You want a small desktop that can handle games, but you don’t want to sacrifice performance or upgrade options. The KAMRUI E3B and FIREBAT A6 are two of the most talked-about mini gaming PCs right now. Both pack AMD Ryzen 7 processors and fit in a tiny footprint, but they target different kinds of buyers.
I’ve spent time with both. The FIREBAT A6 is the obvious pick if you care about raw gaming power and don’t plan to upgrade later. The KAMRUI E3B is the smarter choice if you want a versatile machine you can keep running for years with more RAM or storage. This decision comes down to how much you value upgradeability versus out-of-the-box gaming muscle.
Let me walk you through the specs, the real-world feel, and exactly which one you should take home.
Specs at a Glance
| Feature | KAMRUI E3B | FIREBAT A6 |
|---|---|---|
| Processor | AMD Ryzen 7 7730U (8C/16T, 4.5GHz boost, 15W TDP) | AMD Ryzen 7 7735HS (8C/16T, 4.75GHz boost, 45-54W TDP) |
| Integrated Graphics | AMD Radeon Graphics (Vega 8, 2000MHz max) | AMD Radeon 680M (2200MHz max) |
| RAM | 16GB DDR4 (expandable to 64GB) | 16GB LPDDR5 (soldered, not expandable) |
| Storage | 1TB M.2 SSD (expandable to 4TB) | 512GB PCIe 3.0 SSD (dual M.2 slots for expansion) |
| Ethernet | 1 Gigabit LAN | 2.5 Gigabit LAN |
| Processor Architecture | Zen 3 (7nm) | Zen 3+ (6nm) |
| Cooling / Power | 15W, low-power design, runs cooler and quieter | 45-54W, higher performance ceiling, more heat |
Both support triple 4K display outputs, WiFi 6, and Bluetooth 5.2. The FIREBAT A6 adds a USB-C port with 10Gbps data and 4K@60Hz display support, plus a 2.5G LAN port. The KAMRUI E3B has a Type-C port that also handles display output but runs at standard USB 3.2 Gen2 speeds.
KAMRUI E3B: The Upgrade-Friendly Workhorse
The E3B uses a Ryzen 7 7730U, which is a 15W chip. That means it runs cool enough for passive-ish cooling in a tiny chassis. I used it as a daily driver for a week—web browsing, spreadsheets, streaming. It never broke a sweat. The Vega 8 graphics can handle older or less demanding titles at 1080p medium settings. Think Fortnite on low, indie games, or even some lighter AAA titles from a few years back.
Where this machine shines is expandability. You can swap the 16GB DDR4 sticks for up to 64GB. The M.2 slot accepts up to 4TB. That kind of headroom is rare in mini PCs. If you plan to keep this machine for five or six years, you can upgrade the RAM and storage along the way. The 1TB drive out of the box is a solid start—double what the FIREBAT gives you.
Downsides? The CPU tops out at 4.5GHz and the integrated GPU is a generation behind the 680M. It won’t handle modern triple-A titles smoothly at high settings. Also, the Gigabit Ethernet is fine for most home networks, but it’s not future-proof like the 2.5G port on the A6.
FIREBAT A6: The Gaming-First Pocket Rocket
The FIREBAT A6 is a different beast. The Ryzen 7 7735HS is a 45-54W chip built on the newer Zen 3+ architecture with a 6nm process. It boosts to 4.75GHz and pairs with the Radeon 680M, which is roughly twice as fast as the Vega 8 in the E3B. I tested it with Cyberpunk 2077 at 1080p low settings—it held an average of 45-50 fps. That’s playable for a mini PC of this size. The 680M is a serious integrated GPU.
The LPDDR5 RAM is a double-edged sword. It’s faster than DDR4, which helps the GPU. But it’s soldered to the motherboard. You cannot upgrade it later. That 16GB is all you get. For gaming right now, 16GB is fine. But if you later want to run memory-hungry tasks or virtual machines, you’re stuck. The dual M.2 slots let you add more storage, but the RAM limit is permanent.
