Nvme

PM991 Samsu 256GB

PM991 Samsu 256GB
BENCHMARKS (436)
MKT (0%)
BUILDS
(0)

Effective Speed +19% Effective Speed 19%Average Score +22% Read 109%, Write 26%, 4K Read 3%, 4K Write 4%, Mixed 46%, 4K Mixed -2%, SusWrite -30%Peak Score +62% Read 164%, Write 96%, 4K Read 18%, 4K Write 5%, Mixed 129%, 4K Mixed 16%, SusWrite 7%Value & Sentiment -868%User Rating -14%, Market Share -1,722%Nice To Haves +55% DQ Read 31%, DQ Write 131%, DQ Mixed 68%, ADQ Read 8%, ADQ Write 24%, ADQ Mixed 31%, Age 81%, AS-SSD Total 66%

Average Bench: 117% (194^th of 1072)

Based on 436 user benchmarks. Model: NVMe PM991 NVMe Samsu

Poor: 71%Average: 117% Great: 172%

Popular builds with this SSD

Outstanding average bench

The Nvme PM991 Samsu 256GB averaged 16.8% higher than the peak scores attained by the group leaders. This is an excellent result which ranks the Nvme PM991 Samsu 256GB near the top of the comparison list.

Strengths

Avg. 4K-64Thread Mixed IO Speed 341MB/s

Avg. Sequential Read Speed 958MB/s

See where your SSD ranks →

Terrible consistency

The range of scores (95th - 5th percentile) for the Nvme PM991 Samsu 256GB is 101%. This is a particularly wide range which indicates that the Nvme PM991 Samsu 256GB performs inconsistently under varying real world conditions.

Weaknesses

Avg. Sustained Write Speed 228MB/s

Avg. Sequential Write Speed 512MB/s

Average Bench

(Based on 436 samples)

Rank 194117%

Min	Avg	Max
600	Read 958	1,339
94.8	Write 512	951
161	Mixed 525	971
91	SusWrite 228	416
123% 556 MB/s

Min	Avg	Max
18.8	4K Read 35.3	50.6
50.8	4K Write 90.7	128
23.7	4K Mixed 44.3	67.8
158% 56.7 MB/s

Min	Avg	Max
194	DQ Read 352	482
92.4	DQ Write 357	828
125	DQ Mixed 341	555
260% 350 MB/s

User Benchmarks

Bench

Sequential

Random 4k

Deep queue 4k

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

FRA-User, 29 days ago.

180GB free (System drive)

Firmware: 25305039 Max speed: PCIe 16,000 MB/s

SusWrite @10s intervals: 589 502 171 158 160 152 MB/s

125% Outstanding

Write 791

Mixed 746

SusWrite 289

157% 701 MB/s

4K Read 35.6

4K Write 93.7

4K Mixed 47.3

164% 58.9 MB/s

DQ Read 481

DQ Write 311

DQ Mixed 443

318% 412 MB/s

USA-User, 1 month ago.

35GB free (System drive)

Firmware: 25307039 Max speed: PCIe 16,000 MB/s

SusWrite @10s intervals: 124 122 116 113 116 89 MB/s

101% Outstanding

Write 168

Mixed 205

SusWrite 113

78% 363 MB/s

4K Read 30.7

4K Write 107

4K Mixed 39.3

154% 59.1 MB/s

DQ Read 249

DQ Write 134

DQ Mixed 160

128% 181 MB/s

EGY-User, 18 days ago.

32GB free (System drive)

Firmware: 25311039 Max speed: PCIe 16,000 MB/s

SusWrite @10s intervals: 116 114 112 102 97 93 MB/s

98.5% Outstanding

Write 151

Mixed 181

SusWrite 106

78% 361 MB/s

4K Read 33.2

4K Write 83.6

4K Mixed 37

142% 51.3 MB/s

DQ Read 249

DQ Write 122

DQ Mixed 174

132% 182 MB/s

USA-User, 1 month ago.

70GB free (System drive)

Firmware: 25311039 Max speed: PCIe 16,000 MB/s

SusWrite @10s intervals: 130 120 119 115 107 98 MB/s

85.4% Excellent

Write 135

Mixed 202

SusWrite 115

72% 332 MB/s

4K Read 26.2

4K Write 64.4

4K Mixed 30.6

113% 40.4 MB/s

DQ Read 247

DQ Write 136

DQ Mixed 143

120% 175 MB/s

GBR-User, 2 months ago.

34GB free (System drive)

Firmware: 25305039 Max speed: PCIe 16,000 MB/s

SusWrite @10s intervals: 65 59 60 60 60 59 MB/s

74.2% Very good

Write 72.4

Mixed 128

SusWrite 60.4

59% 276 MB/s

4K Read 20.1

4K Write 67

4K Mixed 24.9

98% 37.3 MB/s

DQ Read 245

DQ Write 65.3

DQ Mixed 112

94% 141 MB/s

AUS-User, 1 month ago.

