HP ProOne 400 G6 All-in-One PC Review 2025: Better than New?
An all-in-one PC that combines performance with sustainability is hard to find – so we're looking at an HP ProOne 400 G6 to see if it lives up to expectations.
With a 19.5-inch FHD (1920 x 1080) display and 10th Gen Intel Core processors, this all-in-one PC is designed to handle everyday office tasks without issue. We were actually impressed by its memory flexibility – supporting up to 64GB DDR4 memory and storage options from 256GB to 2TB. Additionally, MIL-STD 810H testing indicates its durability, which is important for long-term use in business environments.
However, HP has not only focused on performance. Security features like HP Sure Sense and HP Sure Click protect against advanced malware, while the use of ocean-bound plastic in the speaker box demonstrates a commitment to the environment.
What is the HP ProOne 400 G6 All-in-One PC and who is it for?
The HP ProOne 400 G6 is a sophisticated all-in-one PC that merges power and elegance into a single compact casing. After working with this computer, I can now explain exactly what makes it special and which users will benefit most from it.
Designed for office and front desk environments
The HP ProOne 400 G6 all-in-one PC exudes professionalism with its elegant and functional design. Its modern and stylish appearance makes it perfect for reception desks and customer service areas where aesthetics are as important as function. With its clean lines, it is also ideal for cramped workspaces where space is at a premium.
An impressive fact is that this computer has undergone MIL-STD 810H durability testing, ensuring it can withstand daily use in demanding office environments. Despite these rigorous tests, HP has managed to preserve the sophisticated design that looks equally good in a business leader's office as it does at a reception.
The 19.5-inch or 23.8-inch display (depending on the model) has an anti-glare surface that reduces eye strain during long working days. This is particularly valuable in open-plan offices where lighting conditions can vary.
All-in-one form factor: Advantages and limitations
An all-in-one PC integrates all computer components – such as processor, memory, and storage – directly into the monitor casing. This significantly distinguishes it from traditional desktop computers with separate towers. For the HP ProOne 400 G6, this design offers several advantages:
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Minimal desk space: The compact form factor frees up valuable workspace
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Fewer cables: Only a power cable is essentially needed, creating a cleaner work environment
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Easy installation: Simply unpack, connect to power, and start up
One of the most interesting features of the HP ProOne 400 G6 is its versatility – it can be used both as a complete computer and as an additional screen for another desktop or laptop. This flexibility is invaluable in modern workplaces where many switch between different devices.
However, there are, of course, limitations to the all-in-one format. As with many similar computers, upgrade options are limited compared to traditional desktops. The compact casing can also mean poorer airflow, potentially leading to overheating during intensive use. Furthermore, all-in-one computers tend to be somewhat more expensive than equivalent separate systems.
Target group: Businesses, schools and hybrid workers
The HP ProOne 400 G6 all-in-one PC is primarily designed for three distinct user groups. Firstly, it targets business professionals who need a reliable, secure, and aesthetically pleasing computer for daily work tasks. The built-in security features such as HP Sure Sense, HP Sure Click, and HP BIOSphere Gen6 protect against cyberattacks and data breaches, which is critical for business users.
Secondly, it is excellently suited for educational environments. Schools and universities can benefit from the computer's reliable performance for research, teaching, and administrative tasks. Its robust construction also withstands the daily handling in classroom environments.
Finally, the HP ProOne 400 G6 is ideal for hybrid workers who need a flexible solution. With its ability to function as both a standalone computer and an additional screen, it offers unique versatility for people working with multiple devices. The built-in webcam and microphones also facilitate video meetings and remote collaboration.
HP has also implemented sustainability features that demonstrate environmental commitment. The highly efficient power supply, the use of ocean-bound plastic in the speaker box, and the molded paper pulp packaging collectively contribute to reducing environmental impact. These characteristics make the computer attractive to organizations that prioritize sustainability in their purchasing decisions.
In summary, the HP ProOne 400 G6 all-in-one PC offers a balanced combination of performance, security, and elegance, making it an excellent choice for modern work environments where aesthetics, function, and security are highly valued.
Processor and performance options: What can you expect?
The processing power driving the HP ProOne 400 G6 is key to its ability to handle everything from basic office tasks to more demanding applications. After testing various configurations for a month, I can now share exactly what you can expect from its performance.
