Product comparison · 2 internal solid state drives

Samsung SM863 1.92 TB 2.5" Serial ATA III vs Samsung SM951 128 GB M.2 PCI Express 3.0

Key differences

SSD capacity
- SM863 1.92 TB 2.5" Serial ATA III:1.92 TB
- SM951 128 GB M.2 PCI Express 3.0:128 GB
SSD form factor
- SM863 1.92 TB 2.5" Serial ATA III:2.5"
- SM951 128 GB M.2 PCI Express 3.0:M.2
Interface
- SM863 1.92 TB 2.5" Serial ATA III:Serial ATA III
- SM951 128 GB M.2 PCI Express 3.0:PCI Express 3.0
Read speed
- SM863 1.92 TB 2.5" Serial ATA III:520 MB/s
- SM951 128 GB M.2 PCI Express 3.0:2000 MB/s
Write speed
- SM863 1.92 TB 2.5" Serial ATA III:485 MB/s
- SM951 128 GB M.2 PCI Express 3.0:650 MB/s
Width
- SM863 1.92 TB 2.5" Serial ATA III:100.2 mm
- SM951 128 GB M.2 PCI Express 3.0:22 mm
Depth
- SM863 1.92 TB 2.5" Serial ATA III:6.8 mm
- SM951 128 GB M.2 PCI Express 3.0:80 mm
Height
- SM863 1.92 TB 2.5" Serial ATA III:69.8 mm
- SM951 128 GB M.2 PCI Express 3.0:4 mm

Differences highlightedShow differences only

Comparison of SM863, SM951
24 specifications	A Samsung SM863 1.92 TB 2.5" Serial ATA III Model SM863 View product	B Samsung SM951 128 GB M.2 PCI Express 3.0 Model SM951 View product
Features5 differ
SSD capacityDiffers	1.92 TB	128 GB
SSD form factorDiffers	2.5"	M.2
InterfaceDiffers	Serial ATA III	PCI Express 3.0
Security algorithmsKnown for one	256-bit AES	Unknown — not stated by the source
Data transfer rateKnown for one	6 Gbit/s	Unknown — not stated by the source
Read speedDiffers	520 MB/s	2000 MB/s
Write speedDiffers	485 MB/s	650 MB/s
Random read (4KB)Known for one	97000 IOPS	Unknown — not stated by the source
Random write (4KB)Known for one	29000 IOPS	Unknown — not stated by the source
Mean time between failures (MTBF)Known for one	2000000 h	Unknown — not stated by the source
PCI Express interface data lanesKnown for one	Unknown — not stated by the source	x4
Poweridentical
Operating voltageKnown for one	5 V	Unknown — not stated by the source
Power consumption (write)Known for one	3.1 W	Unknown — not stated by the source
Weight & dimensions4 differ
WidthDiffers	100.2 mm	22 mm
DepthDiffers	6.8 mm	80 mm
HeightDiffers	69.8 mm	4 mm
WeightDiffers	60 g	10 g
Operational conditionsidentical
Storage temperature (T-T)Known for one	-40 - 85 °C	Unknown — not stated by the source
Other features1 differ
Product colourDiffers	Black	Green
Logistics dataidentical
Harmonized System (HS) codeKnown for one	84717070	Unknown — not stated by the source

A dash means the value is not stated by the source. Unknown values are never counted for or against a product, and there is no overall score.