198GB free (System drive)

Firmware: 25311039 Max speed: PCIe 16,000 MB/s

SusWrite @10s intervals: 591 613 242 161 178 157 MB/s

62.8% Good

Write 609

Mixed 606

SusWrite 324

124% 550 MB/s

4K Read 12.7

4K Write 13.9

4K Mixed 13

43% 13.2 MB/s

DQ Read 77.2

DQ Write 60.8

DQ Mixed 68.6

51% 68.9 MB/s

QAT-User, 6 days ago.

88GB free (System drive)

Firmware: 25311039 Max speed: PCIe 16,000 MB/s

SusWrite @10s intervals: 119 117 107 108 112 89 MB/s

57.9% Above average

Write 132

Mixed 209

SusWrite 109

55% 251 MB/s

4K Read 15.6

4K Write 33.3

4K Mixed 19.9

67% 22.9 MB/s

DQ Read 230

DQ Write 142

DQ Mixed 168

130% 180 MB/s

436 MORE »

Market Share (See Leaders)

The number of benchmark samples for this model as a percentage of all 75,697,039 SSDs tested

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

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CPU

GPU

SSD

HDD

RAM

MBD

Typical PM991 Samsu 256GB Builds (Compare 2,558 builds) See popular component choices, score breakdowns and rankings

Gaming 9%

Tree trunk

Desktop 78%

Battleship

Workstation 9%

Tree trunk

Motherboard: Dell OptiPlex 3070

CPU
Core i5-9500IntelBench 87%, 9,059 samples	1,007x
Core i5-9500TIntelBench 77%, 2,730 samples	495x
Core i3-9100TIntelBench 75%, 1,165 samples	324x

GPU
UHD Graphics 630 (Desktop Coffee Lake i5 i7)IntelBench 5%, 147,588 samples	1,452x
UHD Graphics 630 (Desktop Coffee Lake i3)IntelBench 5%, 32,403 samples	531x
UHD Graphics 630IntelBench 5%, 65,338 samples	140x

SSD
PM991 Samsu 256GBNvmeBench 117%, 436 samples	1x

RAM
8ATF1G64AZ-2G6E1 1x8GBUnknownBench 44%, 3,962 samples	132x
HMA81GU6JJR8N-VK 1x8GBUnknownBench 44%, 2,734 samples	131x
HMA81GS6JJR8N-VK 1x8GBUnknownBench 40%, 7,726 samples	69x

EDIT WITH CUSTOM PC BUILDER

Popular PM991 Samsu 256GB 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.

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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
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Solid State Drive Rankings (Price vs Performance) April 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]

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 $273	Nvidia RTX 4060 $295	Crucial MX500 250GB $40
Intel Core i5-12400F $133	Nvidia RTX 4060-Ti $385	Samsung 850 Evo 120GB $80
Intel Core i5-12600K $15	Nvidia RTX 4070 $539	Samsung 860 Evo 250GB $52

HDD	RAM	USB
Seagate Barracuda 1TB (2016) $39	Corsair Vengeance LPX DDR4 3200 C16 2x8GB $45	SanDisk Extreme 64GB $72
WD Blue 1TB (2012) $37	Corsair Vengeance LPX DDR4 3000 C15 2x8GB $43	SanDisk Extreme 32GB $28
Seagate Barracuda 2TB (2016) $51	G.SKILL Trident Z DDR4 3200 C14 4x16GB $351	SanDisk Ultra Fit 32GB $16

Nvme

PM991 Samsu 256GB

Average Bench: 117% (194^th of 1072)

Popular builds with this SSD

Outstanding average bench

Strengths

Terrible consistency

Weaknesses

Average Bench

Market Share (See Leaders)

CHOOSE A COMPONENT:

Motherboard: Dell OptiPlex 3070

Popular PM991 Samsu 256GB compatible motherboards:

UserBenchmark of the month

How it works

Group Test Results

Comments

Speed Comparisons

Frequently Asked Questions

Best User Rated

Nvme

PM991 Samsu 256GB

Average Bench: 117% (194th of 1072)

Popular builds with this SSD

Outstanding average bench

Strengths

Terrible consistency

Weaknesses

Average Bench

Market Share (See Leaders)

CHOOSE A COMPONENT:

Motherboard: Dell OptiPlex 3070

Popular PM991 Samsu 256GB compatible motherboards:

UserBenchmark of the month

How it works

Group Test Results

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Comments

Speed Comparisons

Frequently Asked Questions

Best User Rated

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Average Bench: 117% (194^th of 1072)