Description
The YMTC PC550 is a solid-state drive in the M.2 2280 form factor, launched in March 2026. It is available in capacities 1 TB. This page reports specifications for the 1 TB variant. With the rest of the system, the YMTC PC550 interfaces using a PCI-Express 5.0 x4 connection. YMTC has installed 267-layer TLC NAND flash on the PC550, the flash chips are made by YMTC. To improve write speeds, a pseudo-SLC cache is used, so bursts of incoming writes are soaked up more quickly. Thanks to support for the fast PCI-Express 5.0 interface, performance is excellent. The PC550 is rated for sequential read speeds of up to 10,500 MB/s and 9,500 MB/s write; random IOPS reach up to 1300K for reads and 1300K for writes.
The YMTC PC550 1TB follows the standard M.2 2280 form factor — the long, gum-stick-shaped card that fits into the dedicated SSD slot found on most modern motherboards, laptops with high-performance configurations, and compatible add-in cards. This is the universal standard for high-performance NVMe drives, and it means installation is straightforward for anyone who has handled a modern build.
The PC550 delivers sequential read speeds of 10,500 MB/s and sequential write speeds of 9,500 MB/s. To give that context: a typical PCIe 4.0 drive peaks around 7,000 MB/s reads, and a PCIe 3.0 drive sits around 3,500 MB/s. The PC550’s read speed is essentially triple what most systems shipped with just a few years ago.
Performance
Sequential Read: 10,500 MB/s
Sequential Write: 9,500 MB/s
Random Read: 1,300,000 IOPS
Random Write: 1,300,000 IOPS
Endurance: 600 TBW
Warranty: 5 Years
MTBF: 2.0 Million Hours
Drive Writes Per Day (DWPD): 0.3
SLC Write Cache: Yes
Physical
Form Factor: M.2 2280 (Single-Sided)
Interface: PCIe 5.0 x4
Protocol: NVMe 2.0
Power Draw: 3.0 W (Idle) 6.0 W (Avg)
NAND Flash
Manufacturer: YMTC
Name: Xtacking 4.0 (X4-9070)
Type: TLC
Technology: 267-layer
Speed: 3600 MT/s
Capacity: 2 chips @ 4 Tbit
ONFI: 5.1
Topology: Charge Trap
Die Size: 52 mm²
(19.7 Gbit/mm²)
Dies per Chip: 4 dies @ 1 Tbit
Planes per Die: 6
Decks per Die: 2
Word Lines: 294 per NAND String
90.8% Vertical Efficiency
Endurance:
(up to) 3000 P/E Cycles
Page Size: 16 KB
