Nvme

PM991 Samsu 512GB

PM991 Samsu 512GB
BENCHMARKS (297)
MKT (0%)
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Effective Speed +40% Effective Speed 40%Average Score +49% Read 131%, Write 78%, 4K Read 19%, 4K Write -4%, Mixed 90%, 4K Mixed 2%, SusWrite 30%Peak Score +90% Read 177%, Write 169%, 4K Read 18%, 4K Write 6%, Mixed 183%, 4K Mixed 20%, SusWrite 61%Value & Sentiment User Rating -14%, Market Share -∞%Nice To Haves +96% DQ Read 145%, DQ Write 131%, DQ Mixed 122%, ADQ Read 81%, ADQ Write 22%, ADQ Mixed 65%, Age 81%, AS-SSD Total 121%

Average Bench: 138% (171^st of 1072)

Based on 297 user benchmarks. Model: NVMe PM991 NVMe Samsu

Poor: 82%Average: 138% Great: 201%

Popular builds with this SSD

Outstanding average bench

The Nvme PM991 Samsu 512GB averaged 37.6% higher than the peak scores attained by the group leaders. This is an excellent result which ranks the Nvme PM991 Samsu 512GB near the top of the comparison list.

Strengths

Avg. 4K-64Thread Mixed IO Speed 430MB/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 Samsu 512GB is 120%. This is a particularly wide range which indicates that the Nvme PM991 Samsu 512GB performs inconsistently under varying real world conditions.

Weaknesses

Avg. Sustained Write Speed 386MB/s

Avg. 4K Random Write Speed 84.3MB/s

Average Bench

(Based on 297 samples)

Rank 171138%

Min	Avg	Max
676	Read 1,057	1,405
133	Write 720	1,304
197	Mixed 681	1,197
104	SusWrite 386	622
158% 711 MB/s

Min	Avg	Max
20.2	4K Read 41	50.5
29.9	4K Write 84.3	130
22.3	4K Mixed 45.9	69.9
165% 57 MB/s

Min	Avg	Max
251	DQ Read 591	899
95.1	DQ Write 351	828
122	DQ Mixed 430	734
331% 457 MB/s

User Benchmarks

Bench

Sequential

Random 4k

Deep queue 4k

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

GBR-User, 3 months ago.

438GB free (System drive)

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

SusWrite @10s intervals: 1302 1049 301 317 314 313 MB/s

176% Outstanding

Write 1346

Mixed 1,192

SusWrite 599

250% 1,114 MB/s

4K Read 38.7

4K Write 87.2

4K Mixed 52.7

172% 59.5 MB/s

DQ Read 816

DQ Write 686

DQ Mixed 717

546% 740 MB/s

GBR-User, 3 months ago.

414GB free (System drive)

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

SusWrite @10s intervals: 1221 1071 324 330 325 302 MB/s

174% Outstanding

Write 1,293

Mixed 1166

SusWrite 596

244% 1,086 MB/s

4K Read 38.8

4K Write 86.3

4K Mixed 52.5

172% 59.2 MB/s

DQ Read 825

DQ Write 657

DQ Mixed 697

533% 726 MB/s

IRN-User, 4 days ago.

400GB free (System drive)

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

SusWrite @10s intervals: 721 848 741 321 278 298 MB/s

164% Outstanding

Write 1,082

Mixed 986

SusWrite 534

213% 950 MB/s

4K Read 42

4K Write 98.2

4K Mixed 55.7

187% 65.3 MB/s

DQ Read 794

DQ Write 324

DQ Mixed 541

405% 553 MB/s

EGY-User, 4 months ago.

330GB free (System drive)

Firmware: 25304039 Max speed: PCIe 16,000 MB/s

SusWrite @10s intervals: 1158 1127 327 327 311 287 MB/s

159% Outstanding

Write 1,185

Mixed 933

SusWrite 589

212% 945 MB/s

4K Read 37.5

4K Write 79.5

4K Mixed 50.8

164% 55.9 MB/s

DQ Read 734

DQ Write 582

DQ Mixed 630

479% 649 MB/s

TUR-User, 3 months ago.

195GB free (System drive)

Firmware: 25306039 Max speed: PCIe 16,000 MB/s

SusWrite @10s intervals: 215 240 215 227 203 116 MB/s

106% Outstanding

Write 205

Mixed 223

SusWrite 203

87% 400 MB/s

4K Read 29.2

4K Write 75.1

4K Mixed 36.7

131% 47 MB/s

DQ Read 457

DQ Write 186

DQ Mixed 193

177% 279 MB/s

GBR-User, 3 months ago.

456GB free (System drive)

Firmware: 1039 Max speed: PCIe 16,000 MB/s

SusWrite @10s intervals: 418 424 395 428 410 407 MB/s

92.4% Outstanding

Write 706

Mixed 647

SusWrite 414

138% 612 MB/s

4K Read 15.9

4K Write 30.2

4K Mixed 22.8

69% 23 MB/s

DQ Read 476

DQ Write 341

DQ Mixed 386

295% 401 MB/s

PHL-User, 1 month ago.

68GB free (System drive)

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

SusWrite @10s intervals: 171 131 122 85 88 79 MB/s

82.2% Excellent

Write 138

Mixed 257

SusWrite 113

70% 324 MB/s

4K Read 24.2

4K Write 38.7

4K Mixed 31

97% 31.3 MB/s

DQ Read 466

DQ Write 134

DQ Mixed 256

200% 285 MB/s

IND-User, 1 month ago.

204GB free (System drive)

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

SusWrite @10s intervals: 160 127 124 90 95 95 MB/s

81.8% Excellent

Write 183

Mixed 246

SusWrite 115

77% 357 MB/s

4K Read 18.1

4K Write 52.6

4K Mixed 25.1

87% 31.9 MB/s

DQ Read 412

DQ Write 139

DQ Mixed 252

192% 268 MB/s

297 MORE »

Market Share (See Leaders)

The number of benchmark samples for this model as a percentage of all 75,732,898 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 Samsu 512GB Builds (Compare 2,135 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	926x
Core i7-8665UIntelBench 60%, 10,156 samples	699x
Core i5-8265UIntelBench 53%, 87,841 samples	411x

GPU
UHD Graphics 620IntelBench 5%, 178,291 samples	2,036x
UHD Graphics 620 (Mobile Kaby Lake R)IntelBench 5%, 420,154 samples	90x
GTX 1660-TiNvidia $143Bench 76%, 318,562 samples	2x

SSD
PM991 Samsu 512GBNvmeBench 138%, 297 samples	1x

RAM
HMA81GS6JJR8N-VK 1x8GBUnknownBench 40%, 7,726 samples	195x
HMA82GS6JJR8N-VK 1x16GBUnknownBench 43%, 5,210 samples	192x
HMA82GS6DJR8N-VK 1x16GBUnknownBench 42%, 1,772 samples	181x

EDIT WITH CUSTOM PC BUILDER

Popular PM991 Samsu 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.

UserBenchmark of the month

Gaming

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ProGaming

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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) 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 $269	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 $178	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 512GB

Average Bench: 138% (171^st 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 Latitude 5400

Popular PM991 Samsu 512GB systems:

UserBenchmark of the month

How it works

Group Test Results

Comments

Speed Comparisons

Frequently Asked Questions

Best User Rated

Nvme

PM991 Samsu 512GB

Average Bench: 138% (171st 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 Latitude 5400

Popular PM991 Samsu 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

Feedback

Average Bench: 138% (171^st of 1072)