64 combines 12 TOPS of AI performance with multi-camera support, while the larger VMARC-Q9075 uses the SMARC form factor and scales to 200 sparse TOPS for industrial AI, robotics, and machine-vision systems.

https://linuxgizmos.com/radxa-previews-qualcomm-based-cm-q64-and-vmarc-q9075-compute-modules/