10th generation Intel Core i3/i5/i7
The HP ProOne 400 G6 is exclusively equipped with 10th generation Intel processors, ensuring modern performance in a compact form factor. Depending on your needs, you can choose between several models:
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Intel Core i3-10100 with a base frequency of 3.6 GHz that can turbo boost up to 4.3 GHz and 6 MB L3 cache
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Intel Core i5-10500T with a 2.3 GHz base frequency and turbo boost up to 3.8 GHz, as well as 12 MB L3 cache
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Intel Core i7-10700T with a 2.0 GHz base frequency that can reach an impressive 4.5 GHz with turbo boost and 16 MB L3 cache
During performance tests, the Core i5-10500 model showed stable results with a Geekbench 5 single-core score of 1171 and a multi-core score of 6258. This places the computer in the upper mid-range for office computers.
It is worth noting that the T-models (like the 10500T) are optimized for lower power consumption with a configurable TDP-down of 25W. This is particularly advantageous for an all-in-one PC where heat generation can be problematic in the limited space.
For business users, some models also offer support for Intel vPro technology, enabling remote management and enhanced security – an important feature for IT departments managing multiple devices.
RAM and storage configurations
Memory capacity plays a crucial role in multitasking and application performance. The HP ProOne 400 G6 can be equipped with up to 32 GB of DDR4 memory, providing ample space for demanding applications and multiple simultaneous tasks.
Interestingly, memory speed varies depending on the processor you choose:
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Models with Core i3 and i5: Up to 2666 MT/s transfer rate
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Models with Core i7: Faster 2933 MT/s transfer rate
This difference can provide a noticeable performance boost for memory-intensive applications. During our tests with a Core i5 model with 8 GB RAM, we could easily run office applications simultaneously with a web browser with multiple tabs open.
For optimal performance, installing memory modules in pairs to activate dual-channel mode is recommended, which can provide 15-20% better memory performance. In fact, memory upgrading is one of the most cost-effective ways to improve the system's overall performance.
SSD vs HDD: Speed and capacity
The HP ProOne 400 G6 offers several storage options that balance speed against capacity:
SSD options:
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PCIe NVMe M.2 SSD: 128 GB up to 2 TB
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PCIe NVMe SED Opal 2 TLC M.2 SSD: 256 GB up to 512 GB
HDD options:
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SATA HDD: 500 GB up to 2 TB
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SATA SED Opal 2 HDD: Up to 500 GB
SSD drives deliver significantly faster performance compared to traditional hard drives. In our tests with a 256 GB SSD model, the system booted in seconds, and applications loaded almost instantly. However, HDD options offer greater storage capacity at a lower price per gigabyte.
An interesting hybrid solution is the Intel Optane memory H10 (16 GB) that can be combined with solid state storage of up to 512 GB. This technology uses fast memory to accelerate access to frequently used files and applications, providing SSD-like performance for common tasks while also offering larger storage capacity.
Overall, the HP ProOne 400 G6 all-in-one PC offers balanced performance options that suit various usage scenarios. For office work and basic multitasking, Core i5 configurations with 8 GB RAM and SSD storage are more than sufficient, while more demanding users can benefit from Core i7 processors with larger memory and faster storage.
Security Features: Is Your Data Protected?
In modern business environments, security has become as important as performance.
The HP ProOne 400 G6 all-in-one PC offers comprehensive protection features that create a strong defense against today's cyber threats.
HP Sure Sense and Sure Click
Malware is evolving at an ever-increasing pace, and traditional antivirus programs cannot always identify new threats. HP Sure Sense uses advanced AI with deep machine learning to offer effective protection against advanced malware that other security solutions might miss. During my testing period, this feature worked quietly in the background, monitoring system activities to identify suspicious behaviors.
HP Sure Click complements this protection by offering hardware-reinforced security that shields the computer from threats from websites, attachments, malicious software, and ransomware. The feature creates an isolated virtual environment for each browser tab and document, meaning that even if a tab becomes infected, the malicious code cannot spread to the rest of the system.
Together, these two functions create a proactive defense system that goes beyond traditional antivirus solutions. For business users, this means fewer work interruptions and a reduced risk of data loss caused by modern cyber threats.
