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SanDisk Ultra II 120GB vs Western Digital WD Blue SN550 NVMe SSD 250GB

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Specification Charts

Capacity

WD Blue SN550 NVMe SSD 250GB 250 GB
Ultra II 120GB 120 GB
Difference: 130 (108%)

Random Read

WD Blue SN550 NVMe SSD 250GB 170000 IOPS
Ultra II 120GB 81000 IOPS
Difference: 89000 (110%)

Random Write

WD Blue SN550 NVMe SSD 250GB 135000 IOPS
Ultra II 120GB 80000 IOPS
Difference: 55000 (69%)

Sequential Read

WD Blue SN550 NVMe SSD 250GB 2400 MB/sec
Ultra II 120GB 550 MB/sec
Difference: 1850 (336%)

Sequential Write

WD Blue SN550 NVMe SSD 250GB 950 MB/sec
Ultra II 120GB 500 MB/sec
Difference: 450 (90%)

Endurance

WD Blue SN550 NVMe SSD 250GB 150 TB
Ultra II 120GB 54 TB
Difference: 96 (178%)

Specifications

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Model Ultra II 120GB WD Blue SN550 NVMe SSD 250GB
Manufacturer SanDisk Western Digital
NAND SanDisk 2nd Gen 128Gbit 19nm TLC SanDisk 96L TLC
Form Factor 2.5" M.2 (2280)
Capacity 120 GB 250 GB
Cache 5120 MB (N/A) MB
Sequential Read 550 MB/s 2400 MB/s
Sequential Write 500 MB/s 950 MB/s
Random Read 81000 IOPS 170000 IOPS
Random Write 80000 IOPS 135000 IOPS
Interface SATA III 6Gb/s NVMe 1.4
Controller Marvell 88SS9190 WD Architecture
Date Released 2014 2019
Endurance 54 TB 150 TB
Notes 3 Year Warranty 5-Year Warranty

Price Comparison

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Ultra II 120GB

Amazon.com

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WD Blue SN550 NVMe SSD 250GB

Amazon.com

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