Which memory fits the HP ProBook 645 G2? OEM part numbers

5 memories are documented for the HP ProBook 645 G2: 691739-001, 691740-001, 693374-001, 820569-001, 820570-001. 5 of 5 come from OEM documentation (h10032.www1.hp.com); last checked 2026-11-04. Not bench-tested: match the number on your old memory and any constraint before ordering.

Part number	Part	Constraints	Confidence	Last checked
691739-001	HP Memory 691739-001	HP description: "2GB PC3L shared memory module, 1600MHz". OEM documentation only; not bench-tested.	OEM documented	2026-11-04
691740-001	HP Memory 691740-001	HP description: "4GB PC3L shared memory module, 1600MHz". OEM documentation only; not bench-tested.	OEM documented	2026-11-04
693374-001	HP Memory 693374-001	HP description: "8GB PC3L shared memory module, 1600MHz". OEM documentation only; not bench-tested.	OEM documented	2026-11-04
820569-001	HP Memory 820569-001	HP description: "4GB DDR4 shared memory module, 2133MHz, 1.2V". OEM documentation only; not bench-tested.	OEM documented	2026-11-04
820570-001	HP Memory 820570-001	HP description: "8GB DDR4 shared memory module, 2133MHz, 1.2V". OEM documentation only; not bench-tested.	OEM documented	2026-11-04

Where do these HP ProBook 645 G2 memory part numbers come from?

5 of 5 fits are from OEM documentation (h10032.www1.hp.com); each row links its source. Last checked 2026-11-04.

Are these memories tested in the HP ProBook 645 G2?

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 645 G2.

Other parts for the HP ProBook 645 G2

Service Part (20) · Hinge Cover (5) · Keyboard (6) · Touchpad (8) · Card Reader (1) · RTC Battery (1) · Fan (5) · Motherboard (33) · Fingerprint Reader (3) · Speakers (1) · I/O Board (1) · Bottom Cover (4) · Wireless Card (1) · Battery (1) · Display Bezel (4) · Screen (8) · Cable (4) · Display Cable (4) · Display Back Cover (4) · SSD (30) · Hard Drive (6) · Power Adapter (5) · Antenna (2) · Screw Kit (2) · Hinge (3) · Camera (1) · Microphone (1)

For AI agents: the same list as JSON from the free MCP server at /mcp (tool get_model_parts, model hp-probook-645-g2) or the keyless JSON API.