Nvme

PM991 Samsung 128GB

PM991 Samsung 128GB
BENCHMARKS (7)
MKT (0%)
BUILDS
(0)

Effective Speed +21% Effective Speed 21%Average Score +16% Read 132%, Write 11%, 4K Read 5%, 4K Write 5%, Mixed 41%, 4K Mixed 4%, SusWrite -86%Peak Score +49% Read 183%, Write 91%, 4K Read 14%, 4K Write 2%, Mixed 121%, 4K Mixed 14%, SusWrite -79%Value & Sentiment User Rating -13%, Market Share -∞%Nice To Haves +63% DQ Read 38%, DQ Write 107%, DQ Mixed 71%, ADQ Read 16%, ADQ Write 18%, ADQ Mixed 25%, Age 163%, AS-SSD Total 62%

Average Bench: 119% (192^nd of 1072)

Based on 7 user benchmarks. Model: NVMe PM991 NVMe Samsung 128GB

Poor: 84%Average: 119% Great: 162%

Popular builds with this SSD

Outstanding average bench

The Nvme PM991 Samsung 128GB averaged 18.7% higher than the peak scores attained by the group leaders. This is an excellent result which ranks the Nvme PM991 Samsung 128GB near the top of the comparison list.

Strengths

Avg. 4K-64Thread Mixed IO Speed 326MB/s

Avg. Sequential Read Speed 1,062MB/s

See where your SSD ranks →

Very poor consistency

The range of scores (95th - 5th percentile) for the Nvme PM991 Samsung 128GB is 78%. This is a particularly wide range which indicates that the Nvme PM991 Samsung 128GB performs inconsistently under varying real world conditions.

Weaknesses

Avg. Sustained Write Speed 159MB/s

Avg. Sequential Write Speed 448MB/s

Average Bench

(Based on 7 samples)

Rank 192119%

Min	Avg	Max
725	Read 1,062	1,432
120	Write 448	924
198	Mixed 506	937
106	SusWrite 159	216
120% 544 MB/s

Min	Avg	Max
14.1	4K Read 35.9	48.9
73.9	4K Write 92.2	125
34.1	4K Mixed 46.7	66.4
163% 58.3 MB/s

Min	Avg	Max
272	DQ Read 377	507
94.4	DQ Write 342	742
166	DQ Mixed 326	566
254% 348 MB/s

User Benchmarks

Bench

Sequential

Random 4k

Deep queue 4k

The fastest SSD (mainstream) averages a speed of 100%

CAN-User, 2 years ago.

79GB free (System drive)

Firmware: 25307039 Max speed: PCIe 5,000 MB/s

SusWrite @10s intervals: 307 165 186 179 179 183 MB/s

162% Outstanding

Write 924

Mixed 904

SusWrite 200

192% 865 MB/s

4K Read 47.9

4K Write 110

4K Mixed 61.1

209% 73.2 MB/s

DQ Read 507

DQ Write 742

DQ Mixed 566

444% 605 MB/s

AUS-User, 15 months ago.

80GB free (System drive)

Firmware: 25311039 Max speed: PCIe 5,000 MB/s

SusWrite @10s intervals: 293 181 187 182 182 190 MB/s

162% Outstanding

Write 871

Mixed 937

SusWrite 202

186% 839 MB/s

4K Read 48.9

4K Write 125

4K Mixed 66.4

225% 80.1 MB/s

DQ Read 505

DQ Write 653

DQ Mixed 562

429% 573 MB/s

AUS-User, 15 months ago.

75GB free (System drive)

Firmware: 25311039 Max speed: PCIe 5,000 MB/s

SusWrite @10s intervals: 344 183 192 191 192 191 MB/s

142% Outstanding

Write 816

Mixed 844

SusWrite 216

177% 799 MB/s

4K Read 42.5

4K Write 74.4

4K Mixed 55.9

175% 57.6 MB/s

DQ Read 496

DQ Write 466

DQ Mixed 462

352% 475 MB/s

CAN-User, 22 months ago.

69GB free (System drive)

Firmware: 25307039 Max speed: PCIe 5,000 MB/s

SusWrite @10s intervals: 125 134 132 131 130 124 MB/s

96% Outstanding

Write 120

Mixed 207

SusWrite 129

82% 381 MB/s

4K Read 14.1

4K Write 85.5

4K Mixed 35.6

112% 45.1 MB/s

DQ Read 272

DQ Write 177

DQ Mixed 169

141% 206 MB/s

OMN-User, 19 months ago.

