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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 The SSD makes use of the outdated SATA III bus with a peak bandwidth of 600 MB/s. We first tested the Z400s in 2016.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 (1%)     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 (22%)     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

Amazon Logo
  • SanDisk Extreme Pro Micro SDXC UHS-I U3 A2 V30 Memory Card (256GB)
  • SanDisk Extreme PRO 256 GB Class 3/UHS-I (U3) V30 SDXC
  • Sandisk SDSQXCD-128G-GN6MA Extreme Pro Microsdxc 128gb+sd Flsh Adapter 200mb/s 90mb/s A2 C10 V30 U
  • SanDisk Micro SD 256GB UHS-I Class 10 Memory Card with Adapter - SDSQUNR-256G-GN6TA
  • SanDisk 256GB Ultra® microSDXC 120MB/s A1 Class 10 UHS-I

Add one or more devices and compare

In the following list you can select (and also search for) devices that should be added to the comparison. You can select more than one device.

search for model:
v1.35
log 26. 12:28:14

#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 Sun, 22 Feb 2026 01:40:48 +0100 +0.003s ... 0.003s

#4 composed specs +0.008s ... 0.01s

#5 did output specs +0s ... 0.01s

#6 getting avg benchmarks for device 835 +0.003s ... 0.014s

#7 got single benchmarks 835 +0.011s ... 0.024s

#8 got avg benchmarks for devices +0s ... 0.024s

#9 min, max, avg, median took s +3.475s ... 3.5s

#10 return log +0.702s ... 4.201s

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 package work?
Intel Core i5-7200U, AMD Radeon R7 M440, 17.3", 2.5 kg
HP 15-ba077ng Notebook Review

HP 15-ba077ng Notebook Review

Low-cost office. HP delivers a home-office laptop with the 15-ba077ng. Its quiet system noise, low temperature development, and fast solid-state drive speak for the laptop. However, the laptop has some drawbacks. This was to be expected considering the price of approximately 450 Euros (~$482).
AMD A12-9700P, Radeon R7 (Bristol Ridge), 15.6", 2 kg
HP ProBook 470 G4 Notebook Review

HP ProBook 470 G4 Notebook Review

Business giant17-inch laptops are rare in the business sector. Thus, it is all the more pleasing that HP offers a particularly well-conceived model in its portfolio in the form of HP ProBook 470 G4. Our report reveals why it does not have any serious competition.
Intel Core i7-7500U, NVIDIA GeForce 930MX, 17.3", 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. Despite these new features, the laptop has also inherited disadvantageous properties.
Intel Core i5-6200U, HD Graphics 520, 15.6", 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)