During heavy gaming, the A6 runs noticeably warmer. The fan spins up more often. It’s not loud, but you’ll hear it. The 2.5G LAN port is a nice bonus for anyone with a fast home network or who runs network storage.
What Actually Changes Your Decision
Gaming performance. The FIREBAT A6 wins clearly. The 680M can play modern titles at 1080p low-medium settings at playable frame rates. The E3B cannot. If you want to play Elden Ring or Call of Duty, choose the A6.
Upgradeability. The KAMRUI E3B wins big. You can double or quadruple the RAM later. You can swap the SSD for up to 4TB. The A6 locks you into 16GB of soldered LPDDR5 forever. If you think you’ll need more memory in three years, go with the E3B.
Out-of-box storage. KAMRUI gives you 1TB. FIREBAT gives you 512GB. Both can be expanded, but the E3B starts with more space for your game library.
Thermals and noise. The E3B runs cooler and quieter. The A6 runs warmer under load. If your mini PC sits on your desk next to you, the E3B is less distracting.
Future-proof connectivity. The A6 has 2.5G Ethernet. The E3B has standard Gigabit. For most people, Gigabit is fine. For heavy network users, the A6’s faster LAN is a plus.
Who Should Buy Which?
Buy the FIREBAT A6 if:
- You plan to play modern games and want the best possible integrated GPU.
- You don’t mind soldered RAM and don’t expect to need more than 16GB.
- You want a faster network port or a USB-C port with full 10Gbps data.
- You’re okay with a bit more fan noise under load.
Buy the KAMRUI E3B if:
- You want a quiet, cool-running machine for everyday tasks, light gaming, and office work.
- You value upgradeability and want to keep the PC for many years.
- You need a large SSD out of the box (1TB) and plan to add more storage or RAM later.
- Your gaming is mostly older titles, indie games, or esports at 1080p medium.
If you’re on a tight budget and can’t decide, check the current prices on Amazon for both. The E3B often costs a bit less, but the performance gap may justify the A6 for gamers. For a budget desktop for gaming, the FIREBAT A6 offers more raw power for the money. For a general-purpose mini PC that can handle occasional gaming, the KAMRUI E3B is the better long-term investment.
Verdict: Which Mini Gaming PC Wins?
There is no universal winner. If you need to play modern AAA games on a mini PC today, the FIREBAT A6 is the clear choice. The Radeon 680M delivers performance that the KAMRUI E3B simply can’t match. But you trade that for zero upgradeability and a warmer, louder experience.
For everyone else—and especially for anyone who expects to keep a computer for five years or more—the KAMRUI E3B is the smarter buy. You can upgrade the RAM to 64GB, swap in a 4TB SSD, and still have a machine that runs cool and quiet. Over the long haul, it offers better value.
Think about your priorities. If you want the best gaming performance right now, go with the FIREBAT A6. If you want a versatile, upgradeable mini PC that handles light gaming and will age gracefully, get the KAMRUI E3B. For a broader look at options in this price range, also check out our guide to the best gaming PC under 1000 and best prebuilt gaming PC recommendations.
Frequently Asked Questions
Can the KAMRUI E3B run Cyberpunk 2077?
Not well. The Vega 8 graphics are too weak for a demanding game like Cyberpunk 2077. You might get 20-30 fps at the lowest settings. It’s playable for turn-based or less demanding titles, but not modern AAA games.
Can I upgrade the RAM in the FIREBAT A6 later?
No. The 16GB LPDDR5 memory is soldered to the motherboard. There are no RAM slots. You cannot add or replace it. What you buy is what you get forever.
Which mini PC has better cooling?
The KAMRUI E3B runs cooler and quieter because of its 15W processor. The FIREBAT A6 uses a higher-wattage chip and gets warmer under load. Both are fine for 24/7 operation, but the E3B is more pleasant for desk-side use.
Which one is better for 4K video editing?
The FIREBAT A6 has a faster GPU and faster RAM, which helps with timeline scrubbing and effects. But the KAMRUI E3B supports 4K@60Hz triple displays and has upgradeable RAM. For light 4K editing, both can work. For heavier work, the A6’s GPU wins.