42GB free (System drive)

Firmware: 25307039 Max speed: PCIe 5,000 MB/s

SusWrite @10s intervals: 133 65 92 113 116 117 MB/s

94.1% Outstanding

Write 129

Mixed 198

SusWrite 106

65% 300 MB/s

4K Read 35.6

4K Write 98.7

4K Mixed 39.3

157% 57.9 MB/s

DQ Read 287

DQ Write 125

DQ Mixed 166

134% 193 MB/s

ECU-User, 13 months ago.

62GB free (System drive)

Firmware: 25306039 Max speed: PCIe 5,000 MB/s

SusWrite @10s intervals: 146 139 145 137 149 150 MB/s

90.2% Outstanding

Write 140

Mixed 229

SusWrite 144

70% 322 MB/s

4K Read 32

4K Write 77.3

4K Mixed 34.8

134% 48 MB/s

DQ Read 286

DQ Write 135

DQ Mixed 171

138% 198 MB/s

USA-User, 10 months ago.

71GB free (System drive)

Firmware: 25307039 Max speed: PCIe 5,000 MB/s

SusWrite @10s intervals: 119 132 104 118 114 119 MB/s

84.2% Excellent

Write 138

Mixed 221

SusWrite 118

65% 300 MB/s

4K Read 30.5

4K Write 73.9

4K Mixed 34.1

129% 46.2 MB/s

DQ Read 284

DQ Write 94.4

DQ Mixed 189

140% 189 MB/s

Market Share (See Leaders)

The number of benchmark samples for this model as a percentage of all 73,438,433 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 PM991 Samsung 128GB Builds (Compare 1,903 builds) See popular component choices, score breakdowns and rankings

Gaming 7%

Tree trunk

Desktop 58%

Gunboat

Workstation 7%

Tree trunk

System: Dell Latitude 5400

CPU
Core i5-8365UIntelBench 57%, 8,737 samples	802x
Core i7-8665UIntelBench 60%, 10,156 samples	633x
Core i5-8265UIntelBench 53%, 87,841 samples	378x

GPU
UHD Graphics 620IntelBench 5%, 178,291 samples	1,813x
UHD Graphics 620 (Mobile Kaby Lake R)IntelBench 5%, 420,154 samples	82x
GTX 1660-TiNvidia $280Bench 76%, 318,562 samples	2x

SSD
PM991 Samsung 128GBNvmeBench 119%, 7 samples	1x

RAM
HMA81GS6JJR8N-VK 1x8GBUnknownBench 40%, 7,726 samples	180x
HMA82GS6JJR8N-VK 1x16GBUnknownBench 43%, 5,210 samples	174x
HMA82GS6DJR8N-VK 1x16GBUnknownBench 42%, 1,772 samples	161x

EDIT WITH CUSTOM PC BUILDER

Popular PM991 Samsung 128GB systems:

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

Welcome to our freeware 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 upgrades.

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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) December 2023 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]

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.

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 »

CPU	GPU	SSD
Intel Core i5-13600K $270	Nvidia RTX 4060 $295	Crucial MX500 250GB $30
Intel Core i5-12400F $146	Nvidia RTX 4060-Ti $360	Samsung 850 Evo 120GB $80
Intel Core i5-12600K $189	Nvidia RTX 3060-Ti $340	Samsung 860 Evo 250GB $49

HDD	RAM	USB
Seagate Barracuda 1TB (2016) $40	Corsair Vengeance LPX DDR4 3200 C16 2x8GB $42	SanDisk Extreme 64GB $72
WD Blue 1TB (2012) $30	Corsair Vengeance LPX DDR4 3000 C15 2x8GB $43	SanDisk Extreme 32GB $28
Seagate Barracuda 2TB (2016) $50	G.SKILL Trident Z DDR4 3200 C14 4x16GB $357	SanDisk Ultra Fit 32GB $16

Nvme

PM991 Samsung 128GB

Average Bench: 119% (192^nd of 1072)

Popular builds with this SSD

Outstanding average bench

Strengths

Very poor consistency

Weaknesses

Average Bench

Market Share (See Leaders)

CHOOSE A COMPONENT:

System: Dell Latitude 5400

Popular PM991 Samsung 128GB systems:

UserBenchmark of the month

How it works

Group Test Results

Comments

Speed Comparisons

Frequently Asked Questions

Best User Rated

Nvme

PM991 Samsung 128GB

Average Bench: 119% (192nd of 1072)

Popular builds with this SSD

Outstanding average bench

Strengths

Very poor consistency

Weaknesses

Average Bench

Market Share (See Leaders)

CHOOSE A COMPONENT:

System: Dell Latitude 5400

Popular PM991 Samsung 128GB systems:

UserBenchmark of the month

How it works

Group Test Results

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Comments

Speed Comparisons

Frequently Asked Questions

Best User Rated

Feedback

Average Bench: 119% (192^nd of 1072)