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Green rectangular circuit board with gold edge connectors and black memory chips

HP

HP 4M9Y4AA 8GB 262-Pin DDR5 4800 laptop RAM

SKU CH-3QJG-YYZAD MPN 4M9Y4AA

8GB DDR5 4800 laptop SO-DIMM with 262 pins for faster notebook performance

  • Total capacity8 GB
  • Rated speedDDR5 4800 (PC4 38400)
  • Product type262-Pin DDR5 SO-DIMM
  • 8GB capacity lets you run more apps at once
  • DDR5 4800 speed moves data at PC4 38400 bandwidth
  • 262-pin SO-DIMM fits standard DDR5 laptop slots
  • HP branded module built to manufacturer specifications
  • New condition means full factory reliability

HP 8GB DDR5 4800 SO-DIMM

This HP 4M9Y4AA module delivers 8GB of DDR5 memory at 4800 MT/s in a 262-pin SO-DIMM form factor. It is built for notebooks that support DDR5 4800 (PC4 38400) non-ECC memory. The single-rank stick installs in a standard laptop slot to add capacity or replace an existing module.

Suits DDR5 laptops needing a single 8GB upgrade

Owners of DDR5-equipped notebooks with a free SO-DIMM slot can use this module to increase system memory. Systems limited to earlier DDR generations cannot accept this part because the pin layout and signalling are different. Buyers who require ECC error correction or a matched multi-module kit should consider other options.

262-pin DDR5 SO-DIMM interface

The decisive specification is the 262-pin DDR5 SO-DIMM interface running at 4800 MT/s (PC4 38400). Only laptops designed for this exact generation and pin count will recognise and operate the module correctly.

How it compares

Measured against everything we stock in Laptop RAM, at today’s prices. Recalculated every night.

Price $110.99
Pricier than about 63% of the 2,079 comparable items (median $70.99).
Total capacity 8 GB
Lower than about 60% of the 1,886 comparable items (median 16 GB).
Price per GB $13.87 per GB
Pricier than about 90% of the 1,886 comparable items (median $5.94 per GB).

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Specifications

Product
Brand nameHP
Model name4M9Y4AA
Total capacity8 GB
Product type262-Pin DDR5 SO-DIMM
Performance
Rated speedDDR5 4800 (PC4 38400)
Size & build
Shipping weight0.07 kg
Package size229 × 159 × 19 mm

Questions about this item

Is the 8GB 262-Pin DDR5 4800 module the only capacity available for this HP 4M9Y4AA model?

Yes, this part number 4M9Y4AA is supplied as a single 8GB DDR5 4800 SO-DIMM with 262 pins.

What real-world bandwidth does the DDR5 4800 (PC4 38400) rating deliver once installed?

The PC4 38400 designation indicates a maximum theoretical transfer rate of 38400 MB/s under ideal conditions.

Does the 262-pin DDR5 SO-DIMM interface limit the module to 4800 MT/s in practice?

The 262-pin DDR5 SO-DIMM form factor supports DDR5 signalling; this module is rated at 4800 MT/s and will run at that speed if the platform allows it.

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