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Nvme

PM991 Samsu 128GB

▲ 500 ▼

Release date ≈ Q1 2020.

Average Bench: 113% (207th of 1080)

Based on 50 user benchmarks.  Model: NVMe PM991 NVMe Samsu
Poor: 68%Average: 113% Great: 167%

Popular builds with this SSD

Outstanding average bench

The Nvme PM991 Samsu 128GB averaged 13.4% higher than the peak scores attained by the group leaders. This is an excellent result which ranks the Nvme PM991 Samsu 128GB near the top of the comparison list.

Strengths

Avg. 4K-64Thread Mixed IO Speed 332MB/s
Avg. Sequential Read Speed 1,004MB/s

Terrible consistency

The range of scores (95th - 5th percentile) for the Nvme PM991 Samsu 128GB is 99.4%. This is a particularly wide range which indicates that the Nvme PM991 Samsu 128GB performs inconsistently under varying real world conditions.

Weaknesses

Avg. Sustained Write Speed 160MB/s
Avg. Sequential Write Speed 467MB/s

Average Bench

(Based on 50 samples)
Rank 207113%
Min Avg Max
445 Read 1,004 1,432
28.6 Write 467 963
128 Mixed 507 1,020
48.6 SusWrite 160 249
118% 535 MB/s
Min Avg Max
12.4 4K Read 34 53.3
18.8 4K Write 89.3 145
16.2 4K Mixed 43.9 70.9
155% 55.7 MB/s
Min Avg Max
33.6 DQ Read 363 508
58.5 DQ Write 333 792
33.2 DQ Mixed 332 575
253% 343 MB/s
User Benchmarks BenchSequentialRandom 4kDeep queue 4k
The fastest SSD (mainstream) averages a speed of 100%
73GB free (System drive)
Firmware: 25309039 Max speed: PCIe 16,000 MB/s
SusWrite @10s intervals: 400 188 190 191 187 186 MB/s
137% Outstanding
Read 1,254
Write 896
Mixed 908
SusWrite 224
182% 821 MB/s
4K Read 41.2
4K Write 85.3
4K Mixed 53.7
176% 60.1 MB/s
DQ Read 503
DQ Write 321
DQ Mixed 423
312% 416 MB/s
89GB free (System drive)
Firmware: 25307039 Max speed: PCIe 16,000 MB/s
SusWrite @10s intervals: 318 187 186 185 184 188 MB/s
127% Outstanding
Read 1,159
Write 903
Mixed 879
SusWrite 208
175% 787 MB/s
4K Read 33.3
4K Write 68.5
4K Mixed 45
144% 48.9 MB/s
DQ Read 506
DQ Write 503
DQ Mixed 538
395% 516 MB/s
17GB free (System drive)
Firmware: 7039 Max speed: PCIe 16,000 MB/s
SusWrite @10s intervals: 195 200 194 193 200 193 MB/s
102% Outstanding
Read 972
Write 196
Mixed 298
SusWrite 196
90% 415 MB/s
4K Read 25.7
4K Write 92.9
4K Mixed 35
133% 51.2 MB/s
DQ Read 286
DQ Write 187
DQ Mixed 223
170% 232 MB/s
17GB free (System drive)
Firmware: 25307039 Max speed: PCIe 16,000 MB/s
SusWrite @10s intervals: 107 112 105 104 105 108 MB/s
91.3% Outstanding
Read 942
Write 122
Mixed 182
SusWrite 107
72% 338 MB/s
4K Read 29.3
4K Write 75.5
4K Mixed 31.9
125% 45.6 MB/s
DQ Read 285
DQ Write 112
DQ Mixed 161
129% 186 MB/s
19GB free (System drive)
Firmware: 25306039 Max speed: PCIe 16,000 MB/s
SusWrite @10s intervals: 76 64 64 60 59 57 MB/s
80.9% Excellent
Read 850
Write 101
Mixed 138
SusWrite 63.2
62% 288 MB/s
4K Read 27.2
4K Write 68.6
4K Mixed 28.5
114% 41.4 MB/s
DQ Read 285
DQ Write 88.2
DQ Mixed 121
106% 165 MB/s
20GB free (System drive)
Firmware: 25305039 Max speed: PCIe 16,000 MB/s
SusWrite @10s intervals: 81 82 76 75 59 67 MB/s
78.3% Very good
Read 930
Write 75.8
Mixed 188
SusWrite 73.1
68% 317 MB/s
4K Read 26
4K Write 65
4K Mixed 19.3
98% 36.8 MB/s
DQ Read 263
DQ Write 69.6
DQ Mixed 134
107% 156 MB/s
90GB free (System drive)
Firmware: 7039 Max speed: PCIe 16,000 MB/s
SusWrite @10s intervals: 124 105 97 93 91 82 MB/s
50.6% Above average
Read 513
Write 194
Mixed 239
SusWrite 98.5
57% 261 MB/s
4K Read 12.4
4K Write 20.2
4K Mixed 16.2
50% 16.3 MB/s
DQ Read 236
DQ Write 136
DQ Mixed 175
134% 183 MB/s
50 MORE »

 Market Share (See Leaders)

The number of benchmark samples for this model as a percentage of all 77,161,205 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 128GB Builds (Compare 2,233 builds) See popular component choices, score breakdowns and rankings
Gaming
Gaming 12%
Tree trunk
Desktop
Desktop 70%
Battle cruiser
Workstation
Workstation 11%
Tree trunk

System: Dell G5 5590

CPU
Core i7-9750HIntelBench 73%, 328,182 samples1,732x
Core i5-9300HIntelBench 65%, 116,682 samples210x
Core i7-8750HIntelBench 70%, 442,631 samples205x
GPU
UHD Graphics 630IntelBench 5%, 506,702 samples1,063x
RTX 2060 (Mobile)NvidiaBench 71%, 119,687 samples473x
GTX 1660-Ti (Mobile)NvidiaBench 65%, 82,746 samples377x
SSD
PM991 Samsu 128GBNvmeBench 113%, 50 samples1x
RAM
HMA81GS6JJR8N-VK 2x8GBUnknownBench 74%, 13,906 samples369x
M471A1K43DB1-CTD 2x8GBSamsungBench 76%, 43,895 samples274x
KHYXPX-MIE 2x8GBUnknownBench 76%, 5,852 samples256x
EDIT WITH CUSTOM PC BUILDER

Popular PM991 Samsu 128GB systems:

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Speed Comparisons

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1080 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?
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The Best
CPUGPUSSD
Intel Core i5-12600K $159Nvidia RTX 4060 $299WD Black SN850X M.2 2TB $133
Intel Core i5-12400F $112Nvidia RTX 4060-Ti $380WD Black SN850X M.2 1TB $75
Intel Core i7-14700K $355Nvidia RTX 4070 $500Crucial T700 M.2 4TB $350
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