BMAX B9 Power Mini PC with Intel Core i9 Review: The Most Powerful Mini PC for €500?

BMAX B9 Power mini PC with black chassis, white BMAX logo, vents, USB ports, and blue accents 

The BMAX B9 Power arrives with a bold promise: to fit a 14-core Intel Core i9, the same type of chip found in high-end gaming laptops, into a case that fits in the palm of your hand. The result is a mini PC with extraordinary CPU power for its size and price, capable of handling demanding multitasking, editing, virtualization, and professional work with ease. However, there's an important "but" you should know before buying it: the integrated Intel Iris Xe GPU is its weak point, and the system suffers from a certain imbalance between CPU and graphics that limits its usefulness for modern gaming.

✅ Pros:

• Exceptionally powerful i9-12900H CPU for mini PC: 14 cores, up to 5.0 GHz

• Excellent cooling — the quietest and most efficient seen in this category

• Simultaneous triple display support (HDMI 2.1 + DP + USB-C)

• High-speed LPDDR5 memory in the 24 GB version

• Windows 11 Pro activated included

• Very compact and lightweight chassis (427 g)

❌ Cons:

• Intel Iris Xe: Weak GPU for current gaming

• 12th generation processor (2021-2022) — not the most modern on the market

• No eGPU support via USB4/OCuLink

🏁 In short: This mini PC is for demanding workers and professionals, not for gamers. If you need pure CPU power in the smallest possible space, it's a solid option. If you want to game, look to AMD.

🔗 Learn more about the BMAX B9 Power

📋 Technical Specifications Table

🎨 Design and Construction Quality

BMAX B9 Power Mini PC showcasing ports and connectivity on black chassis 

The BMAX B9 Power comes in a glossy black plastic chassis that attracts fingerprints like a magnet—the most frequent complaint among those who review it in depth. The Transformers-inspired logo may or may not appeal to you, but the build quality itself is solid for its price range. It weighs a mere 427 grams, making it one of the lightest mini PCs on the market with an i9 processor inside.

The ventilation grilles are strategically placed along the sides and rear, and it's clear that airflow has been carefully considered: the dual heat pipe cooling system  keeps the laptop below 85°C even under sustained load. The design is functional and understated—it lacks RGB lighting like the KAMRUI AM21—but it gains in discretion, making it perfect for office environments. It includes a VESA mount for attaching it behind the monitor, freeing up valuable desk space.

🖥️ Screen and Multimedia

Like all mini desktop PCs, the B9 Power does not include its own screen. Its real value in this area lies in its video output capabilities: it supports up to three simultaneous monitors thanks to a combination of HDMI 2.1 (capable of transmitting 4K@120Hz with dynamic HDR and VRR), a DisplayPort, and a full-featured USB-C port with video output.

For everyday multimedia use—4K streaming, YouTube, Netflix, multi-screen video conferencing—the device performs flawlessly. The Intel Iris Xe with 96 EUs perfectly handles hardware decoding of H.264, H.265, and AV1 video. Audio is handled via HDMI/DisplayPort to external monitors or through the 3.5 mm jack for headphones and speakers.

🚀 Performance and Software

CPU: A beast in mini PC shoes

Intel Core i9 12th Gen processor box and chip 

The Intel Core i9-12900H is the heart of this machine and, contrary to what its size might suggest, it's a truly high-performance processor. With its hybrid architecture of 6 performance cores (P-Cores) and 8 efficiency cores (E-Cores), it intelligently manages multitasking: the E-Cores handle background tasks while the P-Cores are reserved for demanding applications. The practical result is exceptionally smooth performance: Chrome with 40 tabs open, Photoshop open, a Teams video call, and a code compilation running simultaneously—no lag, no waiting.

The processor is a 12th generation Alder Lake, manufactured using Intel's 7 process (an improved 10nm). While it's not the most modern chip on the market in 2026, it remains more than sufficient for the vast majority of professional and productivity use cases.

The Bottleneck: Intel Iris Xe

Let's be completely honest here: the Intel Iris Xe G7 with 96 EUs is a clearly inferior integrated GPU to the Radeon 780M found in AMD rivals. In comparative 3D benchmarks, the Iris Xe in the B9 Power comes in virtually alone in last place—far behind the Radeon 680M, 780M, or the Intel Arc integrated into the Ultra 9 chips.

This has a direct consequence: for modern gaming, the options are very limited. Games from 8-10 years ago work perfectly, but current AAA titles are simply not viable at a playable quality.

Software and Operating System

The device comes with Windows 11 Pro pre-installed and activated —an important detail compared to options that only include the Home version. The level of bloatware is low. The Intel drivers are correctly installed. One important observation reported by several analysts: the BIOS limits the processor's power consumption to compensate for the 65W power supply, meaning that the i9-12900H doesn't always operate at full performance unless a 100W USB-C charger is connected.

🔋 Energy Consumption and Cables

This is one of the most interesting, and controversial, aspects of the BMAX B9 Power. The Intel Core i9-12900H has a PL2 (peak power) of 115W and a base TDP of 45W. The included adapter is only 65W, which means the BIOS has to reduce performance to avoid overloading the power supply.

In tests conducted by independent reviewers, it was found that connecting a 100W USB-C charger in parallel frees the system from this limitation and noticeably improves performance—although the 100W charger itself gets considerably hot under prolonged use. For normal office use, the 65W adapter is sufficient. For sustained maximum workloads (compilation, rendering, intensive virtualization), an external 100W USB-C charger makes a significant difference.

At idle, power consumption is an efficient 8-15W. Under average office load, it hovers around 35-45W — very reasonable for an i9.

