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 2 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 SSD will be available in both M.2 2242 and M.2 2280 form factors and is primarily targeted at AI PCs and commercial client systems. According to the company, the drive can offer up to 10,500 MB/s sequential read and up to 10,000 MB/s sequential write on the 2TB variant. While that makes it considerably faster than some of the best PCIe 4.0 SSDs, it isn’t the fastest among PCIe 5.0 drives, as other manufacturers offer products capable of reaching speeds close to 15,000 MB/s.

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