Product comparison · 2 internal solid state drives

Samsung 850 EVO vs Samsung SM951 128 GB M.2 PCI Express 3.0

13specifications compared
9differ
4identical
19known for one product only

Key differences

SSD capacity
- 850 EVO:120 GB
- SM951 128 GB M.2 PCI Express 3.0:128 GB
SSD form factor
- 850 EVO:2.5"
- SM951 128 GB M.2 PCI Express 3.0:M.2
Interface
- 850 EVO:Serial ATA III
- SM951 128 GB M.2 PCI Express 3.0:PCI Express 3.0
Read speed
- 850 EVO:540 MB/s
- SM951 128 GB M.2 PCI Express 3.0:2000 MB/s
Write speed
- 850 EVO:520 MB/s
- SM951 128 GB M.2 PCI Express 3.0:650 MB/s
Width
- 850 EVO:69.8 mm
- SM951 128 GB M.2 PCI Express 3.0:22 mm
Depth
- 850 EVO:100 mm
- SM951 128 GB M.2 PCI Express 3.0:80 mm
Height
- 850 EVO:6.8 mm
- SM951 128 GB M.2 PCI Express 3.0:4 mm

Side by side

Differences highlightedShow differences only

Comparison of 850 EVO, SM951
32 specifications	A Samsung 850 EVO View product	B Samsung SM951 128 GB M.2 PCI Express 3.0 Model SM951 View product
Features5 differ
SSD capacityDiffers	120 GB	128 GB
SSD form factorDiffers	2.5"	M.2
InterfaceDiffers	Serial ATA III	PCI Express 3.0
Memory typeKnown for one	MLC	Unknown — not stated by the source
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	540 MB/s	2000 MB/s
Write speedDiffers	520 MB/s	650 MB/s
Random read (4KB)Known for one	94000 IOPS	Unknown — not stated by the source
Random write (4KB)Known for one	36000 IOPS	Unknown — not stated by the source
Storage drive buffer sizeKnown for one	256 MB	Unknown — not stated by the source
S.M.A.R.T. supportKnown for one	Yes	Unknown — not stated by the source
TRIM supportKnown for one	Yes	Unknown — not stated by the source
Mean time between failures (MTBF)Known for one	1500000 h	Unknown — not stated by the source
Windows operating systems supportedKnown for one	Yes	Unknown — not stated by the source
PCI Express interface data lanesKnown for one	Unknown — not stated by the source	x4
Poweridentical
Power consumption (read)Known for one	0.1 W	Unknown — not stated by the source
Power consumption (write)Known for one	0.1 W	Unknown — not stated by the source
Power consumption (idle)Known for one	0.045 W	Unknown — not stated by the source
Weight & dimensions3 differ
WidthDiffers	69.8 mm	22 mm
DepthDiffers	100 mm	80 mm
HeightDiffers	6.8 mm	4 mm
WeightKnown for one	Unknown — not stated by the source	10 g
Operational conditionsidentical
Operating temperature (T-T)	0 - 70 °C	0 - 70 °C
Storage temperature (T-T)Known for one	-40 - 85 °C	Unknown — not stated by the source
Operating relative humidity (H-H)Known for one	5 - 95%	Unknown — not stated by the source
Storage relative humidity (H-H)	5 - 95%	5 - 95%
Non-operating vibrationKnown for one	20 G	Unknown — not stated by the source
Operating shock	1500 G	1500 G
Non-operating shockKnown for one	1500 G	Unknown — not stated by the source
Other features1 differ
Product colourDiffers	Black	Green
Internal	Yes	Yes

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.

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