How much RAM does the HP OMEN 40L GT21-1355st support?

The OMEN 40L GT21-1355st supports up to 128GB of memory across 4 slot(s), up to 32GB per slot.

What type of memory does the OMEN 40L GT21-1355st use?

It uses DDR5 UDIMM memory modules.

Compatible drive types: NVMe M.2 2280 (PCIe Gen 4) SSD, SATA 2.5" SSD, SATA 3.5" Hard Drive, SATA M.2 2280 SSD.

Guaranteed-compatible DDR5 UDIMM upgrades for the HP OMEN 40L GT21-1355st, in matched-kit options that fill your slots.

Verified compatible

This option is out of stock.

Guaranteed-compatible SSD and hard-drive upgrades for the HP OMEN 40L GT21-1355st — matched to its drive bays and slots.

This option is out of stock.

This option is out of stock.

This option is out of stock.

Compatibility is based on published specifications, not yet confirmed against a manufacturer tool.

This option is out of stock.

This is a SATA (not NVMe) M.2 drive — confirm your M.2 slot supports SATA drives.

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Guaranteed-compatible DDR5 UDIMM upgrades for the HP OMEN 40L GT21-1355st, in matched-kit options that fill your slots.

Verified compatible

This option is out of stock.

Guaranteed-compatible SSD and hard-drive upgrades for the HP OMEN 40L GT21-1355st — matched to its drive bays and slots.

This option is out of stock.

This option is out of stock.

This option is out of stock.

Compatibility is based on published specifications, not yet confirmed against a manufacturer tool.

This option is out of stock.

This is a SATA (not NVMe) M.2 drive — confirm your M.2 slot supports SATA drives.

Rated speed	6400 MT/s

Good to know

These modules run below the system's maximum supported speed.
Maximum capacity per slot is inferred from total capacity ÷ number of slots.
Compatibility is based on published specifications, not yet confirmed against a manufacturer tool.