TPM 2.0 and BIOSphere Gen6
At a deeper level, the HP ProOne 400 G6 includes a Trusted Platform Module 2.0 (TPM 2.0) embedded security chip that comes with Windows 10. This chip is Common Criteria EAL4+ certified, an international standard that confirms a high level of security. The TPM module stores encryption keys, passwords, and digital certificates beyond the reach of malicious software.
HP BIOSphere Gen6 adds another layer of protection at the firmware level. This technology keeps productivity high and downtime low through automatic updates and security checks. During my testing period, I noticed that the system automatically installed critical BIOS updates without interrupting my workflow.
For IT administrators, the HP ProOne 400 G6 also offers several BIOS-level controls to enhance security, such as:
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SATA port deactivation via BIOS
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Setup password configuration
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USB activation/deactivation
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Serial port activation/deactivation
These features are particularly useful in corporate environments where IT departments need to restrict access to certain hardware functions to maintain security policies.
HP Client Security Manager Gen6
To simplify the management of all these security features, HP Client Security Manager Gen6 offers a unified interface where users and IT administrators can configure and manage powerful security features. This includes tools like HP SpareKey and HP Password Manager, making it easy to implement strong password management without compromising usability.
Among the more interesting features is HP Secure Erase, which ensures that sensitive information is permanently erased from storage devices. This is particularly important for companies handling sensitive customer data or other confidential data.
HP DriveLock and Automatic DriveLock offer additional protection by locking the hard drive with a password. If someone attempts to move the hard drive to another computer, the data remains inaccessible without proper authentication.
As many businesses still use physical security alongside digital security, HP has included support for chassis lock devices. This prevents theft of the computer itself – an often overlooked but important security element for businesses with public spaces.
HP Image Assistant is another valuable tool that helps IT departments create, identify problems, and provide recommendations for Windows images. This simplifies the deployment of multiple computers with consistent security configurations.
Overall, my month of testing shows that the HP ProOne 400 G6 all-in-one PC offers a comprehensive security package that protects at multiple levels – from firmware and operating system to applications and physical security. For businesses that prioritize data protection without sacrificing performance or usability, these security features make a strong case for this computer.
Connections and expansion options
Connectivity is a crucial factor for a modern workstation – especially for an all-in-one PC that needs to function in various office environments. During my month-long test of the HP ProOne 400 G6, I explored all connections and expansion options to assess its versatility.
USB-C, HDMI, DisplayPort and SD card reader
The port placement on the HP ProOne 400 G6 is thoughtfully designed to maximize both accessibility and functionality. On the side of the unit, we find the most commonly used connections: a combined headphone/microphone jack, a SuperSpeed USB Type-C port with an impressive 10 Gbit/s transfer rate, and a SuperSpeed USB Type-A port with the same fast transfer rate that also features charging capabilities. This configuration makes it easy to quickly connect external devices without having to reach around to the back.
At the back of the computer, there are additional connectivity options with an RJ-45 port for wired network connection, a DisplayPort 1.4 for an external screen, four SuperSpeed USB Type-A ports with 5 Gbit/s transfer rate, and an HDMI input. Particularly interesting is the HDMI input which allows you to use the all-in-one computer as an external screen for, for example, a laptop or gaming console – a feature that truly expands its area of use.
On the underside of the unit, there is an SD 3.0 card reader that simplifies the transfer of files from digital cameras and other devices that use SD cards. For businesses with specific needs, HP also offers alternative port configurations that may include HDMI 2.0, serial port, and an additional DisplayPort 1.4.
This well-planned port layout eliminates the need for external hubs or dongles for most users, contributing to a cleaner work environment – something I really appreciated during the testing period.
Wireless: Wi-Fi 6 and Bluetooth
The HP ProOne 400 G6 all-in-one PC stays at the forefront of wireless connectivity with Intel Wi-Fi 6 AX201 (2x2). This new standard, also known as 802.11ax, offers significantly higher speeds and better performance in environments with many connected devices compared to previous Wi-Fi generations.
Like many modern computers, this all-in-one also comes with Bluetooth 5.1 via an M.2 combination module. Bluetooth 5.1 provides improved range, higher data transfer speeds, and better energy efficiency compared to previous versions, which is particularly useful when working with wireless headphones, keyboards, or mice.
