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We made them small to help you make it big
Unclutter your desk with the ultra-small HP ProDesk 400 Desktop Mini. Compact yet powerful, this next-gen mini PC packs the performance and industry leading security software you need to work efficiently at a great price.
Do more on dual displays with DisplayPort 1.2 and full HD VGA ports, plus use 6 USB ports to plug in all the peripherals you need.

Power-saving processors.
Help reduce energy use and costs with processors that consume less than half the energy of those in other mini PCs.
Fearless flexibility
Use it in a kiosk, as digital signage, and more. Take advantage of expandability and compatibility with the HP mini accessories.
HP Client Security
HP Client Security suite helps you quickly and easily to encrypt your hard drive, permanently delete unwanted or discarded data, restrict unauthorized access, and more.
HP BIOS Protection
Do away with downtime. HP BIOS Protection's automated recovery restores a copy of the BIOS from a partition on the hard drive if crisis strikes so productivity prevails without missing a beat.
Trusted Platform Module
The embedded Trusted Platform Module 1.2 (TPM) provides hardware-based encryption keys to help secure your data, e-mail, and user credentials.
Smaller than a book, the HP ProDesk 400 Desktop Mini can fit almost anywhere vertically or horizontally. The clean, easily serviceable design and flexible deployment options to help optimize the workspace.
| Form Factor | Mini |
| Available Operating System | Windows 7 Professional 64-Bit with Windows 8.1 Pro License Motherboard |
| Chipset | Intel® H81 Express |
| Maximum Memory | 16 GB DDR3-1600 SDRAM DDR3-1600 SDRAM |
| Memory Slots | 2 SODIMM |
| Internal storage | 500 GB 7200 RPM |
| Available Graphics | Integrated: Intel® HD Graphics |
| Audio | DTS Studio Sound™. HD audio with Realtek ALC221 codec (all ports are stereo), microphone and headphone front ports (3.5 mm), multi-streaming capable, internal speaker |
| Expansion slots | 1 M.2 for optional wireless NIC; 1 M.2 for optional SSD drive |
| Available Graphics | Integrated Intel® HD Graphics |
| Audio | DTS Sound+™, Realtek ALC 221 Audio (all ports stereo), microphone and headphone jacks, stereo audio line out and integrated speaker |
| Communications | Intel® I217LM gigabit network connection (standard); Intel® Dual Band Wireless-N 7260 PCIe 802.11a/b/g/n (optional) |
| Ports and connectors | Front: 2 USB 3.0 Back: 4 USB 2.0; 1 VGA; 1 DisplayPort; 1 RJ-45 (Support for VESA 100 mm mounting system on bottom of PC chassis) |
| Internal Drive Bays | One 2.5" |
| Security Management | Trusted Platform Module (TPM) 1.2; SATA port disablement (via BIOS); Drive lock; Serial, parallel, USB enable/disable (via BIOS); Optional USB port disable at factory (user configurable via BIOS); Removable media write/boot control; Power-on password (via BIOS); Administrator password (via BIOS); Support for chassis padlocks and cable devices; Solenoid hood lock/sensor |
| Power | 65 W 87% efficient, active PFC (external) |
| Compatible HP Commercial Monitors | EliteDisplay: HP EliteDisplay E201 (C9V73AA), HP EliteDisplay E221 (C9V76AA), HP EliteDisplay E231 (C9V75AA), HP EliteDisplay E271i (D7Z72AA), HP EliteDisplay E221c (D9E49AA) ProDisplay: HP ProDisplay P191 (C9E54AA), HP ProDisplay P201 (C9F26AA), HP ProDisplay P221 (C9E49AA) Other: HP LA2405x (D0P36AA), HP L2206tm (B0L55AA) |
| Dimensions | 6.9 x 7 x 1.3 in 17.5 x 17.7 x 3.4 cm |
| Weight | 2.9 lb 1.3 kg |
| Energy Efficiency Compliance | ENERGY STAR® certified and EPEAT® registered configurations available |
| Warranty and services | 3-year (3-3-3) limited warranty and service offering includes 3 years of parts, labor and on-site repair. Terms and conditions vary by country. Certain restrictions and exclusions apply. |
Unclutter your desk with the ultra small HP ProDesk 400 Desktop Mini. Compact yet powerful, this next-gen mini PC packs the performance and industry leading security software you need to work efficiently and safely-at a great price.