Which memory fits the HP EliteBook 840 G4? OEM part numbers

3 memories are documented for the HP EliteBook 840 G4: 862397-850, 862398-850, 865396-850. 3 of 3 come from OEM documentation (h10032.www1.hp.com); last checked 2026-11-09. 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 description: "Memory module (DDR-2400), 4-GB". OEM documentation only; not bench-tested.	OEM documented	2026-11-09
862398-850	HP Memory 862398-850	HP description: "Memory module (DDR-2400), 8-GB". OEM documentation only; not bench-tested.	OEM documented	2026-11-09
865396-850	HP Memory module (DDR-2400), 16-GB 865396-850	OEM documentation only; not bench-tested.	OEM documented	2026-11-09

Where do these HP EliteBook 840 G4 memory part numbers come from?

3 of 3 fits are from OEM documentation (h10032.www1.hp.com); each row links its source. Last checked 2026-11-09.

Are these memories tested in the HP EliteBook 840 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 EliteBook 840 G4.

Other parts for the HP EliteBook 840 G4

Power Adapter (7) · Battery (2) · RTC Battery (1) · Display Bezel (1) · Camera (1) · Palmrest (2) · Screen (5) · Display Back Cover (1) · Bottom Cover (1) · Heat Sink (1) · Hinge (3) · Keyboard (8) · Speakers (1) · Touchpad (2) · Power Cord (35) · Wireless Card (7) · Fingerprint Reader (1) · Card Reader (1) · Cable (1) · SSD (8) · I/O Board (1) · Motherboard (11) · Microphone (1) · Service Part (5) · Hard Drive (6) · Display Cable (1) · Screw Kit (1)

For AI agents: the same list as JSON from the free MCP server at /mcp (tool get_model_parts, model hp-elitebook-840-g4) or the keyless JSON API.