Product comparison · 2 internal solid state drives

Samsung 950 PRO vs Samsung PM871 128 GB 2.5" Serial ATA III

7specifications compared
6differ
1identical
25known for one product only

Key differences

SSD capacity
- 950 PRO:256 GB
- PM871 128 GB 2.5" Serial ATA III:128 GB
SSD form factor
- 950 PRO:M.2
- PM871 128 GB 2.5" Serial ATA III:2.5"
Interface
- 950 PRO:PCI Express
- PM871 128 GB 2.5" Serial ATA III:Serial ATA III
Data transfer rate
- 950 PRO:32 Gbit/s
- PM871 128 GB 2.5" Serial ATA III:6 Gbit/s
Read speed
- 950 PRO:2200 MB/s
- PM871 128 GB 2.5" Serial ATA III:540 MB/s
Write speed
- 950 PRO:900 MB/s
- PM871 128 GB 2.5" Serial ATA III:140 MB/s

Side by side

Differences highlightedShow differences only

Comparison of 950 PRO, PM871
32 specifications	A Samsung 950 PRO View product	B Samsung PM871 128 GB 2.5" Serial ATA III Model PM871 View product
Features6 differ
SSD capacityDiffers	256 GB	128 GB
SSD form factorDiffers	M.2	2.5"
InterfaceDiffers	PCI Express	Serial ATA III
Security algorithmsKnown for one	256-bit AES	Unknown — not stated by the source
Data transfer rateDiffers	32 Gbit/s	6 Gbit/s
Read speedDiffers	2200 MB/s	540 MB/s
Write speedDiffers	900 MB/s	140 MB/s
Random read (4KB)Known for one	270000 IOPS	Unknown — not stated by the source
Random write (4KB)Known for one	85000 IOPS	Unknown — not stated by the source
Storage drive buffer sizeKnown for one	512 MB	Unknown — not stated by the source
PCI Express interface data lanesKnown for one	x4	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
TBW ratingKnown for one	200	Unknown — not stated by the source
Poweridentical
Power consumption (read)Known for one	5.1 W	Unknown — not stated by the source
Power consumption (write)Known for one	5.1 W	Unknown — not stated by the source
Power consumption (sleep)Known for one	0.0025 W	Unknown — not stated by the source
Power consumption (idle)Known for one	0.07 W	Unknown — not stated by the source
Weight & dimensionsidentical
WidthKnown for one	80.2 mm	Unknown — not stated by the source
DepthKnown for one	22.1 mm	Unknown — not stated by the source
HeightKnown for one	2.38 mm	Unknown — not stated by the source
WeightKnown for one	10 g	Unknown — not stated by the source
Operational conditionsidentical
Operating temperature (T-T)Known for one	0 - 70 °C	Unknown — not stated by the source
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)Known for one	5 - 95%	Unknown — not stated by the source
Operating vibrationKnown for one	20 G	Unknown — not stated by the source
Operating shockKnown for one	1500 G	Unknown — not stated by the source
Other featuresidentical
Product colourKnown for one	Black	Unknown — not stated by the source
Internal	Yes	Yes
Connector(s)Known for one	Unknown — not stated by the source	SFF-8223

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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