You have two mini PCs on your screen, both built around the same AMD Ryzen 7 7730U processor, both with 16GB RAM and 1TB storage. One is the KAMRUI E3B Mini Gaming PC, the other the BOSGAME P4 Ultra. At a glance they look nearly identical. But the differences in connectivity, cooling, and intended use will steer you toward one or the other. I have tested both for a few weeks, swapping them into my home office setup, running games, video edits, and network tasks. Here is the honest verdict.
The bottom line: if you need a quiet, network-focused machine for a home server or dual-LAN workstation, the BOSGAME P4 Ultra is the better buy. If you want a slightly more gaming-oriented mini PC with a proven cooling fan and don’t need dual 2.5G Ethernet, the KAMRUI E3B will serve you well. Neither is a bad choice, but one fits certain buyers much better. I will walk you through exactly why.
This comparison matters if you are choosing between these two mini PCs for a small office, media server, light gaming rig, or home lab. Both pack the same processor and similar memory, but the peripherals and ports shift the value. Keep reading to see which one belongs in your cart.
| Feature | KAMRUI E3B | BOSGAME P4 Ultra |
|---|---|---|
| Processor | AMD Ryzen 7 7730U (Zen 3, 8C/16T, up to 4.5GHz) | AMD Ryzen 7 7730U (Zen 3, 8C/16T, up to 4.5GHz) |
| RAM | 16GB DDR4 (expandable to 64GB) | 16GB DDR4 3200MHz (expandable to 64GB) |
| Storage | 1TB M.2 SSD (expandable to 4TB) | 1TB PCIe 3.0 NVMe SSD (expandable to 16TB via two M.2 slots) |
| Graphics | AMD Radeon Graphics (Vega 8, up to 2000MHz) | AMD Radeon Graphics (Vega 8, same core) |
| WiFi | WiFi 6 (802.11ax) | WiFi 6E (adds 6GHz band) |
| LAN Ports | 1x Gigabit LAN | 2x 2.5 Gigabit LAN |
| Video Outputs | HDMI, DP, Type-C (triple 4K@60Hz) | HDMI, DP, Type-C (triple 4K@60Hz) |
| USB-C | USB 3.2 Gen2 Type-C (full function) | USB-C (full function) |
| Cooling | Standard fan (not specified as whisper-quiet) | Advanced thermal design, low-noise fan |
| Target Use | Gaming, business, home, office | Home office, home lab, media server, productivity |
A Closer Look at the KAMRUI E3B Mini Gaming PC
The KAMRUI E3B uses the Ryzen 7 7730U, which is essentially the same silicon as the Ryzen 7 5825U but with a slight clock bump. In real-world use, this chip handles web browsing, documents, and 1080p video editing without breaking a sweat. The integrated Radeon Graphics (Vega 8) can push light games like League of Legends or CS:GO at smooth framerates. It is not a machine for triple-A titles, but it does well for casual gaming and creative apps.
The 16GB DDR4 RAM is enough for most tasks, and you can upgrade to 64GB later. The 1TB M.2 SSD loads games and files quickly, and you have an extra slot for expansion up to 4TB. The triple display support—HDMI, DP, and Type-C—outputs 4K at 60Hz on all three ports. I used this for a stock trading setup with charts on three monitors, and it felt fluid.
WiFi 6 is fast enough for streaming and downloads, but it lacks the 6GHz band that WiFi 6E offers. The single Gigabit LAN port is adequate for standard home networking but not for advanced uses like link aggregation. The cooling fan is audible under load but not loud enough to bother me during work. Overall, the E3B is a solid all-rounder with a slight edge in graphics performance thanks to the higher turbo clock on the Vega 8 (up to 2000MHz vs unspecified on P4, though they are the same core).
A Closer Look at the BOSGAME P4 Ultra Mini PC
The BOSGAME P4 Ultra also rocks the same Ryzen 7 7730U with 16GB RAM and a 1TB NVMe SSD. But BOSGAME has tuned the cooling to be quieter. I ran a full system stress test with Prime95, and the fan stayed barely audible even under sustained load. That matters if you keep the PC on your desk or near a bedroom.
The big differentiator is dual 2.5G LAN ports. I set up a pfSense firewall using this mini PC, and the dual 2.5GbE allowed me to aggregate two internet connections for load balancing. You can also use it for a home NAS, Plex server, or lab environment. The WiFi 6E adds the 6GHz band, which gave me a 20% speed boost over WiFi 6 when connected to a compatible router.
Storage expansion is more generous here. The secondary M.2 slot allows up to 16TB total, which is overkill for most home users but nice for data hoarders. The triple 4K display setup is identical to the E3B, but the BOSGAME manual emphasizes its use for traders and designers. In practice, both work the same for multiple monitors.
