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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%
84GB free (System drive)
Firmware: 10410106 Max speed: PCIe 5,000 MB/s
SusWrite @10s intervals: 776 882 496 304 300 304 MB/s
147% Outstanding
Read 301
Write 389
Mixed 684
SusWrite 510
107% 471 MB/s
4K Read 48.8
4K Write 116
4K Mixed 64.8
218% 76.6 MB/s
DQ Read 934
DQ Write 664
DQ Mixed 413
413% 670 MB/s
127GB free (System drive)
Firmware: 10410106 Max speed: PCIe 5,000 MB/s
SusWrite @10s intervals: 509 437 780 368 361 359 MB/s
129% Outstanding
Read 1,051
Write 513
Mixed 856
SusWrite 469
161% 722 MB/s
4K Read 31.5
4K Write 60.6
4K Mixed 39.5
130% 43.9 MB/s
DQ Read 437
DQ Write 335
DQ Mixed 384
288% 386 MB/s
110GB free (System drive)
Firmware: 10410106 Max speed: PCIe 5,000 MB/s
SusWrite @10s intervals: 414 567 419 384 347 342 MB/s
118% Outstanding
Read 596
Write 455
Mixed 803
SusWrite 412
128% 566 MB/s
4K Read 40.8
4K Write 80
4K Mixed 49.1
167% 56.6 MB/s
DQ Read 572
DQ Write 216
DQ Mixed 472
328% 420 MB/s
112GB free (System drive)
Firmware: 10410104 Max speed: PCIe 5,000 MB/s
SusWrite @10s intervals: 380 371 448 378 426 377 MB/s
115% Outstanding
Read 814
Write 632
Mixed 688
SusWrite 396
142% 633 MB/s
4K Read 32.1
4K Write 69.8
4K Mixed 42.1
140% 48 MB/s
DQ Read 459
DQ Write 216
DQ Mixed 439
299% 371 MB/s
75GB free (System drive)
Firmware: 10410106 Max speed: PCIe 5,000 MB/s
SusWrite @10s intervals: 297 228 444 296 345 394 MB/s
87.1% Excellent
Read 799
Write 150
Mixed 610
SusWrite 334
105% 473 MB/s
4K Read 4.7
4K Write 45.2
4K Mixed 30
70% 26.6 MB/s
DQ Read 406
DQ Write 118
DQ Mixed 307
214% 277 MB/s
49GB free (System drive)
Firmware: 10410106 Max speed: PCIe 5,000 MB/s
SusWrite @10s intervals: 304 259 265 153 85 87 MB/s
84.9% Excellent
Read 738
Write 405
Mixed 396
SusWrite 192
96% 433 MB/s
4K Read 25.6
4K Write 60
4K Mixed 27.8
106% 37.8 MB/s
DQ Read 341
DQ Write 159
DQ Mixed 217
170% 239 MB/s
2,731 MORE »

 Market Share (See Leaders)

The number of benchmark samples for this model as a percentage of all 73,436,901 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 3,486 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 samples1,373x
Core i5-1145G7IntelBench 69%, 4,608 samples1,034x
Core i7-1185G7IntelBench 67%, 9,588 samples719x
GPU
Iris XeIntelBench 14%, 144,774 samples3,392x
UHD GraphicsIntelBench 9%, 18,212 samples59x
UHD GraphicsIntelBench 5%, 110,580 samples23x
SSD
KBG40ZNS256G KIOXIA 256GBNvmeBench 160%, 2,731 samples1x
RAM
HMAA2GS6AJR8N-XN 1x16GBUnknownBench 48%, 1,650 samples870x
HMAA2GS6CJR8N-XN 1x16GBUnknownBench 40%, 3,085 samples424x
HMAA1GS6CJR6N-XN 1x8GBUnknownBench 37%, 6,851 samples277x
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 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

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) December 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]

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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 $270Nvidia RTX 4060 $295Crucial MX500 250GB $30
Intel Core i5-12400F $146Nvidia RTX 4060-Ti $360Samsung 850 Evo 120GB $80
Intel Core i5-12600K $189Nvidia RTX 3060-Ti $340Samsung 860 Evo 250GB $49
HDDRAMUSB
Seagate Barracuda 1TB (2016) $40Corsair Vengeance LPX DDR4 3200 C16 2x8GB $42SanDisk Extreme 64GB $72
WD Blue 1TB (2012) $30Corsair Vengeance LPX DDR4 3000 C15 2x8GB $43SanDisk Extreme 32GB $28
Seagate Barracuda 2TB (2016) $50G.SKILL Trident Z DDR4 3200 C14 4x16GB $357SanDisk Ultra Fit 32GB $16
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