Nvme

PM991 Samsung 512GB

PM991 Samsung 512GB
BENCHMARKS (255)
MKT (0%)
BUILDS
(0)

Effective Speed +27% Effective Speed 27%Average Score +31% Read 117%, Write 42%, 4K Read -1%, 4K Write -5%, Mixed 62%, 4K Mixed -5%, SusWrite 11%Peak Score +73% Read 155%, Write 124%, 4K Read 14%, 4K Write 4%, Mixed 147%, 4K Mixed 12%, SusWrite 52%Value & Sentiment User Rating -14%, Market Share -∞%Nice To Haves +81% DQ Read 146%, DQ Write 37%, DQ Mixed 125%, ADQ Read 81%, ADQ Write -14%, ADQ Mixed 56%, Age 129%, AS-SSD Total 91%

Average Bench: 125% (185^th of 1072)

Based on 255 user benchmarks. Model: NVMe PM991 NVMe Samsung 512GB

Poor: 77%Average: 125% Great: 180%

Popular builds with this SSD

Outstanding average bench

The Nvme PM991 Samsung 512GB averaged 25.0% higher than the peak scores attained by the group leaders. This is an excellent result which ranks the Nvme PM991 Samsung 512GB near the top of the comparison list.

Strengths

Avg. 4K-64Thread Mixed IO Speed 407MB/s

Avg. 4K-64Thread Read Speed 591MB/s

See where your SSD ranks →

Terrible consistency

The range of scores (95th - 5th percentile) for the Nvme PM991 Samsung 512GB is 103%. This is a particularly wide range which indicates that the Nvme PM991 Samsung 512GB performs inconsistently under varying real world conditions.

Weaknesses

Avg. Sustained Write Speed 329MB/s

Avg. 4K-64Thread Write Speed 254MB/s

Average Bench

(Based on 255 samples)

Rank 185125%

Min	Avg	Max
662	Read 991	1,294
110	Write 574	1,087
176	Mixed 581	1,046
95.9	SusWrite 329	587
137% 619 MB/s

Min	Avg	Max
18.5	4K Read 33.9	48.8
45.8	4K Write 83.4	127
25.4	4K Mixed 42.8	65.3
150% 53.4 MB/s

Min	Avg	Max
282	DQ Read 591	904
86.6	DQ Write 254	491
141	DQ Mixed 407	745
306% 417 MB/s

User Benchmarks

Bench

Sequential

Random 4k

Deep queue 4k

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

IND-User, 3 months ago.

212GB free (System drive)

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

SusWrite @10s intervals: 155 154 155 152 144 139 MB/s

113% Outstanding

Write 152

Mixed 307

SusWrite 150

92% 424 MB/s

4K Read 33.4

4K Write 95.3

4K Mixed 40.9

154% 56.5 MB/s

DQ Read 457

DQ Write 147

DQ Mixed 232

190% 279 MB/s

HKG-User, 4 months ago.

184GB free (System drive)

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

SusWrite @10s intervals: 177 178 178 170 124 117 MB/s

97.3% Outstanding

Write 208

Mixed 316

SusWrite 157

88% 406 MB/s

4K Read 28.8

4K Write 60.5

4K Mixed 33.5

119% 40.9 MB/s

DQ Read 435

DQ Write 172

DQ Mixed 202

176% 269 MB/s

HKG-User, 4 months ago.

184GB free (System drive)

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

SusWrite @10s intervals: 210 187 182 181 157 113 MB/s

95.4% Outstanding

Write 280

Mixed 342

SusWrite 172

89% 405 MB/s

4K Read 28.5

4K Write 77.6

4K Mixed 35.7

130% 47.3 MB/s

DQ Read 431

DQ Write 105

DQ Mixed 336

230% 291 MB/s

USA-User, 3 months ago.