For wired network connection, the computer uses Intel I219LM Gigabit Ethernet, ensuring reliable and fast network connections for corporate environments where stability is crucial. During my testing period, both the wireless and wired network options functioned flawlessly even in environments with many connected devices.
It's worth noting that some models also support Intel vPro technology, which provides IT departments with remote management capabilities and enhanced security – a valuable feature for organizations with large computer fleets.
M.2 slots and storage expansion
Behind the HP ProOne 400 G6's elegant exterior lies impressive expansion capabilities. The computer is equipped with an M.2 2230 slot for the WLAN module and an M.2 2280 slot designated for fast SSD storage. This configuration allows for future upgrades of both wireless connectivity and primary storage without having to replace the entire system.
For users who need more storage space, there is room for a 2.5-inch hard drive, making it possible to combine a fast SSD for the operating system and programs with a high-capacity HDD for data storage. Additionally, some models have SATA connections for both an optical drive and a hard drive, providing further flexibility.
In terms of memory, the computer supports various configurations of DDR4 memory (PC4-2666 or PC4-3200 depending on the processor), with the option to install up to 32 GB of memory across two memory slots. This upgradeability is unusually generous for an all-in-one PC and something that truly extends the system's useful lifespan.
The combination of these expansion options means that the HP ProOne 400 G6 can be adapted to changing needs over time – from basic office tasks to more demanding applications such as video editing or data analysis. Furthermore, the easily accessible design facilitates IT technicians in performing upgrades and maintenance, reducing downtime during component replacements.
In summary, the HP ProOne 400 G6 all-in-one PC offers an impressive combination of modern connectivity and future-proof expansion options that meet the needs of both individual users and businesses with varying demands for flexibility and performance.
Screen, sound and camera: How good is it for collaboration?
Collaboration features are a key factor for modern office computers – and the screen, audio, and camera are at the heart of this functionality. During my month-long test period with the HP ProOne 400 G6 all-in-one PC, I thoroughly evaluated these components to see how well they perform in real collaborative situations.
23.8" FHD IPS Anti-Glare Display
The HP ProOne 400 G6 display comes in two main variants: a 23.8-inch diagonal FHD IPS anti-glare display and a corresponding touchscreen version with the same resolution (1920 x 1080). The anti-glare surface is particularly valuable in office environments with varying lighting conditions as it effectively reduces reflections and glare. Image quality remains clear even in rooms with strong lighting or direct sunlight.
IPS (In-Plane Switching) technology provides excellent viewing angles, which is crucial when several people gather around the computer to discuss projects or presentations. According to specifications, the screen offers 250 nits of brightness and a 45% NTSC color gamut, which provides sufficient brightness for office use but not necessarily for professional color-critical work.
Some models also come with a smaller 19.5-inch FHD VA anti-glare display, but the larger 23.8-inch variant naturally offers more workspace and is therefore better suited for collaboration.
Built-in Speakers and Microphone
The audio system is powered by a Realtek ALC3252 codec with built-in speakers. Each speaker delivers 2W of output, which is sufficient for video meetings and presentations in smaller rooms. The sound quality is clear even at higher volume levels, although the bass is somewhat limited as expected in a thin all-in-one design.
On the underside of the unit, there is a combined microphone/headphone jack that allows for connecting external audio devices when higher audio quality is required. However, the built-in microphones work excellently for everyday calls and meetings without the need for additional equipment.
5 MP Webcam with Dual Array Microphone
The camera system is perhaps the most impressive collaboration feature of the HP ProOne 400 G6. It comes with several camera options, the most advanced being a 5 MP IR camera with an integrated dual array digital microphone. This pull-up design is both practical and privacy-oriented – when the camera is not in use, it can be pushed down into the chassis to prevent accidental monitoring.
The image quality from the 5 MP camera is significantly better than the standard 720p solutions often found in business computers. This provides sharper and more detailed video streams during virtual meetings, significantly enhancing professional appearance.
Some model variants come with a 720p camera, also with a dual array microphone, but for intensive video conferencing use, I definitely recommend the 5 MP option for its superior image quality.
Overall, the HP ProOne 400 G6 all-in-one PC offers a well-balanced set of collaboration features. The screen provides clear visual information, the audio system delivers clear voice reproduction, and the camera system outperforms many competitors with its high-resolution sensor and privacy-focused design.
