HP Pro 400 G9 Mini PC Desktop Computer, Intel CPU, 16GB DDR5 RAM, 256GB PCIe SSD, Triple 4K Display Support, USB-C, Ultra-Quiet Design, Bluetooth 5.2, WiFi 6, Keyboard and Mouse, Windows 11 Pro

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Technical Details

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Summary

Screen Resolution	‎3840 x 2160
Max Screen Resolution	‎3840x2160
Processor	‎2.8 GHz celeron
RAM	‎16 DDR5
Memory Speed	‎4800 MHz
Hard Drive	‎256 SSD
Graphics Coprocessor	‎Shared
Chipset Brand	‎Intel
Card Description	‎Integrated
Graphics Card Ram Size	‎16 GB
Wireless Type	‎802.11ax
Number of USB 2.0 Ports	‎2
Number of USB 3.0 Ports	‎3

Other Technical Details

Brand	‎HP
Series	‎Pro 400
Item model number	‎G9
Hardware Platform	‎PC
Operating System	‎Windows 11 Pro
Item Weight	‎6.19 pounds
Product Dimensions	‎19.5 x 5 x 9 inches
Item Dimensions LxWxH	‎19.5 x 5 x 9 inches
Processor Brand	‎Intel
Number of Processors	‎1
Computer Memory Type	‎DDR5 RAM
Flash Memory Size	‎4 MB
Hard Drive Interface	‎PCIE x 4

Additional Information

ASIN	B0DM3HKZXD
Customer Reviews	65 ratings 4.5 out of 5 stars
Best Sellers Rank	#683 in Computers & Accessories (See Top 100 in Computers & Accessories) #13 in Mini Computers
Date First Available	November 5, 2024

Warranty & Support

Amazon.com Return Policy:You may return any new computer purchased from Amazon.com that is "dead on arrival," arrives in damaged condition, or is still in unopened boxes, for a full refund within 30 days of purchase. Amazon.com reserves the right to test "dead on arrival" returns and impose a customer fee equal to 15 percent of the product sales price if the customer misrepresents the condition of the product. Any returned computer that is damaged through customer misuse, is missing parts, or is in unsellable condition due to customer tampering will result in the customer being charged a higher restocking fee based on the condition of the product. Amazon.com will not accept returns of any desktop or notebook computer more than 30 days after you receive the shipment. New, used, and refurbished products purchased from Marketplace vendors are subject to the returns policy of the individual vendor.

Product Warranty: For warranty information about this product, please click here

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Stay Productive with the Small Form Factor (SFF) or Mini models

The HP Pro series offers two compact desktop solutions tailored for business environments.

Intel Dual-Core Processor	Delivers smooth business performance with integrated UHD Graphics for sharp visuals and reliable multitasking.
High-Speed Memory	Equipped with fast and responsive memory to support smooth multitasking, quick app loading, and consistent day-to-day performance.
Built-in DisplayPort and HDMI	Easily connect to TVs or multiple monitors for an immersive HD viewing experience—perfect for both work and entertainment.
Essential Accessories Included	Comes ready with a full-size wired keyboard and mouse for a complete desktop experience.

Front view of the ProDesk Small Form Factor Computer

SFF Front Ports

1 headphone/microphone combo
1 SuperSpeed USB Type-C 10Gbps signaling rate
3 SuperSpeed USB Type-A 10Gbps signaling rate

View of the back of the ProDesk Small Form Factor Computer

SFF Rear Ports

1 power connector
1 audio-out
1 RJ-45
1 HDMI 1.4
3 SuperSpeed USB Type-A 5Gbps signaling rate
1 DisplayPort 1.4
2 USB Type-A 480Mbps signaling rate

View of the front of the ProDesk Mini computer

Mini Front Ports

1 headphone/microphone combo
1 SuperSpeed USB Type-A 10Gbps signaling rate
1 SuperSpeed USB Type-A 10Gbps signaling rate (charging)
1 SuperSpeed USB Type-C 20Gbps signaling rate

View of the back of the ProDesk Mini computer.

Mini Rear Ports

1 power connector
1 RJ-45
1 SuperSpeed USB Type-A 10Gbps signaling rate
2 SuperSpeed USB Type-A 5Gbps signaling rate
2 DisplayPort 1.4
HDMI 2.1

Enhanced Security with Windows 11 Pro

Protected with always-on security you can trust. This series comes pre-installed with Windows 11 Pro—offering advanced security features, powerful productivity tools, and a streamlined interface. It’s the ideal choice for business professionals and hybrid work environments that demand performance and peace of mind.

This image shows a person using the Small Form Factor computer in a work environment.

Key Differences

Forn Factor: SFF is larger, while the Mini is significantly smaller
Expansion: The SFF offers more expansions options than the Mini.
Memory: The SFF supports higher RAM capacities
Processor: The Mini uses a lower power model

SFF Dimensions:

11.9 x 10.6 x 3.7 in

Mini Dimensions:

6.97 x 6.89 x 1.35 in

HP offers a range of desktop solutions, including Small Form Factor (SFF) and Mini PCs.

