Average Bench: 82.7% (384th of 1012)

Based on 4,265 user benchmarks.  Models: SanDisk SD8SB8U512G1122, SanDisk SD8SN8U512G1122, SanDis SD8SB8U512G1122

Very good average bench

The SanDisk X400 512GB averaged just 17.2% lower than the peak scores attained by the group leaders. This is an excellent result which ranks the SanDisk X400 512GB near the top of the comparison list.

Strengths

Avg. 4K-64Thread Mixed IO Speed 199MB/s
Avg. 4K Random Mixed IO Speed 34.5MB/s

Average consistency

The range of scores (95th - 5th percentile) for the SanDisk X400 512GB is 41.1%. This is a relatively wide range which indicates that the SanDisk X400 512GB performs inconsistently under varying real world conditions.

Weaknesses

Avg. Sustained Write Speed 235MB/s
Avg. Sequential Mixed IO Speed 256MB/s
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Average Bench

(Based on 4,265 samples)
Min Avg Max
349 Read 444 499
229 Write 372 467
179 Mixed 256 333
100 SusWrite 235 302
73% 327 MB/s
Min Avg Max
16.8 4K Read 26.7 36.9
35 4K Write 71.3 114
19.9 4K Mixed 34.5 48.9
122% 44.2 MB/s
Min Avg Max
179 DQ Read 323 371
150 DQ Write 252 286
109 DQ Mixed 199 234
173% 258 MB/s
User Benchmarks Bench Sequential Random 4k Deep queue 4k
The fastest SSD (mainstream) averages a speed of 100%
426GB free (System drive)
Firmware: X4140000
SusWrite @10s intervals: 324 293 290 293 294 279 MB/s
Read 499
Write 473
Mixed 271
SusWrite 296
86% 385 MB/s
4K Read 35.9
4K Write 89.5
4K Mixed 46.6
162% 57.3 MB/s
DQ Read 287
DQ Write 214
DQ Mixed 168
148% 223 MB/s
381GB free (System drive)
Firmware: X4120000
SusWrite @10s intervals: 271 253 246 243 236 240 MB/s
Read 505
Write 391
Mixed 249
SusWrite 248
78% 348 MB/s
4K Read 34.3
4K Write 116
4K Mixed 31.1
153% 60.5 MB/s
DQ Read 347
DQ Write 278
DQ Mixed 208
184% 278 MB/s
385GB free
Firmware: X4140000
SusWrite @10s intervals: 334 304 294 292 287 294 MB/s
Read 491
Write 376
Mixed 306
SusWrite 301
82% 368 MB/s
4K Read 23.4
4K Write 61.2
4K Mixed 37
115% 40.5 MB/s
DQ Read 342
DQ Write 283
DQ Mixed 215
188% 280 MB/s
66GB free
Firmware: X4140000
SusWrite @10s intervals: 179 180 38 39 56 67 MB/s
Read 446
Write 291
Mixed 266
SusWrite 93.3
61% 274 MB/s
4K Read 23.8
4K Write 66.6
4K Mixed 31.1
111% 40.5 MB/s
DQ Read 382
DQ Write 240
DQ Mixed 174
167% 266 MB/s
309GB free (System drive)
Firmware: X4140000
SusWrite @10s intervals: 240 263 188 238 214 230 MB/s
Read 454
Write 378
Mixed 262
SusWrite 229
74% 331 MB/s
4K Read 22.4
4K Write 34.4
4K Mixed 19.2
77% 25.3 MB/s
DQ Read 342
DQ Write 259
DQ Mixed 230
191% 277 MB/s
26GB free
Firmware: X4120000
SusWrite @10s intervals: 236 243 276 278 277 275 MB/s
Read 384
Write 333
Mixed 217
SusWrite 264
67% 300 MB/s
4K Read 17.3
4K Write 39.6
4K Mixed 27.2
82% 28 MB/s
DQ Read 24.7
DQ Write 60.2
DQ Mixed 35.1
29% 40 MB/s
38GB free (System drive)
Firmware: X4162000
SusWrite @10s intervals: 130 111 56 45 42 36 MB/s
Read 407
Write 360
Mixed 194
SusWrite 70.3
57% 258 MB/s
4K Read 21.1
4K Write 42
4K Mixed 23
84% 28.7 MB/s
DQ Read 311
DQ Write 160
DQ Mixed 154
136% 208 MB/s
4,265 MORE »

 Market Share (See Leaders)

The number of benchmark samples for this model as a percentage of all 19,944,724 SSDs tested.

 Prices

EbayUS $1096 mins
AmazonUS $15022 days
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Typical X400 512GB Builds (Compare 6,897 builds) See popular component choices, score breakdowns and rankings.
Gaming
Gaming 74%
Battleship
Desktop
Desktop 75%
Battleship
Workstation
Workstation 54%
Yacht

Motherboard: MSI Z170A GAMING PRO CARBON (MS-7A12) - $127

EDIT WITH CUSTOM PC BUILDER Value: 58% - Above average Total price: $1,007

Popular X400 512GB compatible motherboards:

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

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.
  • - 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.
  • - Share your opinion by voting.
Solid State Drive Rankings (Price vs Performance) December 2019 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.

 Comments

1012 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

 Best User Rated

The Best.
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Intel Core i7-9700K $360AMD RX 590 $180Samsung 850 Pro 512GB $230
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WD Blue 1TB (2012) $34Corsair Vengeance LPX DDR4 3000 C15 2x8GB $58SanDisk Extreme 32GB $46
Seagate Barracuda 3TB (2016) $80G.SKILL Trident Z DDR4 3200 C14 4x16GB $613SanDisk Extreme 16GB $24
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