TEST
YOUR SSD
ADD TO PC
BUILD

Samsung

PM851 2. 128GB

▲ 500 ▼

Release date ≈ Q3 2018.

Average Bench: 30.8% (1011th of 1072)

Based on 19 user benchmarks.  Model: SAMSUNG SSD PM851 2.
Poor: 7%Average: 30.8% Great: 53%

Popular builds with this SSD

Poor average bench

The Samsung PM851 2. 128GB averaged 69.2% lower than the peak scores attained by the group leaders. This isn't a great result which indicates that there are much faster alternatives on the comparison list.

Strengths

Avg. 4K Random Read Speed 18.9MB/s
Avg. 4K Random Write Speed 34.8MB/s

Average consistency

The range of scores (95th - 5th percentile) for the Samsung PM851 2. 128GB is 45.3%. This is a relatively wide range which indicates that the Samsung PM851 2. 128GB performs inconsistently under varying real world conditions.

Weaknesses

Avg. 4K-64Thread Read Speed 33.7MB/s
Avg. Sustained Write Speed 67.5MB/s
ADVERTISEMENT

Average Bench

(Based on 19 samples)
Rank 101130.8%
Min Avg Max
7.5 Read 132 247
10.5 Write 77.4 138
8.7 Mixed 71.6 124
9.8 SusWrite 67.5 134
19.4% 87.2 MB/s
Min Avg Max
1.6 4K Read 18.9 32.1
0 4K Write 34.8 59
1.8 4K Mixed 13.9 24.6
64.8% 22.5 MB/s
Min Avg Max
1.3 DQ Read 33.7 99.9
23.2 DQ Write 65 99
3.2 DQ Mixed 21.4 28.9
24.2% 40 MB/s
User Benchmarks BenchSequentialRandom 4kDeep queue 4k
The fastest SSD (mainstream) averages a speed of 100%
91GB free (System drive)
Firmware: EXT0
SusWrite @10s intervals: 133 133 133 134 135 135 MB/s
50% Above average
Read 202
Write 127
Mixed 116
SusWrite 134
32% 145 MB/s
4K Read 27.5
4K Write 56.3
4K Mixed 23.8
102% 35.9 MB/s
DQ Read 39.5
DQ Write 95.1
DQ Mixed 21.8
30% 52.1 MB/s
87GB free (System drive)
Firmware: EXT0
SusWrite @10s intervals: 108 85 132 130 133 132 MB/s
44.1% Average
Read 213
Write 137
Mixed 110
SusWrite 120
32% 145 MB/s
4K Read 18.5
4K Write 58.5
4K Mixed 19.2
84% 32.1 MB/s
DQ Read 36.9
DQ Write 97.8
DQ Mixed 27.4
32% 54 MB/s
78GB free (System drive)
Firmware: EXT0
SusWrite @10s intervals: 77 93 85 103 104 104 MB/s
39.4% Below average
Read 128
Write 104
Mixed 90.2
SusWrite 94.3
23% 104 MB/s
4K Read 25.7
4K Write 40.3
4K Mixed 21.1
87% 29 MB/s
DQ Read 33.2
DQ Write 60.3
DQ Mixed 24.7
25% 39.4 MB/s
75GB free (System drive)
Firmware: EXT0
SusWrite @10s intervals: 118 61 105 62 91 80 MB/s
38.5% Below average
Read 189
Write 129
Mixed 108
SusWrite 86
28% 128 MB/s
4K Read 16.7
4K Write 50.6
4K Mixed 17.7
75% 28.3 MB/s
DQ Read 37.4
DQ Write 97.8
DQ Mixed 28.7
33% 54.6 MB/s
91GB free (System drive)
Firmware: EXT0
SusWrite @10s intervals: 66 60 61 60 61 57 MB/s
33% Below average
Read 126
Write 73.4
Mixed 64.8
SusWrite 60.7
18% 81.2 MB/s
4K Read 22.5
4K Write 27.2
4K Mixed 19
73% 22.9 MB/s
DQ Read 31.9
DQ Write 55.7
DQ Mixed 23.6
24% 37.1 MB/s
75GB free (System drive)
Firmware: EXT0
SusWrite @10s intervals: 101 67 81 83 121 120 MB/s
32.2% Below average
Read 175
Write 113
Mixed 104
SusWrite 95.6
27% 122 MB/s
4K Read 10.7
4K Write 31
4K Mixed 15.5
52% 19.1 MB/s
DQ Read 37
DQ Write 99
DQ Mixed 28
33% 54.7 MB/s
77GB free (System drive)
Firmware: EXT0
SusWrite @10s intervals: 85 81 78 91 103 87 MB/s
30.2% Below average
Read 140
Write 89.3
Mixed 97.2
SusWrite 87.6
23% 104 MB/s
4K Read 23.8
4K Write 26
4K Mixed 7.8
60% 19.2 MB/s
DQ Read 31
DQ Write 69.2
DQ Mixed 23.3
25% 41.2 MB/s
26GB free (System drive)
Firmware: EXT0
SusWrite @10s intervals: 17 14 13 14 13 12 MB/s
10.8% Very poor
Read 16
Write 25.5
Mixed 26.6
SusWrite 13.7
5% 20.4 MB/s
4K Read 19.6
4K Write 0
4K Mixed 3.1
34% 7.57 MB/s
19 MORE »

 Market Share (See Leaders)

The number of benchmark samples for this model as a percentage of all 75,841,456 SSDs tested

Custom PC Builder (Start a new build) Build your perfect PC: compare component prices, popularity, speed and value for money

