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Samsung PM991 MZVLQ256HAJD

PM991 MZVLQ256HAJD

The Samsung PM991 256 GB MZVLQ256HAJD is a mid range NVMe 1.3 SSD that uses the M.2 interface (2280). It uses Samsung 3D-NAND (V-NAND v5) and a Samsung controller.

TypeSSD
SizeM.2
Capacity256 GB
InterfaceNVMe
Announced26.05.2020

Benchmarks

Performance Rating - DiskSpd
17.2 pt (20%)
Seagate ST1000LM014 Solid State Hybrid Drive
0.687 -96%
...
Samsung PM991a MZVLQ256HBJD
16.8 -2%
Kioxia THGJFJT2T85BAT01
16.8 -2%
Samsung PM991 MZVLQ512HALU
16.9 -2%
BiWin CE480Y2D100-512G
17 -1%
Toshiba KBG40ZNS512G NVMe
17.1 -1%
Netac G938E
17.1 -1%
ADATA XPG Gammix S11L 1024GB
17.1 -1%
Samsung PM991 MZVLQ1T0HALB
17.1 -1%
SK Hynix HFS001TEJ9X164N
17.1 -1%
Samsung PM991 MZVLQ256HAJD
17.2
Intel SSDPEMKF512G8 NVMe SSD
17.3 1%
Lexar 512GB NM6A1 LNM6A1X512G-HNNG
17.3 1%
Foresee GSYAPGC-512G
17.4 1%
Crucial P1 SSD CT1000P1SSD8
17.4 1%
Toshiba BG4 KBG40ZPZ512G
17.5 2%
Samsung SSD SM961 1TB M.2 MZVKW1T0HMLH
17.5 2%
Micron 2210 MTFDHBA512QFD
17.7 3%
Phison PS5013 PM8256GPTCB4B8TF
17.7 3%
Micron 2400 MTFDKBA512QFM
17.7 3%
...
Kingston Fury Renegade G5 8TB
88.2 413%
0%
100%
Restrict / Search: Model: Max. age: years
AS SSD - Copy Game
min: 126.6     avg: 525     median: 546.1 (9%)     max: 882 MB/s
+ 4 benchmarks and specifications   + Show comparison chart
AS SSD - Copy Program
min: 60.6     avg: 299.9     median: 245.6 (9%)     max: 648 MB/s
+ 4 benchmarks and specifications   + Show comparison chart
AS SSD - Copy ISO
min: 236     avg: 712     median: 825 (3%)     max: 960 MB/s
+ 4 benchmarks and specifications   + Show comparison chart
AS SSD - Score Total
min: 1910     avg: 2055     median: 1953 (12%)     max: 2465 Points
+ 5 benchmarks and specifications   + Show comparison chart
AS SSD - Score Write
min: 903     avg: 952     median: 953 (13%)     max: 988 Points
+ 5 benchmarks and specifications   + Show comparison chart
AS SSD - Score Read
min: 658     avg: 756     median: 705 (11%)     max: 1031 Points
+ 5 benchmarks and specifications   + Show comparison chart
AS SSD - Access Time Write *
min: 0.023     avg: 0     median: 0 (0%)     max: 0.072 ms
+ 5 benchmarks and specifications   + Show comparison chart
AS SSD - Access Time Read *
min: 0.107     avg: 0.1     median: 0.1 (0%)     max: 0.156 ms
+ 5 benchmarks and specifications   + Show comparison chart
AS SSD - 4K-64 Write
min: 685     avg: 736     median: 741 (13%)     max: 780 MB/s
+ 5 benchmarks and specifications   + Show comparison chart
AS SSD - 4K-64 Read
min: 450     avg: 520     median: 464.1 (9%)     max: 748 MB/s
+ 5 benchmarks and specifications   + Show comparison chart
AS SSD - 4K Write
min: 105.1     avg: 135.4     median: 142.9 (28%)     max: 160.7 MB/s
+ 5 benchmarks and specifications   + Show comparison chart
AS SSD - 4K Read
min: 35.84     avg: 47.2     median: 49.4 (16%)     max: 54.6 MB/s
+ 5 benchmarks and specifications   + Show comparison chart
AS SSD - Sequential Write
min: 587     avg: 805     median: 860 (8%)     max: 1069 MB/s
+ 5 benchmarks and specifications   + Show comparison chart
AS SSD - Sequential Read
min: 1649     avg: 1892     median: 1784 (14%)     max: 2278 MB/s
+ 5 benchmarks and specifications   + Show comparison chart
CrystalDiskMark 3.0 - 4K QD32 Write
80.6 MB/s (8%)
+ 1 benchmarks and specifications   + Show comparison chart
CrystalDiskMark 3.0 - 4K QD32 Read
31.2 MB/s (2%)
+ 1 benchmarks and specifications   + Show comparison chart
CrystalDiskMark 3.0 - 4K Write
884 MB/s (29%)
+ 1 benchmarks and specifications   + Show comparison chart
CrystalDiskMark 3.0 - 4K Read
1352 MB/s (23%)
+ 1 benchmarks and specifications   + Show comparison chart