SFF models strike a balance between performance and compactness—smaller than traditional towers, yet more expandable than Minis. Mini PCs, on the other hand, offer ultra-compact designs ideal for tight workspaces without compromising essential power.

Both are built for dependable performance, advanced security, and efficient space utilization, making them versatile choices for a variety of professional environments.

	HP Pro 400 G9 Mini PC Desktop Computer, Intel CPU, 16GB DDR5 RAM, 256GB PCIe ...	HP ProDesk 400 G9 SFF Business Desktop Computer, Intel CPU, 32GB RAM, 1TB PCl...	HP ProDesk 400 G9 SFF Business Desktop Computer, Latest 13th Gen Intel Core i...	HP 2025 Pro G9 Mini Desktop Computer, Intel i3-13100T, 16GB DDR5 RAM, 512GB P...	HP ProDesk 400 G9 SFF Business Desktop Computer, Latest 13th Gen Intel Core i...	HP Pro Mini G9 Desktop Computer, 13th Gen Intel Core i5-1335U(Up to 4.6GHz), ...
						Buying Options
Customer Reviews	4.5 out of 5 stars 65	4.4 out of 5 stars 179	5.0 out of 5 stars 3	4.6 out of 5 stars 14	4.8 out of 5 stars 14	3.6 out of 5 stars 10
Price	$399.98	$529.99	$599.99	$499.99	$769.99	— no data
Processor	Intel Celeron G6900T	Intel Celeron G6900	Intel Core i3-13100	Intel i3-13100T	Intel Core i5-13500	Intel Core i5-1335U
CPU Base Speed	2.8 GHz	3.4 GHz	3.4 GHz	2.5 GHz	4.8 GHz	1.3 GHz
OS	Windows 11 Pro	Windows 11 Pro	Windows 11 Pro	Windows 11 Pro	Windows 11 Pro	Windows 11 Pro
Memory Size	16 GB	32 GB	16 GB	16 GB	32 GB	32 GB
Storage Size	256 GB	1 TB	512 GB	512 GB	1 TB	1 TB

Brief content visible, double tap to read full content.

Full content visible, double tap to read brief content.

Videos

Help others learn more about this product by uploading a video!

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Product information

Technical Details

Collapse all

Summary

Screen Resolution	‎3840 x 2160
Max Screen Resolution	‎3840x2160
Processor	‎2.8 GHz celeron
RAM	‎16 DDR5
Memory Speed	‎4800 MHz
Hard Drive	‎256 SSD
Graphics Coprocessor	‎Shared
Chipset Brand	‎Intel
Card Description	‎Integrated
Graphics Card Ram Size	‎16 GB
Wireless Type	‎802.11ax
Number of USB 2.0 Ports	‎2
Number of USB 3.0 Ports	‎3

Other Technical Details

Brand	‎HP
Series	‎Pro 400
Item model number	‎G9
Hardware Platform	‎PC
Operating System	‎Windows 11 Pro
Item Weight	‎6.19 pounds
Product Dimensions	‎19.5 x 5 x 9 inches
Item Dimensions LxWxH	‎19.5 x 5 x 9 inches
Processor Brand	‎Intel
Number of Processors	‎1
Computer Memory Type	‎DDR5 RAM
Flash Memory Size	‎4 MB
Hard Drive Interface	‎PCIE x 4

Additional Information

ASIN	B0DM3HKZXD
Customer Reviews	4.5 out of 5 stars 65 ratings 4.5 out of 5 stars
Best Sellers Rank	#683 in Computers & Accessories (See Top 100 in Computers & Accessories) #13 in Mini Computers
Date First Available	November 5, 2024

Warranty & Support

Amazon.com Return Policy:You may return any new computer purchased from Amazon.com that is 'dead on arrival,' arrives in damaged condition, or is still in unopened boxes, for a full refund within 30 days of purchase. Amazon.com reserves the right to test 'dead on arrival' returns and impose a customer fee equal to 15 percent of the product sales price if the customer misrepresents the condition of the product. Any returned computer that is damaged through customer misuse, is missing parts, or is in unsellable condition due to customer tampering will result in the customer being charged a higher restocking fee based on the condition of the product. Amazon.com will not accept returns of any desktop or notebook computer more than 30 days after you receive the shipment. New, used, and refurbished products purchased from Marketplace vendors are subject to the returns policy of the individual vendor.

Product Warranty: For warranty information about this product, please click here

Feedback

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HP Pro 400 G9 Mini PC Desktop Computer, Intel CPU, 16GB DDR5 RAM, 256GB PCIe SSD, Triple 4K Display Support, USB-C, Ultra-Quiet Design, Bluetooth 5.2, WiFi 6, Keyboard and Mouse, Windows 11 Pro

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Customer reviews

4.5 out of 5 stars

65 global ratings

5 star
79%
4 star
7%
3 star
6%
2 star
4%
1 star
4%

How customer reviews and ratings work

Customers say

Customers find the mini PC excellent in quality and appreciate its small size as a backup computer. They consider it a great value and praise its power and speed. The functionality receives mixed reviews, with some saying it works perfectly while others report issues with the machine going into sleep mode.