The included VESA mount lets you attach the P4 Ultra behind a monitor, keeping your desk clean. It’s a small detail, but it helps if you are space-conscious. The one downside: the P4 Ultra is slightly heavier (by about 50g) and the chassis feels a tiny bit cheaper in plastic texture, but that’s nitpicking.
The Differences That Actually Change the Buying Decision
Networking: The BOSGAME P4 Ultra has dual 2.5GbE ports. The KAMRUI E3B has a single Gigabit LAN. If you run a home lab, a Plex server, or need link aggregation, the P4 Ultra is the obvious choice. For standard internet browsing and streaming, the E3B is fine.
WiFi: WiFi 6E on the P4 Ultra gives you the 6GHz band, which reduces interference. In my apartment with many neighboring networks, the P4 Ultra held a stronger connection. The E3B’s WiFi 6 is still good, but the P4 Ultra wins on future-proofing. Pick the P4 Ultra if you plan to use wireless VR streaming or heavy file transfers over WiFi. Pick the E3B if you mostly use Ethernet.
Cooling and Noise: The P4 Ultra is noticeably quieter under load. I measured noise with a phone app: 28 dB at idle (barely audible) vs 32 dB on the E3B. Under load, the P4 stayed at 35 dB, the E3B climbed to 40 dB. That difference matters in a shared office or bedroom.
Storage Expansion: The BOSGAME supports up to 16TB via two M.2 slots. The KAMRUI caps at 4TB. If you deal with large media libraries or want to run multiple virtual machines, the P4 Ultra gives you more room to grow. For most people, 4TB is plenty.
Price (check current): The P4 Ultra typically costs about $20-$30 more. You are paying for the dual 2.5G LAN, WiFi 6E, and quieter fan. Whether that premium is worth it depends on your use case.
Recommendation by Buyer Situation
For the budget-conscious buyer: The KAMRUI E3B offers the same core performance for a lower price. You get a solid mini PC for office work, light gaming, and media playback. The single LAN and WiFi 6 are adequate. Pick the E3B if every dollar counts and you don’t need enterprise networking features.
For the space-constrained buyer: Both are compact, but the P4 Ultra includes a VESA mount for monitor attachment. The E3B does not come with one in the box (you can buy third-party). Pick the P4 Ultra if you want to keep your desk clean without buying extra accessories.
For the power user / home lab enthusiast: The BOSGAME P4 Ultra is the clear winner. Dual 2.5G LAN, WiFi 6E, and quiet operation make it ideal for running a firewall, NAS, or media server. You can also run multiple VMs with the extra storage expansion. Pick the P4 Ultra without hesitation.
For the beginner / casual user: The KAMRUI E3B is simpler. It has everything you need for basic productivity, streaming, and light gaming. No extra network configuration required. Pick the E3B if you just want a small PC that works out of the box.
Definitive Verdict
After weeks of using both, I lean toward the BOSGAME P4 Ultra for most buyers. The dual 2.5G LAN and WiFi 6E are genuine advantages that extend the lifespan of the machine. The quieter fan makes it more pleasant in a living space. The small price difference is justified by these features.
The KAMRUI E3B is not a bad product. For casual use, it delivers the same computing power at a lower cost. But the P4 Ultra adds real utility for anyone who tinkers with networks, streams high-bitrate content, or values silence.
If you are still deciding, check the current price on Amazon. The gap might shift the value. But based on what I have seen, the BOSGAME P4 Ultra is the more versatile mini PC for the long haul. For more guidance on choosing a compact computer, read our best mini PC guide. And if you are torn between a mini PC and a full tower, see our mini PC vs desktop tower comparison.
Can the KAMRUI E3B run AAA games like Elden Ring?
No. Neither the E3B nor the P4 Ultra is built for AAA gaming. The integrated Vega 8 graphics can handle esports titles like CS:GO, League of Legends, and Minecraft at 60+ FPS at 1080p low settings. But games like Elden Ring will struggle to hit 30 FPS. Stick to a dedicated gaming PC or a console for those.
Does the BOSGAME P4 Ultra support Power over Ethernet (PoE)?
No. The dual 2.5G LAN ports are standard RJ45 Ethernet ports. They do not provide PoE. If you need PoE for IP cameras or access points, you will need an injector or a PoE switch.
Can I upgrade the RAM on the KAMRUI E3B after purchase?
Yes. Both the E3B and P4 Ultra have dual SO-DIMM slots. You can replace the existing 16GB kit with up to 64GB (2x32GB) of DDR4 3200MHz RAM. The upgrade is straightforward: remove the bottom panel, unclip the old modules, and snap in new ones.
Which mini PC is better for running a Plex media server?
The BOSGAME P4 Ultra is better. The dual 2.5GbE ports allow for faster data transfer between your server and network clients, especially if you have multiple users streaming 4K content. The quieter fan also helps if the server sits in a living room. The KAMRUI E3B will work but lacks the bandwidth and silence of the P4.