You are choosing between the KAMRUI E3B and the BOSGAME P4 Ultra, both running the same AMD Ryzen 7 7730U chip and 16GB RAM. This page tells you exactly which one fits your specific needs so you skip the wrong ports.
In short: The BOSGAME P4 Ultra is the better choice for most buyers because it includes dual 2.5G Ethernet ports and WiFi 6E, making it superior for home labs and quiet offices. The KAMRUI E3B is the budget pick if you only need standard Gigabit LAN and do not mind slightly louder fan noise.
Quick picks
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Adds extra USB-A ports and Ethernet, expanding the mini PC's connectivity without needing a second dock.
Provides active cooling under the mini PC, preventing thermal throttling when the device sits on a soft surface.
The differences at a glance
Both machines use the same central brain, so raw computing power is nearly identical. The differences live in the ports, the radio, and how they handle heat. We cover gmktec m5 ultra vs bosgame p4 ultra in a guide of its own.
The table below highlights the specs that actually change your daily use. If you only skim one part of this page, make it this one.
| Feature | KAMRUI E3B | BOSGAME P4 Ultra |
|---|---|---|
| Processor | AMD Ryzen 7 7730U | AMD Ryzen 7 7730U |
| RAM | 16GB DDR4 (up to 64GB) | 16GB DDR4 3200MHz (up to 64GB) |
| Storage | 1TB M.2 SSD (up to 4TB) | 1TB NVMe SSD (up to 16TB) |
| Ethernet | 1x Gigabit LAN | 2x 2.5 Gigabit LAN |
| WiFi | WiFi 6 (802.11ax) | WiFi 6E (adds 6GHz) |
| Noise | Loud under load (~40dB) | Quiet under load (~35dB) |
The BOSGAME P4 Ultra wins on connectivity. It offers faster wired internet and a newer wireless standard. The KAMRUI E3B wins on price. You get the same core performance for less money.
Networking: When dual 2.5G ports matter
The biggest hardware gap is the Ethernet ports. The KAMRUI E3B has one standard Gigabit port. The BOSGAME P4 Ultra has two ports that handle 2.5 Gigabit speeds.
If you are just browsing the web or streaming 4K video, the Gigabit port on the E3B is plenty fast. You will never notice the difference on a standard home internet plan.
However, if you are building a home server, running a firewall, or transferring large files to a NAS, the P4 Ultra changes the game. You can link two internet lines or move data much faster between machines.
- Standard users: The KAMRUI E3B is sufficient.
- Home labbers: The BOSGAME P4 Ultra is the clear winner.
- Video editors: The P4 Ultra speeds up transfers to local storage.
If your mini PC will sit on a desk and drive two monitors, a docking station can free up the precious USB ports. It lets you plug in keyboards, mice, and network cables without crowding the back of the device. For the detail, see our notes on the differences between the two models.
Pro tip: To use the dual 2.5G ports for link aggregation, check that your router or switch also supports 2.5GbE.
Expands your port selection, letting you keep your USB-C and USB-A slots free for other tasks.
- The Anker Advantage: Join the 50 million+ powered by our leading technology.
- Massive Expansion: Equipped with a USB C PD-IN charging port, 2 USB-A data ports, 2
WiFi and wireless performance
The BOSGAME P4 Ultra supports WiFi 6E. This standard uses the 6GHz frequency band, which is less crowded than the 2.4GHz or 5GHz bands.
In a dense apartment building, that extra bandwidth keeps your connection stable. The KAMRUI E3B uses standard WiFi 6. It is still very fast, but it lacks the newer 6GHz option.
If you rely on wireless for video calls or large downloads, the P4 Ultra offers better future-proofing. It will likely handle congestion better as more neighbors get 6GHz routers.
If you plug in an Ethernet cable every day, this difference matters less. Wired connections are always more stable than wireless, regardless of the WiFi generation.
Noise and cooling performance
A mini PC often lives on a desk or under a desk where you can hear it. The KAMRUI E3B has a standard fan setup that gets louder when the system works hard. Before you buy anything, it is worth looking at kamrui ak1plus mini.
Under full load, you may hear the E3B fan spin up. This is normal but can be distracting in a quiet home office. The BOSGAME P4 Ultra uses a more advanced thermal design.
It runs cooler and quieter. Even when you are rendering video or running a stress test, the P4 Ultra stays much quieter. For many, this quieter operation is the main reason to pay the extra cost.
If you plan to keep the computer in a bedroom or a shared space, the P4 Ultra is the safer choice. It will not wake anyone up at night.
Adds airflow under the mini PC, helping it stay cool and quiet even when placed on a desk or shelf.
- 120mm Quiet Adjustable Cooling Fan: Built with a high-quality 120mm adjustable-speed
- Flexible USB-C 5V Power Input: Designed with USB-C 5V input and includes a USB-A to
Storage and expansion limits
Both units ship with 1TB of storage. The difference is how much you can add later. The KAMRUI E3B has one extra slot, capping your total at 4TB.
The BOSGAME P4 Ultra has two M.2 slots. This allows you to install much larger drives, up to 16TB total. This is plenty for even the heaviest media collections.
If you store thousands of photos or large 4K video files, the P4 Ultra gives you more room to grow. You do not have to worry about running out of space in five years. The other half of this decision is deciding between these high-end minis.
For most office users, the 4TB limit on the E3B is more than enough. You likely will never fill up that much storage. Only heavy data users need to worry about this limit.
Which should you buy?
- For the budget buyer: Buy the KAMRUI E3B. It has the same processor and core speed. You save money on the premium networking ports you might not use.
- For the home server or lab user: Buy the BOSGAME P4 Ultra. The dual 2.5G Ethernet ports are essential for advanced networking and fast data transfers.
- For the quiet office worker: Buy the BOSGAME P4 Ultra. It runs significantly quieter under load, which is better for video calls and focused work.
- For the wireless power user: Buy the BOSGAME P4 Ultra. WiFi 6E provides a more robust connection in crowded areas with many neighbors.
- For the space-saver: Buy the BOSGAME P4 Ultra. It often includes a VESA mount, allowing you to hide it behind a monitor and free up desk space.
The next step is to check the current stock of the model you prefer. Both are easy to set up and will serve you well for years. The P4 Ultra is the stronger all-rounder for most users.
The bottom line
The BOSGAME P4 Ultra is the better mini PC for most people, offering dual 2.5G Ethernet, WiFi 6E, and quieter cooling. The KAMRUI E3B is the value pick if you only need standard connectivity and can tolerate a bit more fan noise.
- 120mm Quiet Adjustable Cooling Fan: Built with a high-quality 120mm adjustable-speed
- Flexible USB-C 5V Power Input: Designed with USB-C 5V input and includes a USB-A to
Frequently asked questions
Is the KAMRUI E3B fast enough for gaming?
Yes, it is great for light titles. The integrated graphics can run esports games like League of Legends or CS:Go at 1080p. It is not meant for heavy AAA games at high settings.
Can I upgrade the RAM on both models?
Yes, both support up to 64GB of DDR4 RAM. This allows you to run virtual machines or many browser tabs without slowing down the system later on.
Do these mini PCs come with a remote control?
Usually, no. They are standard desktop OS machines. You will need a keyboard and mouse for setup. Some users add a remote later to turn it into a media center.
Which one is better for a Plex server?
The BOSGAME P4 Ultra is better. The dual 2.5G Ethernet ports allow it to handle high bitrate streams and large library transfers much faster than the single Gigabit port on the E3B.