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Toshiba BG4 KBG40ZNS128G

The Toshiba KBG40ZNS128G is a very compact (single side M.2 22x30 mm) SSD for tablets, laptops, IoT devices. We found the 128 GB drive's performance to be subpar in our independent testing conducted in 2019.

Performance

The NVMe class drive (PCI-E 3.0 x4) fell short of its rated capabilities in our testing. While Toshiba/Kioxia promises read and write rates of up to 2000 MB/s and 800 MB/s respectively, the real world results do not get anywhere near those targets, lagging behind many SATA III class drives in a few scenarios.

Power Consumption

The consumption should be relatively low at around 3 W (according to the manufacturer). Nonetheless, the drive will probably see a lot of thermal throttling throughout its useful life span, just as most M.2 SSDs do.

Notebookcheck says:

... While sequential read rates on the SSD are decent at about 1200 MB/s, sequential write rates are slower than even most SATA III SSDs at just under 200 MB/s. This is a budget drive after all with similar results to the Toshiba BG3 found on the Dell G7 17 7790 - Dell G3 15 3590 Laptop Review, 2019

TypeSSD
SizeM.2
InterfaceNVMe
Announced07.10.2019
LinkToshiba BG4 KBG40ZNS128G

Benchmarks

Performance Rating - DiskSpd
13.8 pt (19%)
64 GB eMMC Flash
2.34 -83%
...
FPT330M8SSD512G
10.1 -27%
Apple SSD AP0256
10.5 -24%
Samsung SSD PM871b MZNLN256HAJQ
10.8 -22%
Western Digital WD Blue 3D WDBNCE5000PNC
11 -20%
Samsung SSD 860 Evo 512GB
11.2 -19%
Samsung SSD 860 Evo 256GB M.2
11.9 -14%
SK hynix HFB1M8MQ331C0MR
12.1 -12%
Crucial P2 1TB CT1000P2SSD8
12.6 -9%
SK hynix BC501 HFM256GDGTNG
13.6 -1%
Toshiba BG4 KBG40ZNS128G
13.8
Intel SSD 600p SSDPEKKW512G7
14.4 4%
Apple SSD SM0512F
14.8 7%
Toshiba BG4 KBG40ZNT256G
14.8 7%
Toshiba KBG30ZMV256G
15 9%
EDGE NextGen SSD 1TB
15.1 9%
256 GB NVMe
15.1 9%
Apple SSD AP0512
15.1 9%
Kingston RBUSNS8154P3512GJ
15.4 12%
SK Hynix BC711 HFM128GD3HX015N
15.4 12%
...
2x Samsung SSD 980 Pro 2TB MZ-V8P2T0 (RAID 0)
73.3 431%
0%
100%
AS SSD - Copy Game
min: 165.9     avg: 171     median: 171 (3%)     max: 176 MB/s
+ 2 benchmarks and specifications   + Show comparison chart
AS SSD - Copy Program
min: 108.2     avg: 135.6     median: 135.6 (5%)     max: 163 MB/s
+ 2 benchmarks and specifications   + Show comparison chart
AS SSD - Copy ISO
min: 215.7     avg: 216.3     median: 216.3 (2%)     max: 216.8 MB/s
+ 2 benchmarks and specifications   + Show comparison chart
AS SSD - Score Total
min: 987     avg: 1136     median: 1135.5 (11%)     max: 1284 Points
+ 2 benchmarks and specifications   + Show comparison chart
AS SSD - Score Write
min: 157     avg: 273     median: 273 (5%)     max: 389 Points
+ 2 benchmarks and specifications   + Show comparison chart
AS SSD - Score Read
min: 575     avg: 595     median: 595 (15%)     max: 615 Points
+ 2 benchmarks and specifications   + Show comparison chart
AS SSD - Access Time Write *
min: 0.181     avg: 0.6     median: 0.6 (1%)     max: 0.94 ms
+ 2 benchmarks and specifications   + Show comparison chart
AS SSD - Access Time Read *
min: 0.124     avg: 0.1     median: 0.1 (0%)     max: 0.168 ms
+ 2 benchmarks and specifications   + Show comparison chart
AS SSD - 4K-64 Write
min: 68.8     avg: 135.9     median: 135.9 (3%)     max: 203 MB/s
+ 2 benchmarks and specifications   + Show comparison chart
AS SSD - 4K-64 Read
min: 424     avg: 442.6     median: 442.6 (13%)     max: 461.2 MB/s
+ 2 benchmarks and specifications   + Show comparison chart
