Pm991

NVMe Samsung 256GB

NVMe Samsung 256GB
BENCHMARKS (4,948)
MKT (0%)
BUILDS
(0)

Effective Speed -0%Effective Speed -0%Average Score -14%Read 84%, Write -48%, 4K Read -4%, 4K Write -1%, Mixed -15%, 4K Mixed -20%, SusWrite -95%Peak Score +53% Read 134%, Write 85%, 4K Read 17%, 4K Write 10%, Mixed 109%, 4K Mixed 18%, SusWrite -5%Value & Sentiment -379%User Rating -13%, Market Share -744%Nice To Haves +40% DQ Read 31%, DQ Write 121%, DQ Mixed 67%, ADQ Read -15%, ADQ Write -33%, ADQ Mixed -15%, Age 102%, AS-SSD Total 61%

Average Bench: 98.4% (261^st of 1071)

Based on 4,948 user benchmarks. Model: PM991 NVMe Samsung 256GB

Poor: 64%Average: 98.4% Great: 166%

Popular builds with this SSD

Excellent average bench

The Pm991 NVMe Samsung 256GB averaged just 1.6% lower than the peak scores attained by the group leaders. This is an excellent result which ranks the Pm991 NVMe Samsung 256GB near the top of the comparison list.

Strengths

Avg. 4K-64Thread Mixed IO Speed 226MB/s

Avg. Sequential Read Speed 844MB/s

See where your SSD ranks →

Terrible consistency

The range of scores (95th - 5th percentile) for the Pm991 NVMe Samsung 256GB is 101%. This is a particularly wide range which indicates that the Pm991 NVMe Samsung 256GB performs inconsistently under varying real world conditions.

Weaknesses

Avg. Sustained Write Speed 152MB/s

Avg. Sequential Write Speed 273MB/s

Average Bench

(Based on 4,948 samples)

Rank 26198.4%

Min	Avg	Max
527	Read 844	1,186
68.6	Write 273	899
125	Mixed 313	883
62.5	SusWrite 152	370
86.4% 395 MB/s

Min	Avg	Max
17.5	4K Read 33.1	50.4
40.2	4K Write 87.1	135
18.3	4K Mixed 37.6	68.9
145% 52.6 MB/s

Min	Avg	Max
182	DQ Read 285	481
71	DQ Write 216	791
98.1	DQ Mixed 226	553
176% 242 MB/s

User Benchmarks

Bench

Sequential

Random 4k

Deep queue 4k

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

USA-User, 23 hrs ago.

27GB free (System drive)

Firmware: 25309039 Max speed: PCIe 5,000 MB/s

SusWrite @10s intervals: 131 135 125 124 75 75 MB/s

80.1% Excellent

Write 125

Mixed 224

SusWrite 111

68% 315 MB/s

4K Read 26.6

4K Write 64.5

4K Mixed 27.7

110% 39.6 MB/s

DQ Read 224

DQ Write 127

DQ Mixed 164

125% 171 MB/s

USA-User, 23 hrs ago.

27GB free (System drive)

Firmware: 25309039 Max speed: PCIe 5,000 MB/s

SusWrite @10s intervals: 110 81 81 79 79 77 MB/s

71.6% Very good

Write 131

Mixed 162

SusWrite 84.5

55% 256 MB/s

4K Read 24.3

4K Write 72.2

4K Mixed 29.9

113% 42.1 MB/s

DQ Read 143

DQ Write 118

DQ Mixed 116

91% 126 MB/s

CHL-User, 6 hrs ago.

86GB free (System drive)

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

SusWrite @10s intervals: 108 120 120 95 108 100 MB/s

63.4% Good

Write 146

Mixed 224

SusWrite 109

51% 230 MB/s

4K Read 22.5

4K Write 61.2

4K Mixed 26.8

101% 36.8 MB/s

DQ Read 244

DQ Write 121

DQ Mixed 181

135% 182 MB/s

4,948 MORE »

Market Share (See Leaders)

The number of benchmark samples for this model as a percentage of all 65,310,920 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 NVMe Samsung 256GB Builds (Compare 2,054 builds) See popular component choices, score breakdowns and rankings.

Gaming 10%

Tree trunk

Desktop 64%

Destroyer

Workstation 9%

Tree trunk

System: Dell G3 3590

CPU
Core i5-9300HIntelBench 65%, 116,682 samples	1,046x
Core i7-9750HIntelBench 73%, 328,182 samples	1,008x

GPU
UHD Graphics 630IntelBench 5%, 506,702 samples	1,008x
GTX 1660-Ti (Mobile Max-Q)NvidiaBench 57%, 12,899 samples	624x
GTX 1650 (Mobile)NvidiaBench 41%, 92,838 samples	302x

SSD
NVMe Samsung 256GBPm991Bench 98%, 4,948 samples	1x

RAM
HMA851S6JJR6N-VK 2x4GBUnknownBench 62%, 3,853 samples	170x
4ATF51264HZ-2G6E1 2x4GBUnknownBench 61%, 5,023 samples	144x
KKN2NM-MIE 2x4GBUnknownBench 59%, 2,182 samples	137x

EDIT WITH CUSTOM PC BUILDER

Popular NVMe Samsung 256GB 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.

UserBenchmark of the month

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ProGaming

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USB

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) March 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.

1071 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 $320	Nvidia RTX 3060 $350	Crucial MX500 250GB $34
Intel Core i5-12600K $194	Nvidia RTX 3060-Ti $420	Samsung 850 Evo 120GB $106
Intel Core i5-12400F $158	Nvidia RTX 4070-Ti $830	Samsung 860 Evo 250GB $50

HDD	RAM	USB
Seagate Barracuda 1TB (2016) $34	Corsair Vengeance LPX DDR4 3200 C16 2x8GB $43	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) $80	G.SKILL Trident Z DDR4 3200 C14 4x16GB $381	SanDisk Ultra Fit 32GB $16

Pm991

NVMe Samsung 256GB

Average Bench: 98.4% (261^st of 1071)

Popular builds with this SSD

Excellent average bench

Strengths

Terrible consistency

Weaknesses

Average Bench

Market Share (See Leaders)

CHOOSE A COMPONENT:

System: Dell G3 3590

Popular NVMe Samsung 256GB systems:

UserBenchmark of the month

How it works

Group Test Results

Comments

Speed Comparisons

Frequently Asked Questions

Best User Rated

Pm991

NVMe Samsung 256GB

Average Bench: 98.4% (261st of 1071)

Popular builds with this SSD

Excellent average bench

Strengths

Terrible consistency

Weaknesses

Average Bench

Market Share (See Leaders)

CHOOSE A COMPONENT:

System: Dell G3 3590

Popular NVMe Samsung 256GB 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: 98.4% (261^st of 1071)