116GB free (System drive)

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

SusWrite @10s intervals: 117 107 108 102 98 86 MB/s

85.1% Excellent

Write 113

Mixed 197

SusWrite 103

66% 309 MB/s

4K Read 24.6

4K Write 65.5

4K Mixed 28.4

108% 39.5 MB/s

DQ Read 466

DQ Write 106

DQ Mixed 214

176% 262 MB/s

AUS-User, 1 month ago.

42GB free (System drive)

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

SusWrite @10s intervals: 157 171 174 174 167 156 MB/s

83.3% Excellent

Write 164

Mixed 266

SusWrite 167

80% 371 MB/s

4K Read 15.7

4K Write 72.1

4K Mixed 17.4

84% 35.1 MB/s

DQ Read 462

DQ Write 104

DQ Mixed 223

179% 263 MB/s

CAN-User, 3 months ago.

230GB free (System drive)

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

SusWrite @10s intervals: 155 158 160 118 142 131 MB/s

78.2% Very good

Write 142

Mixed 182

SusWrite 144

65% 299 MB/s

4K Read 25.2

4K Write 57.9

4K Mixed 25.5

102% 36.2 MB/s

DQ Read 251

DQ Write 167

DQ Mixed 184

144% 201 MB/s

TUR-User, 4 months ago.

132GB free (System drive)

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

SusWrite @10s intervals: 135 117 125 116 111 118 MB/s

78% Very good

Write 119

Mixed 175

SusWrite 120

56% 258 MB/s

4K Read 25.7

4K Write 67.8

4K Mixed 28

111% 40.5 MB/s

DQ Read 463

DQ Write 85.5

DQ Mixed 187

159% 245 MB/s

255 MORE »

Market Share (See Leaders)

The number of benchmark samples for this model as a percentage of all 75,713,417 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 Samsung 512GB Builds (Compare 906 builds) See popular component choices, score breakdowns and rankings

Gaming 14%

Tree trunk

Desktop 73%

Battleship

Workstation 12%

Tree trunk

System: Dell Inspiron 5406 2n1

CPU
Core i7-1165G7IntelBench 66%, 51,565 samples	417x
Core i5-1135G7IntelBench 69%, 36,962 samples	397x
Core i3-1115G4IntelBench 51%, 18,815 samples	91x

GPU
Iris XeIntelBench 14%, 144,774 samples	778x
UHD GraphicsIntelBench 9%, 39,662 samples	91x
GeForce MX330NvidiaBench 14%, 4,518 samples	37x

SSD
PM991 Samsung 512GBNvmeBench 125%, 255 samples	1x

RAM
M471A1K43DB1-CWE 1x8GBSamsungBench 45%, 34,565 samples	84x
HMAA1GS6CJR6N-XN 1x8GBUnknownBench 32%, 13,137 samples	73x
KKRVFX-MIE 1x8GBUnknownBench 38%, 1,686 samples	51x

EDIT WITH CUSTOM PC BUILDER

Popular PM991 Samsung 512GB systems:

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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- 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
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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 $300	Crucial MX500 250GB $40
Intel Core i5-12400F $133	Nvidia RTX 4060-Ti $385	Samsung 850 Evo 120GB $80
Intel Core i5-12600K $177	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 Samsung 512GB

Average Bench: 125% (185^th of 1072)

Popular builds with this SSD

Outstanding average bench

Strengths

Terrible consistency

Weaknesses

Average Bench

Market Share (See Leaders)

CHOOSE A COMPONENT:

System: Dell Inspiron 5406 2n1

Popular PM991 Samsung 512GB systems:

UserBenchmark of the month

How it works

Group Test Results

Comments

Speed Comparisons

Frequently Asked Questions

Best User Rated

Nvme

PM991 Samsung 512GB

Average Bench: 125% (185th of 1072)

Popular builds with this SSD

Outstanding average bench

Strengths

Terrible consistency

Weaknesses

Average Bench

Market Share (See Leaders)

CHOOSE A COMPONENT:

System: Dell Inspiron 5406 2n1

Popular PM991 Samsung 512GB systems:

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: 125% (185^th of 1072)