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Western Digital SN740 2 TB

2 TB
Capacity
WD 20-82-10081
Controller
TLC
Flash
PCIe 4.0 x4
Interface
M.2 2230
Form Factor
PCB Front
Tom's Hardware
PCB Front
SSD Controller
Controller
The Western Digital SN740 is a solid-state drive in the M.2 2230 form factor, launched on May 9th, 2022. It is available in capacities ranging from 256 GB to 2 TB. This page reports specifications for the 2 TB variant. With the rest of the system, the Western Digital SN740 interfaces using a PCI-Express 4.0 x4 connection. The SSD controller is the 20-82-10081-A1 Polaris MP16+ from WD, a DRAM cache is not available. Western Digital has installed 112-layer TLC NAND flash on the SN740, the flash chips are made by Kioxia. To improve write speeds, a pseudo-SLC cache is used, so bursts of incoming writes are soaked up more quickly. The cache is sized at 160 GB. Copying data out of the SLC cache (folding) completes at 400 MB/s. Thanks to support for the fast PCI-Express 4.0 interface, performance is excellent. The SN740 is rated for sequential read speeds of up to 5,150 MB/s and 4,850 MB/s write; random IOPS reach up to 650K for reads and 800K for writes.
At its launch, the SSD was priced at 300 USD. The warranty length is set to five years, which is an excellent warranty period. Western Digital guarantees an endurance rating of 500 TBW, a relatively low value compared to other SSDs.

Solid-State-Drive

Capacity: 2 TB (2048 GB)
Variants: 256 GB 512 GB 1 TB 2 TB
Overprovisioning: 140.7 GB / 7.4 %
Production: Active
Released: May 9th, 2022
Price at Launch: 300 USD
Part Number: SDDQTQE-2T00
Market: Consumer

Physical

Form Factor: M.2 2230
Interface: PCIe 4.0 x4
Protocol: NVMe 1.4
Power Draw: 0.96 W (Idle)
3.7 W (Avg)
4.6 W (Max)

Controller

Manufacturer: WD
Name: 20-82-10081-A1 Polaris MP16+
Architecture: ARM 32-bit Cortex-R
Foundry: TSMC FinFET
Process: 16 nm
Flash Channels: 4 @ 1,600 MT/s
Chip Enables: 4
Controller Features: HMB (enabled)

NAND Flash

Manufacturer: Kioxia
Name: BiCS5 HDR
Part Number: 060682 2T00
Type: TLC
Technology: 112-layer
Speed: 1200 MT/s
Capacity: 1 chip @ 16 Tbit
Toggle: 4.0
Topology: Charge Trap
Dies per Chip: 16 dies @ 1 Tbit
Planes per Die: 2
Word Lines: 128 per NAND String
87.5% Vertical Efficiency
Read Time (tR): 56 µs
Endurance:
(up to)
3000 P/E Cycles
(100000 in SLC Mode)
Page Size: 16 KB
Block Size: 1344 Pages

DRAM Cache

Type: None
Host-Memory-Buffer (HMB): 64 MB

Performance

Sequential Read: 5,150 MB/s
Sequential Write: 4,850 MB/s
Random Read: 650,000 IOPS
Random Write: 800,000 IOPS
Endurance: 500 TBW
Warranty: 5 Years
MTBF: 1.8 Million Hours
Drive Writes Per Day (DWPD): 0.1
SLC Write Cache: approx. 160 GB
(dynamic only)
Cache Folding Speed: 400 MB/s

Features

TRIM: Yes
SMART: Yes
Power Loss Protection: No
Encryption:
  • TCG Opal
  • TCG Pyrite
RGB Lighting: No
PS5 Compatible: Yes

Notes

Drive:

SDDPTQE-2T00 doesn't offer Security Encription
SDDQTQE-2T00 offer Security Encription
MTBF: 1.75 Millions of Hours

NAND Die:

Typ. Endurance: 1700 P/E Cycle
Endurance could be from 3000 to 5000 P/E Cycles

Oct 5th, 2024 03:08 EDT change timezone

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