AS SSD - 4K Write
min: 69.4     avg: 117.6     median: 117.6 (32%)     max: 165.7 MB/s
+ 2 benchmarks and specifications   + Show comparison chart
AS SSD - 4K Read
min: 34.01     avg: 36.8     median: 36.8 (12%)     max: 39.5 MB/s
+ 2 benchmarks and specifications   + Show comparison chart
AS SSD - Sequential Write
min: 186     avg: 192.9     median: 192.9 (2%)     max: 199.8 MB/s
+ 2 benchmarks and specifications   + Show comparison chart
AS SSD - Sequential Read
min: 1142     avg: 1158     median: 1158 (12%)     max: 1174 MB/s
+ 2 benchmarks and specifications   + Show comparison chart
CrystalDiskMark 5.2 / 6 - CDM 5/6 Write 4K
138.5 MB/s (13%)
+ 1 benchmarks and specifications   + Show comparison chart
CrystalDiskMark 5.2 / 6 - CDM 5/6 Read 4K
42 MB/s (1%)
+ 1 benchmarks and specifications   + Show comparison chart
CrystalDiskMark 5.2 / 6 - CDM 5 Write Seq
213.5 MB/s (1%)
+ 1 benchmarks and specifications   + Show comparison chart
CrystalDiskMark 5.2 / 6 - CDM 5 Read Seq
1289 MB/s (16%)
+ 1 benchmarks and specifications   + Show comparison chart
CrystalDiskMark 5.2 / 6 - CDM 5/6 Write 4K Q32T1
157.8 MB/s (6%)
+ 1 benchmarks and specifications   + Show comparison chart
CrystalDiskMark 5.2 / 6 - CDM 5/6 Read 4K Q32T1
448.9 MB/s (7%)
+ 1 benchmarks and specifications   + Show comparison chart
CrystalDiskMark 5.2 / 6 - CDM 5/6 Write Seq Q32T1
210.5 MB/s (2%)
+ 1 benchmarks and specifications   + Show comparison chart
CrystalDiskMark 5.2 / 6 - CDM 5/6 Read Seq Q32T1
1853 MB/s (14%)
+ 1 benchmarks and specifications   + Show comparison chart
DiskSpd - DiskSpd 4k_q1t1_write
121 MB/s (28%)
+ 1 benchmarks and specifications   + Show comparison chart
DiskSpd - DiskSpd 4k_q1t1_read
34.6 MB/s (10%)
+ 1 benchmarks and specifications   + Show comparison chart
DiskSpd - DiskSpd 4k_q32t16_write
163 MB/s (3%)
+ 1 benchmarks and specifications   + Show comparison chart
DiskSpd - DiskSpd 4k_q32t16_read
497 MB/s (9%)
+ 1 benchmarks and specifications   + Show comparison chart
DiskSpd - DiskSpd seq_write
240 MB/s (3%)
+ 1 benchmarks and specifications   + Show comparison chart
DiskSpd - DiskSpd seq_read
1336 MB/s (24%)
+ 1 benchmarks and specifications   + Show comparison chart
DiskSpd - DiskSpd seq_q8t1_write
241 MB/s (2%)
+ 1 benchmarks and specifications   + Show comparison chart
DiskSpd - DiskSpd seq_q8t1_read
1974 MB/s (15%)
+ 1 benchmarks and specifications   + Show comparison chart
DiskSpd - DiskSpd Loop seq_q8t1_read
1274 MB/s (10%)
+ 1 benchmarks and specifications   + Show comparison chart
- Range of benchmark values for this graphics card
- Average benchmark values for this graphics card
* Smaller numbers mean a higher performance

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v1.22
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#1 not redirecting to Ajax server +0s ... 0s

#2 did not recreate cache, as it is less than 5 days old! Created at Tue, 30 May 2023 20:13:09 +0200 +0.001s ... 0.001s

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

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#5 getting avg benchmarks for device 3406 +0.011s ... 0.015s

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#8 min, max, avg, median took s +0.567s ... 0.59s

#9 return log +0.013s ... 0.603s

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> Notebook / Laptop Reviews and News > Benchmarks / Tech > Laptop harddisks (HDD, SSD) benchmarks > Toshiba BG4 KBG40ZNS128G Benchmarked
Klaus Hinum (Update: 2020-03- 1)