Bestoss 2TB NVMe M.2 2280 with

Only the specifications this product actually carries.

NVMe

NVMe (Non-Volatile Memory Express) is the protocol modern SSDs use to talk to the system over PCIe, replacing the older AHCI protocol designed for spinning disks. NVMe drives, almost always in the M.2 form factor, are several times faster than SATA SSDs in sequential transfers and much faster at handling many simultaneous requests. NVMe has become the default for new builds, and its price per gigabyte now overlaps with SATA on many capacities.

M.2 2280

M.2 is the compact card form factor for SSDs that plugs directly into a motherboard slot, and 2280 describes the dimensions: 22mm wide and 80mm long, the most common size for desktops and laptops. Other lengths exist, notably 2230 for handhelds like the Steam Deck. An M.2 slot may carry NVMe, SATA, or both, and a drive must match what the slot supports.

DRAM cache and DRAM-less (HMB)

Some SSDs include a small DRAM chip to hold the map of where data lives, which keeps performance steady under heavy use. DRAM-less drives instead borrow a slice of system memory through Host Memory Buffer (HMB), which works well for everyday use and lowers the price. DRAM-less designs are common in budget NVMe drives and are usually fine as a boot or game drive; the difference shows up under sustained mixed workloads.

SLC cache

Most TLC and QLC SSDs reserve part of their flash to operate in a fast single-level (SLC) mode as a write cache. Writes are quick until that cache fills, after which speed drops to the drive's native rate, sometimes sharply on QLC drives. Advertised write speeds usually describe cache speed. The cache size and the speed after it fills matter for anyone regularly copying large files.

Sequential read and write speeds

The headline speeds on an SSD listing, such as 7,450 MB/s read, describe large sequential transfers under ideal conditions. They are the numbers that separate PCIe generations, and they are the least representative of everyday use, where small random reads dominate and most modern drives feel similar. Two drives with different headline speeds but the same generation and NAND type usually perform indistinguishably for gaming and desktop work.

Heatsink

Some NVMe drives ship with an attached heatsink to keep the controller from throttling under sustained load; others ship bare. Most motherboards include their own M.2 heatsinks, and a drive with a built-in heatsink may not fit under them or in a laptop. Gen5 drives are the ones that most often need cooling. The heatsink version of a drive is a separate product with its own price, which is why MemRadar lists it on its own page.