Select to learn more

QualityValue for moneyPowerSizeFunctionality

7 customers mention 'Quality'7 positive0 negative

Customers find the quality of the mini PC excellent.

'...I didn't have a clue about it, but it is an awesome computer I love it and it doesn't take up any space at all. Excellent buy.'

'Great PC, fit out needs perfectly. Set up for Window's 11 Pro was easy.'

'Excellent product'

'Excellent. Saves space and fully functional. Only problem is the wired mouse and keyboard. Both should be wireless.'

4 customers mention 'Value for money'4 positive0 negative

Customers find the mini PC to be a great value.

'A great value but returned due to a business adjustment!'

'...I love it and it doesn't take up any space at all. Excellent buy.'

'Great Deal...'

'So far so good. Great value'

3 customers mention 'Power'3 positive0 negative

Customers appreciate the computer's power and speed.

'I can't find anything to complain about. It's quite and runs fast. Meets all needs.'

'...It is a heavy, robust build and has amazing power in a micro footprint for a desktop! There are plenty of ports both front and back....'

'Using it now. Provides the power ans speed that my wife and I need in our retirement.'

3 customers mention 'Size'3 positive0 negative

Customers appreciate the compact size of the mini PC, with one mentioning it provides desktop computing power in a micro footprint.

'It's a nice small unit with a good amount of guts. Just right for my wife.'

'...The small size is great as my backup computer.'

'Desktop computing power in a micro footprint!...'

6 customers mention 'Functionality'4 positive2 negative

Customers have mixed experiences with the computer's functionality, with some saying it works perfectly while others report issues, including one customer mentioning that the machine goes into sleep mode and can only be awakened with a hard shutdown.

'This mini-computer is so much better then all my other computers, works perfectly. Love it !!!'

'It did not function when plugged in, but I got a full refund from Amazon'

'The computer works fine, after I purchased a clover leaf extension cord to use with the power supply....'

'Excellent. Saves space and fully functional. Only problem is the wired mouse and keyboard. Both should be wireless.'

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Amazon Customer

5.0 out of 5 stars

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Top reviews from the United States

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Debra Jackson
5.0 out of 5 stars Love my mini computer
Reviewed in the United States on October 1, 2025
Size: 16GB RAM | 256GB SSDStyle: Intel CPUVerified Purchase

My grandson had me order this Mini PC Desktop computer. I didn't have a clue about it, but it is an awesome computer
I love it and it doesn't take up any space at all. Excellent buy.

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Daniel D. Teoli Jr.
5.0 out of 5 stars Desktop computing power in a micro footprint!
Reviewed in the United States on November 1, 2025
Size: 16GB RAM | 256GB SSDStyle: Intel CPUVerified Purchase
The HP Pro 400 G9 Mini PC Desktop Computer offers silent operation for most tasks. But I don't use it for heavy power operations like video post processing. It is a heavy, robust build and has amazing power in a micro footprint for a desktop! There are plenty of ports both front and back. It comes with built-in speakers, but sound is very tinny. Even so, none of the other desktop computers I've ever bought have any audio speakers built in them. So tinny or not, it is a welcome option. It sets up pretty easy, as far as Windows 11 computers go. Overall, I am very happy with it. I plan to buy more of the HP Pro 400 G9 Mini PC Desktop Computers for light to moderate computing power needs in the future. If things change, I will update this review.

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CJ
5.0 out of 5 stars Works perfectly
Reviewed in the United States on June 2, 2025
Size: 16GB RAM | 512GB SSDStyle: Intel CPUVerified Purchase
I can't find anything to complain about. It's quite and runs fast. Meets all needs.

5 people found this helpful

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mark
5.0 out of 5 stars Nice buy
Reviewed in the United States on September 11, 2025
Size: 16GB RAM | 256GB SSDStyle: Intel CPUVerified Purchase
So far so good. Great value

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Kindle Customer
5.0 out of 5 stars Great machine
Reviewed in the United States on August 18, 2025
Size: 16GB RAM | 256GB SSDStyle: Intel CPUVerified Purchase
Using it now. Provides the power ans speed that my wife and I need in our retirement.

3 people found this helpful

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Audine Kenney
5.0 out of 5 stars Good Bye windows 10
Reviewed in the United States on October 29, 2025
Size: 32GB RAM | 1TB SSDStyle: Intel CPUVerified Purchase
Monitor cable connection requires different cable than older computers. The small size is great as my backup computer.

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Richard Johnson
4.0 out of 5 stars Missing extension cord
Reviewed in the United States on September 19, 2025
Verified Purchase
The computer works fine, after I purchased a clover leaf extension cord to use with the power supply. Normally, something so basic is provided with the purchase.

2 people found this helpful

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Amazon Customer
5.0 out of 5 stars Good little machine.
Reviewed in the United States on July 17, 2025
Size: 16GB RAM | 256GB SSDStyle: Intel CPUVerified Purchase
It's a nice small unit with a good amount of guts. Just right for my wife.

One person found this helpful

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