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SanDisk Z400s SD8SNAT-256G

The SanDisk Z400s SD8SNAT-256G is an M.2 22x80 type solid state drive with a capacity of 256 GB. The SSD makes use of the outdated SATA III bus with a peak bandwidth of 600 MB/s. We first tested the Z400s in 2016.

Notebookcheck says:

... The determined transfer rates meet the specs from the manufacturer: SanDisk advertises up to 546 MB/s (read) and 342 MB/s (write) - HP Pavilion 17 Laptop Review, 2017

TypeSSD
SizeM.2 2280
Capacity256 GB
InterfaceM.2
Announced01.01.2016

Benchmarks

AS SSD - Copy Game
min: 171.1     avg: 207.5     median: 220 (4%)     max: 231.3 MB/s
+ 3 benchmarks and specifications   + Show comparison chart
AS SSD - Copy Program
min: 89.4     avg: 132.4     median: 151.4 (6%)     max: 156.3 MB/s
+ 3 benchmarks and specifications   + Show comparison chart
AS SSD - Copy ISO
min: 246.4     avg: 252.5     median: 248.2 (2%)     max: 263 MB/s
+ 3 benchmarks and specifications   + Show comparison chart
AS SSD - Score Total
min: 569     avg: 606     median: 616 (4%)     max: 632 Points
+ 3 benchmarks and specifications   + Show comparison chart
AS SSD - Score Write
min: 262     avg: 296.3     median: 306 (4%)     max: 321 Points
+ 3 benchmarks and specifications   + Show comparison chart
AS SSD - Score Read
min: 206     avg: 206.7     median: 207 (3%)     max: 207 Points
+ 3 benchmarks and specifications   + Show comparison chart
AS SSD - Access Time Write *
min: 0.157     avg: 0.2     median: 0.2 (0%)     max: 0.173 ms
+ 3 benchmarks and specifications   + Show comparison chart
AS SSD - Access Time Read *
min: 0.111     avg: 0.1     median: 0.1 (0%)     max: 0.153 ms
+ 3 benchmarks and specifications   + Show comparison chart
AS SSD - 4K-64 Write
min: 183.2     avg: 197.9     median: 198.8 (3%)     max: 211.8 MB/s
+ 3 benchmarks and specifications   + Show comparison chart
AS SSD - 4K-64 Read
min: 137.4     avg: 138.2     median: 137.9 (3%)     max: 139.3 MB/s
+ 3 benchmarks and specifications   + Show comparison chart
AS SSD - 4K Write
min: 54.1     avg: 69.4     median: 75.3 (15%)     max: 78.8 MB/s
+ 3 benchmarks and specifications   + Show comparison chart
AS SSD - 4K Read
min: 17.53     avg: 18.7     median: 19.3 (6%)     max: 19.37 MB/s
+ 3 benchmarks and specifications   + Show comparison chart
AS SSD - Sequential Write
min: 251.5     avg: 292.5     median: 309.1 (3%)     max: 316.9 MB/s
+ 3 benchmarks and specifications   + Show comparison chart
AS SSD - Sequential Read
min: 495.8     avg: 498.3     median: 498.1 (4%)     max: 501 MB/s
+ 3 benchmarks and specifications   + Show comparison chart
CrystalDiskMark 3.0 - 4K QD32 Write
min: 138     avg: 223.3     median: 241.3 (23%)     max: 272.7 MB/s
+ 4 benchmarks and specifications   + Show comparison chart
CrystalDiskMark 3.0 - 4K QD32 Read
min: 141.3     avg: 144.5     median: 144.3 (11%)     max: 148 MB/s
+ 4 benchmarks and specifications   + Show comparison chart
CrystalDiskMark 3.0 - 4K Write
min: 62.7     avg: 79.5     median: 83.7 (3%)     max: 88 MB/s
+ 4 benchmarks and specifications   + Show comparison chart
CrystalDiskMark 3.0 - 4K Read
min: 11.24     avg: 17.5     median: 18.9 (0%)     max: 20.99 MB/s
+ 4 benchmarks and specifications   + Show comparison chart
CrystalDiskMark 3.0 - 512K Write
min: 283.1     avg: 290.9     median: 289.4 (3%)     max: 300.3 MB/s
+ 3 benchmarks and specifications   + Show comparison chart
CrystalDiskMark 3.0 - 512K Read
min: 290.2     avg: 314.9     median: 321.2 (7%)     max: 333.4 MB/s
+ 3 benchmarks and specifications   + Show comparison chart
CrystalDiskMark 3.0 - Sequential Write
min: 243.3     avg: 303.4     median: 322.6 (3%)     max: 325.1 MB/s
+ 4 benchmarks and specifications   + Show comparison chart
CrystalDiskMark 3.0 - Sequential Read
min: 447.4     avg: 482.1     median: 486 (6%)     max: 509 MB/s
+ 4 benchmarks and specifications   + Show comparison chart
PCMark 8 - PCMark 8 Storage v2
4841 Points (94%)
+ 1 benchmarks and specifications   + Show comparison chart
- Range of benchmark values
red legend - Average benchmark values
* Smaller numbers mean a higher performance

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v1.33
log 02. 00:36:46

#0 ran 0s before starting gpusingle class +0s ... 0s

#1 no ids found in url (should be separated by "_") +0s ... 0s

#2 not redirecting to Ajax server +0s ... 0s

#3 did not recreate cache, as it is less than 5 days old! Created at Tue, 01 Jul 2025 20:29:48 +0200 +0.001s ... 0.001s

#4 composed specs +0.003s ... 0.004s

#5 did output specs +0s ... 0.004s

#6 getting avg benchmarks for device 835 +0.002s ... 0.006s

#7 got single benchmarks 835 +0.013s ... 0.019s

#8 got avg benchmarks for devices +0s ... 0.019s

#9 min, max, avg, median took s +0.925s ... 0.944s

#10 return log +0.001s ... 0.945s

Notebook reviews with SanDisk Z400s SD8SNAT-256G

HP Pavilion 17-x110ng Notebook Review

HP Pavilion 17-x110ng Notebook Review

17-inch multimedia notebook! Multimedia laptops are very versatile systems. HP offers a solid basis with a Kaby Lake processor and a discrete GPU. How does the ...
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HP 15-ba077ng Notebook Review

HP 15-ba077ng Notebook Review

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HP ProBook 470 G4 Notebook Review

HP ProBook 470 G4 Notebook Review

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Intel Core i7-7500U | NVIDIA GeForce 930MX | 17.30" | 2.8 kg
HP 250 G5 SP X0N33EA Notebook Review

HP 250 G5 SP X0N33EA Notebook Review

Generation change. Higher processing performance, finally a Full HD display and a faster storage device turn HP's new notebook into a true office all-rounder. D...
Intel Core i5-6200U | Intel HD Graphics 520 | 15.60" | 2.1 kg

HP ProBook 470 G4: Intel Core i7-7500U NVIDIA GeForce 930MX, 17.30", 2.8 kg
  External Review » HP ProBook 470 G4

HP 250 G5 SP X0N33EA: Intel Core i5-6200U Intel HD Graphics 520, 15.60", 2.1 kg
  External Review » HP 250 G5 SP X0N33EA

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Klaus Hinum (Update: 2020-09-26)