HP ProDesk 680 G4 Microtower

An 8th-generation Intel Core (Coffee Lake) business microtower, HP's higher-end MT configuration for this generation of the 600-series chassis.

Memory

Bays: 1 x 5.25" bay (behind bezel; accepts a slim optical drive or a blank) + 2.5" and 3.5" hard-drive bays in the internal drive cage
M.2: M.2 2280 PCIe NVMe or SATA-3 SSD, up to 1 TB (also available with self-encryption/OPAL2 or FIPS)
2.5"/3.5" options: Up to 2 TB 7200-rpm HDD, hybrid SSHD, or 2.5" SATA-3 SSD; FIPS and OPAL2 self-encrypting variants available

Options (add-in cards): AMD Radeon RX 580 4 GB (full-height, 3 x DisplayPort + HDMI, PCIe x16); AMD Radeon RX 550 4 GB (2 x DisplayPort, or full-height with 2 x DisplayPort + HDMI); AMD Radeon R7 430 2 GB (various low-profile 2xDP, DP+VGA, or China-market single-output variants)

WLAN options: Intel Wireless-AC 9560 802.11ac 2x2 + Bluetooth 5 (vPro or non-vPro); Intel Wireless-AC 9260 802.11ac (non-vPro, PCIe x1 card); Realtek 8822BE 802.11ac (PCIe x1 card); Realtek 802.11ac 2x2 + Bluetooth 4.2 or 1x1 + Bluetooth 4.2 (M.2 2230)

Supply: 400 W (92% efficient, 3 output connectors) or 250 W (92% efficient, 1 output connector) internal power supply, active PFC

Front: 5.25" drive bay (behind bezel); slim optical drive (optional); dual-state power button; hard-drive activity light; audio-out (headphone)/audio-in (microphone) combo jack; USB port with HP Sleep and Charge; USB port; 2 x USB SuperSpeed ports; USB Type-C charging port; memory card reader
Rear: Audio-out jack for powered speakers; 2 x DisplayPort monitor connectors; 1 optional port (varies by configuration); 2 x USB ports with Wake from S4/S5; 4 x USB SuperSpeed ports; audio-in jack; RJ-45 network jack; serial port (select products only); power cord connector