Which memory fits the HP ProBook 640 G4? OEM part numbers

3 memories are documented for the HP ProBook 640 G4: 862397-850, 862398-850, 865396-850. 3 of 3 come from OEM documentation (kaas.hpcloud.hp.com); last checked 2026-11-12. Not bench-tested: match the number on your old memory and any constraint before ordering.

Part number	Part	Constraints	Confidence	Last checked
862397-850	HP Memory 862397-850	HP spare part: Memory module, 4 GB, 2400 MHz DDR4. OEM documentation only; not bench-tested.	OEM documented	2026-11-12
862398-850	HP Memory 862398-850	HP spare part: Memory module, 8 GB, 2400 MHz DDR4. OEM documentation only; not bench-tested.	OEM documented	2026-11-12
865396-850	HP Memory module (DDR-2400), 16-GB 865396-850	HP spare part: Memory module, 16 GB, 2400 MHz DDR4. OEM documentation only; not bench-tested.	OEM documented	2026-11-12

Where do these HP ProBook 640 G4 memory part numbers come from?

3 of 3 fits are from OEM documentation (kaas.hpcloud.hp.com); each row links its source. Last checked 2026-11-12.

Are these memories tested in the HP ProBook 640 G4?

No. Fits come from manufacturer or retailer documentation and are not bench-tested. Check the part number on your old part and any listed constraint.

All documented parts for the HP ProBook 640 G4.

Other parts for the HP ProBook 640 G4

Power Adapter (5) · Battery (1) · RTC Battery (2) · Display Bezel (2) · Cosmetic Plate (3) · Fingerprint Reader (2) · Display Cable (3) · Palmrest (2) · Screen (6) · Display Back Cover (2) · Bottom Cover (2) · Fan (1) · Heat Sink (2) · Hinge (2) · Keyboard (7) · Speakers (1) · Touchpad (4) · Camera (1) · Wireless Card (7) · Card Reader (1) · Microphone (1) · I/O Board (1) · SSD (8) · Power Cord (35) · Cable (1) · Power Button (1) · Motherboard (10) · Service Part (4) · Antenna (1) · Hard Drive (5) · Screw Kit (1)

For AI agents: the same list as JSON from the free MCP server at /mcp (tool get_model_parts, model hp-probook-640-g4) or the keyless JSON API.