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HP ProDesk 400 G9 small form factor desktop, compact black chassis, front USB-C and USB-A ports, rear HDMI and DisplayPort

HP

HP ProDesk 400 G9 SFF i9-12900K 64GB DDR5 2TB NVMe Windows 11 Pro

SKU CH-GX84-TGJGM

Compact business desktop with a 16-core Intel Core i9-12900K, 64 GB DDR5, 2 TB NVMe storage and Windows 11 Pro

  • TypeBusiness Desktops & Workstations
  • Form FactorMini PC
  • Operating SystemWindows 11 Pro
  • UsageRetail
  • AudioSound card - Integrated
  • EthernetGigabit Ethernet
  • 16-core i9-12900K reaches 5.20 GHz for demanding workloads
  • 64 GB DDR5 4800 memory handles heavy multitasking
  • 2 TB PCIe NVMe SSD stores large datasets quickly
  • WiFi 6E and Bluetooth 5.3 give fast wireless links
  • Small form factor fits tight desk spaces

Business desktop for multitasking workloads

The HP ProDesk 400 G9 SFF pairs an Intel Core i9-12900K with 64GB DDR5 4800 memory and a 2TB NVMe drive. Windows 11 Pro is pre-installed. The small form factor fits tight desk spaces while delivering 16-core processing power for office applications, data analysis and multi-monitor productivity.

Memory and storage headroom

64GB DDR5 reaches the platform maximum, so no further memory upgrades are possible. The 2TB NVMe SSD provides fast boot and application loading with room for large project files. One 3.5-inch bay remains open for a mechanical drive if additional bulk storage is required later.

Thermals and power in daily use

A 180W power supply feeds the CPU, integrated Intel UHD Graphics 770 and all onboard peripherals. The compact chassis relies on managed airflow to keep temperatures stable during sustained business workloads. Fan noise stays low in typical office scenarios, rising only under prolonged maximum turbo frequencies.

Highlights

  • 16-core i9-12900K reaches 5.20 GHz for demanding workloads
  • 64 GB DDR5 4800 memory handles heavy multitasking
  • 2 TB PCIe NVMe SSD stores large datasets quickly
  • WiFi 6E and Bluetooth 5.3 give fast wireless links
  • Small form factor fits tight desk spaces

Specifications

TypeBusiness Desktops & Workstations
Form FactorMini PC
Operating SystemWindows 11 Pro
UsageRetail
AudioSound card - Integrated
EthernetGigabit Ethernet
Power Supply180W
MonitorMonitor not included
Windows 11Ready
CPU TypeIntel Core i9 12th Gen
CPU NameIntel Core i9-12900K
GPU/VGA TypeIntel UHD Graphics 770
Graphics InterfacePCI Express 2.0 x16
Memory Capacity64GB DDR5
Memory SpeedDDR5 4800
Memory Slots (Available/Total)0
Maximum Memory Supported64 GB
SSD2 TB PCIe
HDDNo
LAN Speed10/100/1000Mbps
WLAN802.11ax Wireless LAN
LAN ChipsetIntegrated
WiFi GenerationWi-Fi 6
BluetoothBluetooth 5.3
BrandHP
Seriespro series
Model400 SFF G9
Screen SizeN/A
Audio ChipsetIntegrated
Front USB3x USB-A 3.2, 1x USB-C 3.2
Front Audio Ports1
Video Ports1 Display Port, 1 HDMI
Rear USB2x USB-A 2.0, 3x USB-A 3.2
RJ451 port
Keyboard TypeWired Keyboard
Mouse TypeWired Mouse
Speaker ConfigurationInternal Speaker

Questions about this item

Will my existing 3.5" hard drive fit in the additional storage slot of this HP ProDesk 400 G9 SFF?

Yes, the chassis includes one 3.5" HDD bay so you can keep using your current mechanical drive alongside the 2 TB NVMe SSD already installed.

How can I verify the Intel Core i9-12900K is running at its full 5.20 GHz boost after setup?

Open Task Manager's Performance tab or a tool such as HWMonitor; the CPU clock should reach 5.20 GHz on the performance cores under heavy single-threaded load.

Does the box contain a monitor or only the desktop, keyboard, mouse and power cable?

The package includes the Small Form Factor desktop, a USB keyboard, a USB mouse and the power cable; a monitor is not included and must be purchased separately.

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