🔌 Connectivity and Extras

BMAX B9 Power Mini PC rear view with Ethernet, USB, HDMI, DisplayPort ports 

The BMAX B9 Power offers comprehensive connectivity for a device of its size, although not as generous as some competitors:

Available ports:

• 🖥️ HDMI 2.1 (4K@120Hz, dynamic HDR, VRR)

• 🖥️ DisplayPort 1.4

• 🔵 USB-C full-featured (data + video + PD charging)

• 🔵 USB 3.2 Gen1 Type-A x1

• 🟠 USB 2.0 Type-A x2

• 🌐 RJ45 Gigabit LAN (1 Gbps)

• 🎧 3.5 mm combo audio/microphone jack

• 🔄 Physical CMOS reset button

Wireless:

• 📶 WiFi 6 (802.11ax) — Realtek RTL8852BE​

• 🔵 Bluetooth 5.2

Internal expansion:

• 2 M.2 SSD slots — allows you to add a second drive without replacing the first one.

• RAM upgradeable up to 64 GB (2 accessible slots)

💬 Reviews on Well-Known Pages

🟢 NotebookCheck — Detailed Review with Benchmarks

NotebookCheck, one of the world's most rigorous hardware media outlets, conducted a full review of the BMAX B9 Power.

Their verdict was balanced: "The Bmax B9 Power impresses with solid performance thanks to the Intel Core i9-12900HK, good connectivity and the ability to manage up to three screens simultaneously. "

However, they were clear in pointing out that the GPU cannot compete with the most modern solutions and that the price of ~€480-540 puts it in a difficult position against better-equipped alternatives.

🟡 OrderChina / RendeljKinait — Test with Real Benchmarks

This in-depth technical analysis was especially valuable because the reviewer tested the equipment to its real limits.

Their most revealing findings: the 65W power supply is the biggest bottleneck in the system — under maximum GPU load, the application crashed because the power supply could not adequately power both components.

Connecting a 100W USB-C charger resolved the issue, confirming that the included power supply is insufficient for the hardware's actual potential.

They highlighted the cooling system positively: "the best and quietest we've seen in a mini PC".

Their actual benchmark results:

• CineBench 2024 Multi: 387 points

• Unigine Heaven 1080p: 24.4 FPS average

• CrystalDiskMark read: 3,189 MB/s

• AIDA 64 sustained temperature: 78°C under 60- minute

🟡 HobbyConsolas — Featured for Price and Power

HobbyConsolas highlighted it as a "power beast" that fits in your hand, emphasizing the combination of an i9 processor, 24 GB of RAM, and a 1 TB SSD as a very attractive proposition for professional use. Their tone was enthusiastic, although they didn't delve into the limitations of the GPU or the power adapter.

🔴 Reddit r/MiniPCs — Reliability Warning

The Reddit community r/MiniPCs has divided opinions.

In December 2025, a user reported a motherboard/power supply failure that the brand refused to replace, also resulting in a loss of shipping costs.

Other users value the power-price ratio positively, but there is a consensus that BMAX's after-sales support is not at the level of brands like GEEKOM or Minisforum.

The general recommendation in the community: buy with an extended warranty.

🟢 BMAX Official — Italian Blogger

On its own corporate blog, BMAX published a review from an Italian blogger who particularly highlighted the 24GB LPDDR5 memory of the base version, describing its capacity and type as "exceptional" for a mini PC.

Logically, this review is favorable and does not mention the feeding problems.

🔬 Detailed Technical Tests

CPU benchmarks

💡 The i9-12900H's Cinebench R23 performs well against the Ryzen 7 8745HS in older tests, but in modern tests (Cinebench 2024) AMD's Zen 4 clearly wins thanks to its newer architecture.

GPU Benchmarks (3DMark) — Contextual Comparison

Gaming Benchmarks (1080p)

Source: NotebookCheck benchmarks​

Thermal Tests

Under prolonged 100% load for 60 minutes with AIDA64, the processor reached a maximum of 78°C — an excellent result that demonstrates the effectiveness of the dual heat pipe cooling system.

The fan remained virtually inaudible during the test (below 35 dB), which is one of the points most positively valued by all reviewers.

No thermal throttling was recorded at any time, suggesting that the performance limitations originate from the power supply, not heat.

🏆 Final Conclusion

Who is it ideal for?

The BMAX B9 Power with i9-12900H is the right choice for:

• 👨‍💼 Professionals and freelancers with heavy workloads (software development, basic CAD, compilation)

• 🖥️ Productivity multi-monitor setups up to triple 4K screens

• 🎓 University students who need maximum processing power in a small space

• 🏠 Home office with video calls, multitasking and editing of large documents

• 🖥️ Lightweight home server where the CPU matters more than the GPU

• 💻 Users coming from laptops who want the same power in a compact desktop computer

⚠️ NOT ideal for:

• 🎮 Gamers who want to play modern AAA games — the Iris Xe doesn't cut it

• 🎨 3D designers or intensive video creators — it lacks GPU

• 💰 Buyers who value robust after-sales support — BMAX doesn't stand out here

🔄 Alternatives to Consider

🛒 Where to buy it?

BMAX B9 Power Mini PC rear ports: USB-C, USB 3.0, power button 

🛒 BMAX B9 Power Amazon — Buyer Protection, easy returns. 

🔗 View BMAX B9 Power on AliExpress → — Most competitive price for international shipping. Look for sellers with an official BMAX store and high ratings.

💡 Key tip: If you buy it, also consider a separate 100W USB-C charger (~€15-20 extra). The included 65W adapter limits the i9's actual performance under maximum loads—with 100W the system delivers everything it promises.