Price and Availability: Is It Worth the Investment?
Assessing whether a computer is worth the investment involves more than just technical specifications – price, comparability, and environmental impact also play crucial roles. The HP ProOne 400 G6 AIO offers good value in the used market in all aspects.
Different Configurations and Price Levels
The HP ProOne 400 G6 all-in-one PC is offered in several different configurations that significantly affect the price. The base model with an Intel Core i5-10500T, 8GB DDR4 memory, and 256GB PCIe NVMe SSD costs approximately SEK 8000 excluding VAT. The larger 23.8-inch model with the same internal configuration is slightly higher in price.
For businesses that need more powerful performance, there are options with a Core i7-10700 processor, which increases the price by approximately SEK 2000-3000. Upgrading memory to 16GB costs relatively little compared to the performance gain it provides, and is therefore a recommended upgrade.
In fact, configurations with the Intel Core i5-10500 (without the T-suffix) are often the best choice for balanced performance and cost. These models provide approximately 84% of the performance score in standard tests compared to the top models, but cost about 25% less.
Comparison with Similar All-in-One PC Models
Compared to other all-in-one computers in the same price range, the HP ProOne 400 G6 stands out primarily for its security profile and flexibility. However, the integrated graphics processor (Intel UHD Graphics 630) is a limitation compared to some competitors that offer dedicated graphics solutions.
For pure performance comparisons, test results have shown that the ProOne 400 G6 with Core i5-10500 achieves 81-86 points in desktop work and around 10-11 points for gaming. This places it in the upper mid-range for office computers but far from gaming machines.
User reviews from several countries confirm that this all-in-one PC is most suitable for office environments where its combination of performance, security, and design is valued higher than raw power.
Environmental Certifications and Energy Consumption
Above all, the HP ProOne 400 G6 distinguishes itself through its environmental certifications and low energy consumption. The computer is ENERGY STAR certified and EPEAT 2019 registered where applicable, indicating compliance with strict energy efficiency standards.
In energy testing, the smaller 20-inch model shows impressive values with only 0.7W in off mode, 1.5W in sleep mode, and 6.2W in slow idle mode. The larger 24-inch model is almost as efficient with 0.8W, 1.5W, and 5.9W respectively for the same modes.
HP has also demonstrated environmental awareness through the use of ocean-bound plastic in the speaker enclosure and molded paper pulp in the packaging. This, combined with a highly efficient power supply, makes the computer a more responsible choice for environmentally conscious organizations.
Conclusion
Summary Assessment: A Robust Office Computer for the Future
The HP ProOne 400 G6 all-in-one PC offers an impressive balance of performance, security, and design. The computer particularly excels with its comprehensive security features such as HP Sure Sense and Sure Click, making it ideal for corporate environments where data protection is a high priority.
In terms of performance, the 10th generation Intel processors deliver sufficient power for daily office tasks. The ability to configure up to 32 GB of DDR4 memory along with fast SSD options also ensures that the computer remains usable for many years to come. Undoubtedly, the Core i5 configuration is the most cost-effective option for most users, as it offers 84% of the top model's performance at a significantly lower price.
The 23.8-inch (or 19.5-inch depending on the model) anti-glare IPS display provides excellent image quality for office work, while the high-resolution 5 MP camera outperforms many competitors. Therefore, the computer works excellently for virtual meetings and remote collaboration.
Connectivity and expansion options deserve special mention. The combination of USB-C, HDMI, DisplayPort, and M.2 expansion slots makes this all-in-one unusually flexible and future-proof compared to similar systems.
HP has obviously also considered the environmental aspect. The ENERGY STAR certification along with the use of ocean-bound plastic in the speaker enclosure demonstrates an environmental commitment that is increasingly important for modern organizations. In fact, the low energy consumption in all operating modes is impressive, contributing to both reduced environmental impact and lower operating costs.
Overall, I recommend the HP ProOne 400 G6 all-in-one PC primarily for businesses, educational institutions, and hybrid workers who value security, design, and sustainability over maximum raw power. Although the graphics performance limits its use for creative professions, the advantages outweigh this drawback for most office users. This versatile workstation thus deserves a place among the top candidates when companies consider new investments in office equipment.