HP ProDesk 400 G9 SFF desktop PC, Intel Core i9-14900K, 16GB DDR5, 1TB NVMe SSD, Windows 11 Pro

Compact business desktop for intensive workloads

The HP ProDesk 400 G9 SFF delivers a 24-core Intel Core i9-14900K processor with speeds from 2.40 GHz to 6.0 GHz and 36 MB cache. Sixteen gigabytes of DDR5 4800 memory and a 1 TB PCIe NVMe SSD provide responsive performance for demanding professional applications. Integrated Intel UHD Graphics 770 drives up to two displays via HDMI 1.4b and DisplayPort 1.4a. Windows 11 Pro is pre-installed.

Verify expansion limits

The 180 W power supply and small form factor restrict add-in cards to low-profile designs. One PCI Express 4.0 x16 slot and one PCI Express 3.0 x1 slot are available for upgrades. Both DDR5 slots are occupied by the factory 16 GB kit; expanding to the 64 GB maximum requires replacing the existing modules. A single 3.5-inch drive bay offers additional storage capacity. No optical drive is fitted.

Efficient cooling within a tight thermal envelope

The 180 W power supply defines the system’s sustained power draw, keeping heat output modest for a 24-core CPU. Integrated graphics eliminate the noise and power overhead of a discrete card. Fan speed scales with workload, remaining quiet during typical office tasks and increasing only under prolonged heavy compute loads. Gigabit Ethernet, WiFi 6E and Bluetooth 5.3 maintain connectivity without adding thermal load.