WD 20-82-01008
Controller
Multiple hardware versions found.
Performance could vary due to unannounced flash/controller changes.
Ixbt
PCB Front
Ixbt
PCB Back
Controller
NAND Die
The Western Digital SN350 is a solid-state drive in the M.2 2280 form factor, launched on February 15th, 2021. It is available in capacities ranging from 1 TB to 2 TB. This page reports specifications for the 2 TB variant. With the rest of the system, the Western Digital SN350 interfaces using a PCI-Express 3.0 x4 connection. The SSD controller is the 20-82-01008-A2 Polaris MP16 from WD, a DRAM cache is not available. Western Digital has installed 96-layer QLC NAND flash on the SN350, the flash chips are made by Toshiba. Please note that this SSD is sold in multiple variants with different NAND flash or controller, which could affect performance, the "Notes" section at the end of this page has more info. To improve write speeds, a pseudo-SLC cache is used, so bursts of incoming writes are absorbed more quickly. The cache is sized at 480 GB, once it is full, writes complete at 180 MB/s. The SN350 is rated for sequential read speeds of up to 3,200 MB/s and 3,000 MB/s write; random IO reaches 500K IOPS for read and 450K for writes.
At its launch, the SSD was priced at 44 USD. The warranty length is set to three years, which is above average, but shorter than the five years offered by many other vendors. Western Digital guarantees an endurance rating of 100 TBW, a very low value compared to other SSDs.
Solid-State-Drive
Capacity: |
2 TB
(2000 GB)
|
Variants: |
1 TB
2 TB
|
Hardware Versions: |
|
Overprovisioning: |
185.4 GB
/ 10.0 %
|
Production: |
Active |
Released: |
Feb 15th, 2021 |
Price at Launch: |
44 USD |
Part Number: |
WDS200T3G0C |
Market: |
Consumer |
Physical
Form Factor: |
M.2 2280
(Single-Sided)
|
Interface: |
PCIe 3.0 x4 |
Protocol: |
NVMe 1.3 |
Power Draw: |
0.11 W (Idle)
Unknown (Avg)
5.0 W (Max)
|
Controller
Manufacturer: |
WD |
Name: |
20-82-01008-A2 Polaris MP16 |
Architecture: |
ARM 32-bit Cortex-R |
Core Count: |
Triple-Core |
Foundry: |
TSMC FinFET |
Process: |
16 nm |
Flash Channels: |
4
@ 1,200 MT/s
|
Chip Enables: |
4 |
Controller Features: |
HMB
(enabled)
|
NAND Flash
Manufacturer: |
Toshiba |
Name: |
BiCS4 |
Type: |
QLC |
Technology: |
96-layer |
Speed: |
533 MT/s .. 800 MT/s |
Capacity: |
1 chip @ Unknown
|
Toggle: |
3.2 |
Topology: |
Charge Trap |
Die Size: |
158 mm² (8.4 Gbit/mm²) |
Planes per Die: |
2 |
Decks per Die: |
2 |
Word Lines: |
109 per NAND String
88.1% Vertical Efficiency
|
Read Time (tR): |
160 µs |
Program Time (tProg): |
3290 µs |
Die Read Speed: |
200 MB/s |
Die Write Speed: |
10 MB/s |
Page Size: |
16 KB |
Block Size: |
1536 Pages |
Plane Size: |
3642 Blocks |
DRAM Cache
Type: |
None |
Host-Memory-Buffer (HMB): |
64 MB |
Performance
Sequential Read: |
3,200 MB/s |
Sequential Write: |
3,000 MB/s |
Random Read: |
500,000 IOPS |
Random Write: |
450,000 IOPS |
Endurance: |
100 TBW
|
Warranty: |
3 Years |
MTBF: |
1.0 Million Hours |
Drive Writes Per Day (DWPD): |
0.0 |
SLC Write Cache: |
approx. 480 GB
(dynamic only)
|
Speed when Cache Exhausted: |
approx. 180 MB/s |
Features
TRIM: |
Yes |
SMART: |
Yes |
Power Loss Protection: |
No |
Encryption: |
|
RGB Lighting: |
No |
PS5 Compatible: |
No |