4 TB U.2 / U.3 SSDs

The one 4 TB class U.2 / U.3 SSD on this page is the Samsung PM9A3 3.84TB NVMe U.2 SSD (MZ-QL23T800), an enterprise drive for servers and workstations. It runs on PCIe 4.0 NVMe, reads at up to 6900 MB/s, writes at up to 4100 MB/s and has power loss protection. Samsung covers it with a 5 year warranty.

Check that the system has a U.2 port or an NVMe U.2 / U.3 backplane. Most desktop motherboards have neither, so the drive then needs an adapter card in a spare PCIe slot, plus steady airflow over it.

Frequently asked questions

Why is it 3.84TB and not 4TB? Enterprise drives keep extra flash in reserve for endurance and steady performance, so 3.84TB is the usual 4 TB class figure.

Can the PM9A3 work in a desktop PC? Yes, through an adapter card in a PCIe 4.0 slot, with good airflow over the drive.