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Nvme

KBG40ZNS256G KIOXIA 256GB

▲ 500 ▼

Release date ≈ Q4 2020.

Average Bench: 160% (144th of 1072)

Based on 2,731 user benchmarks.  Model: NVMe KBG40ZNS256G NVMe KIOXIA 256GB
Poor: 87%Average: 160% Great: 230%

Popular builds with this SSD

Outstanding average bench

The Nvme KBG40ZNS256G KIOXIA 256GB averaged 59.6% higher than the peak scores attained by the group leaders. This is an excellent result which ranks the Nvme KBG40ZNS256G KIOXIA 256GB near the top of the comparison list.

Strengths

Avg. 4K-64Thread Mixed IO Speed 517MB/s
Avg. 4K-64Thread Read Speed 826MB/s

Terrible consistency

The range of scores (95th - 5th percentile) for the Nvme KBG40ZNS256G KIOXIA 256GB is 143%. This is a particularly wide range which indicates that the Nvme KBG40ZNS256G KIOXIA 256GB performs inconsistently under varying real world conditions.

Weaknesses

Avg. Sustained Write Speed 422MB/s
Avg. 4K-64Thread Write Speed 396MB/s
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Average Bench

(Based on 2,731 samples)
Rank 144160%
Min Avg Max
492 Read 1,088 1,551
97.9 Write 853 1,469
139 Mixed 882 1,312
68.5 SusWrite 422 574
181% 811 MB/s
Min Avg Max
18.1 4K Read 47.1 58
35.6 4K Write 113 196
24.8 4K Mixed 57.9 79.8
205% 72.7 MB/s
Min Avg Max
328 DQ Read 826 1,371
80.9 DQ Write 396 802
104 DQ Mixed 517 702
408% 580 MB/s
User Benchmarks BenchSequentialRandom 4kDeep queue 4k
The fastest SSD (mainstream) averages a speed of 100%
130GB free (System drive)
Firmware: 10410104 Max speed: PCIe 16,000 MB/s
SusWrite @10s intervals: 797 387 605 399 404 358 MB/s
178% Outstanding
Read 1,408
Write 1,138
Mixed 1,155
SusWrite 491
234% 1,048 MB/s
4K Read 47.9
4K Write 106
4K Mixed 61.1
207% 71.7 MB/s
DQ Read 738
DQ Write 498
DQ Mixed 547
428% 595 MB/s
122GB free (System drive)
Firmware: 10410106 Max speed: PCIe 16,000 MB/s
SusWrite @10s intervals: 635 766 406 356 309 241 MB/s
169% Outstanding
Read 1,254
Write 1,079
Mixed 1,061
SusWrite 452
215% 962 MB/s
4K Read 49.9
4K Write 116
4K Mixed 63.4
218% 76.6 MB/s
DQ Read 731
DQ Write 309
DQ Mixed 511
381% 517 MB/s
92GB free (System drive)
Firmware: 10410106 Max speed: PCIe 16,000 MB/s
SusWrite @10s intervals: 597 563 523 361 327 285 MB/s
159% Outstanding
Read 1,165
Write 890
Mixed 947
SusWrite 443
193% 861 MB/s
4K Read 47.3
4K Write 100
4K Mixed 59.2
201% 69 MB/s
DQ Read 778
DQ Write 265
DQ Mixed 549
398% 531 MB/s
89GB free (System drive)
Firmware: 10410106 Max speed: PCIe 16,000 MB/s
SusWrite @10s intervals: 450 183 108 121 303 400 MB/s
140% Outstanding
Read 1,043
Write 135
Mixed 365
SusWrite 261
98% 451 MB/s
4K Read 8
4K Write 109
4K Mixed 58.5
145% 58.4 MB/s
DQ Read 967
DQ Write 596
DQ Mixed 691
539% 751 MB/s
238GB free
Firmware: 10410106 Max speed: PCIe 16,000 MB/s
SusWrite @10s intervals: 332 659 764 356 395 285 MB/s
121% Outstanding
Read 26.9
Write 889
Mixed 898
SusWrite 465
132% 570 MB/s
4K Read 49.2
4K Write 108
4K Mixed 64.4
214% 73.9 MB/s
DQ Read 823
DQ Write 284
DQ Mixed 556
410% 555 MB/s
55GB free (System drive)
Firmware: 10410106 Max speed: PCIe 16,000 MB/s
SusWrite @10s intervals: 368 337 368 369 319 247 MB/s
70.6% Very good
Read 46.5
Write 92
Mixed 881
SusWrite 335
78% 339 MB/s
4K Read 39.3
4K Write 56.3
4K Mixed 32.2
131% 42.6 MB/s
DQ Read 269
DQ Write 120
DQ Mixed 195
145% 195 MB/s
2,731 MORE »

 Market Share (See Leaders)

The number of benchmark samples for this model as a percentage of all 75,881,092 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 KBG40ZNS256G KIOXIA 256GB Builds (Compare 3,705 builds) See popular component choices, score breakdowns and rankings
Gaming
Gaming 15%
Tree trunk
Desktop
Desktop 76%
Battleship
Workstation
Workstation 13%
Tree trunk

System: Dell Latitude 5420

CPU
Core i5-1135G7IntelBench 69%, 36,962 samples1,421x
Core i5-1145G7IntelBench 69%, 4,608 samples1,125x
Core i7-1185G7IntelBench 67%, 9,588 samples769x
GPU
Iris XeIntelBench 14%, 144,774 samples3,602x
UHD GraphicsIntelBench 9%, 39,662 samples67x
UHD GraphicsIntelBench 5%, 110,580 samples24x
SSD
KBG40ZNS256G KIOXIA 256GBNvmeBench 160%, 2,731 samples1x
RAM
HMAA2GS6AJR8N-XN 1x16GBUnknownBench 48%, 1,650 samples885x
HMAA2GS6CJR8N-XN 1x16GBUnknownBench 40%, 3,085 samples453x
HMAA1GS6CJR6N-XN 1x8GBUnknownBench 32%, 13,137 samples295x
EDIT WITH CUSTOM PC BUILDER

Popular KBG40ZNS256G KIOXIA 256GB 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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Gaming Desktop ProGaming

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) May 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]

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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.

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Speed Comparisons

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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 »

 Best User Rated
The Best.
CPUGPUSSD
Intel Core i5-13600K $254Nvidia RTX 4060 $289Crucial MX500 250GB $39
Intel Core i5-12400F $133Nvidia RTX 4060-Ti $385Samsung 850 Evo 120GB $80
Intel Core i5-12600K $175Nvidia RTX 4070 $550Samsung 860 Evo 250GB $52
HDDRAMUSB
Seagate Barracuda 1TB (2016) $39Corsair Vengeance LPX DDR4 3200 C16 2x8GB $39SanDisk Extreme 64GB $72
WD Blue 1TB (2012) $32Corsair Vengeance LPX DDR4 3000 C15 2x8GB $45SanDisk Extreme 32GB $28
Seagate Barracuda 2TB (2016) $62G.SKILL Trident Z DDR4 3200 C14 4x16GB $351SanDisk Ultra Fit 32GB $16
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