CHOOSE A COMPONENT:

CPU GPU SSD HDD RAM MBD
Typical PM851 2. 128GB Builds (Compare 213 builds) See popular component choices, score breakdowns and rankings
Gaming
Gaming 4%
Tree trunk
Desktop
Desktop 39%
Jet ski
Workstation
Workstation 4%
Tree trunk

Motherboard: Asrock N68C-S UCC

CPU
Athlon II X2 250 (2013 D.Ri)AMDBench 40%, 19,471 samples18x
Phenom II X6 1055TAMD  $175Bench 54%, 23,835 samples17x
Athlon II X4 640AMD  $70Bench 45%, 18,839 samples17x
GPU
GeForce 7025 / nForce 630aNvidiaBench 0%, 5,527 samples20x
GeForce GT 630NvidiaBench 4%, 60,212 samples9x
Radeon HD 5450AMDBench 1%, 66,079 samples9x
SSD
PM851 2. 128GBSamsungBench 31%, 19 samples1x
RAM
2x4GBUnknownBench 39%, 424,126 samples95x
2x2GBUnknownBench 20%, 446,702 samples52x
1x4GBUnknownBench 28%, 154,807 samples17x
EDIT WITH CUSTOM PC BUILDER

Popular PM851 2. 128GB compatible motherboards:

How Fast Is Your SSD? (Bench your build) Size up your PC in less than a minute

Welcome to our PC speed test tool. UserBenchmark will test your PC and compare the results to other users with the same components. You can quickly size up your PC, identify hardware problems and explore the best value for money upgrades.

UserBenchmark of the month

Gaming Desktop ProGaming

How it works

  • - Download and run UserBenchmark
  • - CPU tests include: integer, floating and string
  • - GPU tests include: six 3D game simulations
  • - Drive tests include: read, write, sustained write and mixed IO
  • - RAM tests include: single/multi core bandwidth and latency
  • - SkillBench (space shooter) tests user input accuracy
  • - Reports are generated and presented on userbenchmark.com
  • - Identify the strongest components in your PC
  • - See speed test results from other users
  • - Compare your components to the current market leaders
  • - Explore your best upgrade options with a virtual PC build
  • - Compare your in-game FPS to other users with your hardware
Solid State Drive Rankings (Price vs Performance) May 2024 SSD Rankings

Welcome to our 2.5" and M.2 SSD comparison. We calculate effective speed for both SATA and NVMe drives based on real world performance then adjust by current prices per GB to yield a value for money rating. Our calculated values are checked against thousands of individual user ratings. The customizable table below combines these factors to bring you the definitive list of top SSDs. [SSDrivePro]

ADVERTISEMENT

Group Test Results

  • Best user rated - User sentiment trumps benchmarks for this comparison.
  • Best value for money - Value for money is based on real world performance.
  • Fastest real world speed - Real World Speed measures performance for typical consumers.

 Comments

Added n/a ago.
Your
opinion?
▲Like ▼Dislike
Ready to retire
Age: 5 years

Speed Comparisons

vs Crucial MX500 250GB
vs Samsung 850 Evo 120GB
vs Samsung 860 Evo 250GB
vs Samsung 870 Evo 250GB
vs Samsung 850 Pro 512GB
vs Samsung 850 Evo 250GB
vs HyperX Savage 240GB
vs Crucial MX300 275GB
vs Samsung 850 Evo 1TB

1072 Drives (Compared) Thousands of user benchmarks compiled into one comparison list

See how consistently different SSDs perform with varying real world conditions. The charts also illustrate overall performance, popularity and rank.

 Frequently Asked Questions

Storage Devices FAQ
What is sustained sequential write speed?
What’s the difference between SLC, MLC and TLC?
What is 3D XPoint and how fast is it?
What’s the difference between SATA, PCIe and NVMe?
What’s the difference between NAND and V-NAND?
What is sequential write speed?
What is sequential read speed?
What is incompressible data?
What is queue depth?
Solid State Drives
What is the SSD value for money rating?
What is 4K 64 thread write speed?
Can CPU power saving states (C1,C2,C3) impact SSD speed?
What is the effective SSD speed index?
How is the AS SSD write score calculated?
How is the AS SSD read score calculated?
How is the AS SSD total score calculated?
ALL FAQs »

 Best User Rated
The Best.
CPUGPUSSD
Intel Core i5-13600K $254Nvidia RTX 4060 $300Crucial MX500 250GB $39
Intel Core i5-12400F $133Nvidia RTX 4060-Ti $385Samsung 850 Evo 120GB $80
Intel Core i5-12600K $175Nvidia RTX 4070 $550Samsung 860 Evo 250GB $52
HDDRAMUSB
Seagate Barracuda 1TB (2016) $39Corsair Vengeance LPX DDR4 3200 C16 2x8GB $45SanDisk Extreme 64GB $72
WD Blue 1TB (2012) $32Corsair Vengeance LPX DDR4 3000 C15 2x8GB $45SanDisk Extreme 32GB $28
Seagate Barracuda 2TB (2016) $51G.SKILL Trident Z DDR4 3200 C14 4x16GB $351SanDisk Ultra Fit 32GB $16
If you make a purchase via one of these links, our site may earn a commission
Today's hottest
Amazon Ebay
deals
CPU GPU SSD HDD USB RAM MBD
Build Test EFps
Can You Run It?
►
YouTube
*NEW*
About  •  User Guide  •  FAQs  •  Email  •  Privacy  •  Developer  •  YouTube Feedback