How much RAM does the HP 21-b0004nk All-in-One support?

The 21-b0004nk All-in-One supports up to 64GB of memory across 2 slot(s), up to 32GB per slot.

What type of memory does the 21-b0004nk All-in-One use?

It uses DDR4 SODIMM 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 DDR4 SODIMM upgrades for the HP 21-b0004nk All-in-One, in matched-kit options that fill your slots.

Verified compatible

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Guaranteed-compatible DDR4 SODIMM upgrades for the HP 21-b0004nk All-in-One, in matched-kit options that fill your slots.

Verified compatible

Good to know

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.

Guaranteed-compatible SSD and hard-drive upgrades for the HP 21-b0004nk All-in-One — matched to its drive bays and slots.

This option is out of stock.

Your slot's PCIe generation isn't published; the drive adjusts to it automatically.

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.