8b41038be7
- Salvage analysis of K501U components - Orange Pi 5 SBC selection rationale - Storage architecture (SD card + USB) - USB hub expansion plan - Parts list and cost estimates
137 lines
No EOL
3.4 KiB
Markdown
137 lines
No EOL
3.4 KiB
Markdown
# SBC Selection: Orange Pi 5
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**Decision:** Orange Pi 5 (base model, non-Plus) 16GB RAM
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---
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## Options Considered
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| Board | RAM | Price | NVMe | WiFi | Notes |
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|-------|-----|-------|------|------|-------|
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|**Orange Pi 5 16GB**| 16GB | $70-100 | PCIe 2.0 M.2 | No | **Selected** |
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| Orange Pi 5 Plus 16GB | 16GB | $130-150 | PCIe 3.0 M.2 | E-key slot | Better specs, higher cost |
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| Raspberry Pi 5 8GB | 8GB | $80 | HAT required | No | Familiar ecosystem, less RAM |
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| Rock 5B 16GB | 16GB | $140 | PCIe 3.0 M.2 | No | Higher cost |
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---
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## Orange Pi 5 Specifications
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### Model Variants
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| Model | NVMe Slot | WiFi Slot | NVMe Speed |
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|-------|-----------|-----------|------------|
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| Orange Pi 5 (base) | M.2 M-key (PCIe 2.0) | None | ~300 MB/s |
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| Orange Pi5 Plus | M.2 M-key (PCIe 3.0) + E-key | E-key for WiFi | ~2000 MB/s |
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### RK3588S SoC
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| Attribute | Value |
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|-----------|-------|
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| CPU | 8-core (4× Cortex-A76 + 4× Cortex-A55) |
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| GPU | Mali-G610 MC4 |
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| NPU | 6 TOPS AI accelerator |
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| Process |8nm |
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### Memory
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| Attribute | Value |
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|-----------|-------|
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| Configurations | 4/8/16/32GB |
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| Type | LPDDR4/LPDDR4X |
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| Selected | 16GB |
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### Storage Support
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| Interface | Speed |
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|-----------|-------|
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| MicroSD | Up to 512GB |
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| M.2 NVMe (base) | PCIe 2.0 x1 (~300 MB/s) |
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| M.2 NVMe (Plus) | PCIe 3.0 x2 (~2000 MB/s) |
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| USB 3.0 | 5 Gbps |
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### Connectivity (Base Model)
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| Port | Count | Speed |
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|------|-------|-------|
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| USB 3.0 | 1 | 5 Gbps |
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| USB 2.0 | 2 | 480 Mbps |
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| USB-C | 1 | Power + DisplayPort |
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| Ethernet | 1 | 1 Gbps |
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| HDMI | 1 | 4K60 |
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| MIPI DSI | 1 | Display |
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| MIPI CSI | 2 | Camera |
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| GPIO | 26-pin | I2C, SPI, UART, PWM |
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### Power
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| Attribute | Value |
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|-----------|-------|
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| Input| USB-C PD or barrel jack |
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| Voltage | 12V (barrel), 5V (USB-C) |
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| Current | 2A recommended |
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| Typical draw |5-8W under load |
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---
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## Rationale
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### Why Orange Pi 5 (Base)
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1. **Cost:** $70-100 vs $130-150 for Plus
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2. **RAM:** 16GB excellent for desktop Linux, dev work
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3. **Performance:** RK3588S significantly faster than Pi 5
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4. **Availability:** Widely available on eBay with bid flexibility
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### Why Not Orange Pi 5 Plus
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- NVMe speed improvement (2000 MB/s) not critical for cyberdeck use
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- WiFi card slot (E-key) not needed - USB dongle acceptable
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- Price difference ($30-50) better spent on storage and peripherals
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### Speed Reality Check
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| Use Case | Base (PCIe 2.0) | Plus (PCIe 3.0) |
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|----------|-----------------|-----------------|
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| Boot time | ~10s | ~8s |
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| App load | Adequate | Faster |
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| File transfer | ~300 MB/s | ~1500 MB/s |
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| Development| Fine | Fine |
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**For a cyberdeck used as portable workstation, PCIe 2.0 NVMe is adequate.**
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---
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## eBay Bid Strategy
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| Auction | Bid Limit | Shipping | Total Max |
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|---------|-----------|----------|-----------|
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| Orange Pi 5 16GB | $99 | $5 | $104 |
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**Bid late, bid once.** Set max bid and let proxy handle it.
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---
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## Accessories Needed
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### Required
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| Item | Cost |
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|------|------|
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| Power supply (USB-C PD or 12V barrel) | $8-12 |
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| MicroSD card (64GB Endurance) | $10-12 |
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### Recommended
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| Item | Cost |
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|------|------|
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| Heatsink + fan | $5-10 |
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| Case (or custom build) | TBD |
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---
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## Resources
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- [Orange Pi 5 Wiki](http://www.orangepi.org/html/hardWare/computerAndMicrocontrollers/details/Orange-Pi-5.html)
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- [RK3588 datasheet](https://www.rock-chips.com/)
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- [Armbian for Orange Pi 5](https://www.armbian.com/orange-pi-5/) |