CrystalDiskMark 3.0 - 512K Write
361.3 MB/s (4%)
+ 1 benchmarks and specifications   + Show comparison chart
CrystalDiskMark 3.0 - 512K Read
271.9 MB/s (6%)
+ 1 benchmarks and specifications   + Show comparison chart
CrystalDiskMark 3.0 - Sequential Write
979 MB/s (9%)
+ 1 benchmarks and specifications   + Show comparison chart
CrystalDiskMark 3.0 - Sequential Read
2286 MB/s (26%)
+ 1 benchmarks and specifications   + Show comparison chart
CrystalDiskMark 5.2 / 6 - CDM 5/6 Write 4K
min: 80.6     avg: 143     median: 160.4 (14%)     max: 170.6 MB/s
+ 4 benchmarks and specifications   + Show comparison chart
CrystalDiskMark 5.2 / 6 - CDM 5/6 Read 4K
min: 31.2     avg: 43.2     median: 42.6 (1%)     max: 56.4 MB/s
+ 4 benchmarks and specifications   + Show comparison chart
CrystalDiskMark 5.2 / 6 - CDM 5 Write Seq
min: 720     avg: 855     median: 877.5 (5%)     max: 946 MB/s
+ 4 benchmarks and specifications   + Show comparison chart
CrystalDiskMark 5.2 / 6 - CDM 5 Read Seq
min: 1131     avg: 1328     median: 1270 (14%)     max: 1639 MB/s
+ 4 benchmarks and specifications   + Show comparison chart
CrystalDiskMark 5.2 / 6 - CDM 5/6 Write 4K Q32T1
min: 361     avg: 419.1     median: 416.2 (9%)     max: 483.1 MB/s
+ 4 benchmarks and specifications   + Show comparison chart
CrystalDiskMark 5.2 / 6 - CDM 5/6 Read 4K Q32T1
min: 272     avg: 329.7     median: 280.2 (4%)     max: 486.3 MB/s
+ 4 benchmarks and specifications   + Show comparison chart
CrystalDiskMark 5.2 / 6 - CDM 5/6 Write Seq Q32T1
min: 950     avg: 972     median: 973.5 (7%)     max: 989 MB/s
+ 4 benchmarks and specifications   + Show comparison chart
CrystalDiskMark 5.2 / 6 - CDM 5/6 Read Seq Q32T1
min: 1872     avg: 2174     median: 2254.5 (12%)     max: 2314 MB/s
+ 4 benchmarks and specifications   + Show comparison chart
DiskSpd - DiskSpd 4k_q1t1_write
min: 114     avg: 157.2     median: 171 (39%)     max: 175 MB/s
+ 5 benchmarks and specifications   + Show comparison chart
DiskSpd - DiskSpd 4k_q1t1_read
min: 46.5     avg: 53.7     median: 55.6 (16%)     max: 59.3 MB/s
+ 5 benchmarks and specifications   + Show comparison chart
DiskSpd - DiskSpd 4k_q32t16_write
min: 378     avg: 709     median: 762 (11%)     max: 827 MB/s
+ 5 benchmarks and specifications   + Show comparison chart
DiskSpd - DiskSpd 4k_q32t16_read
min: 261.8     avg: 471.4     median: 505 (6%)     max: 804 MB/s
+ 5 benchmarks and specifications   + Show comparison chart
DiskSpd - DiskSpd seq_write
min: 859     avg: 970     median: 936 (9%)     max: 1166 MB/s
+ 5 benchmarks and specifications   + Show comparison chart
DiskSpd - DiskSpd seq_read
min: 1116     avg: 1360     median: 1403 (17%)     max: 1561 MB/s
+ 5 benchmarks and specifications   + Show comparison chart
DiskSpd - DiskSpd seq_q8t1_write
min: 932     avg: 1011     median: 1013 (7%)     max: 1111 MB/s
+ 5 benchmarks and specifications   + Show comparison chart
DiskSpd - DiskSpd seq_q8t1_read
min: 1687     avg: 1948     median: 1942 (12%)     max: 2302 MB/s
+ 5 benchmarks and specifications   + Show comparison chart
DiskSpd - DiskSpd Loop seq_q8t1_read
min: 1243     avg: 1642     median: 1561 (10%)     max: 1990 MB/s
+ 5 benchmarks and specifications   + Show comparison chart
010020030040050060070080090010001100120013001400150016001700180019002000Tooltip
- Range of benchmark values
red legend - Average benchmark values
* Smaller numbers mean a higher performance

Amazon Logo
  • Samsung PM9A1 MZ-VL21T100 1TB PCIe 4.0 NVMe 2280 Solid State Drive, 7000MB/s Read, 5200MB/s Write, 1000K IOPS Ran. Read, 850K IOPS Ran. Write - PM9A1

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v1.35
log 22. 13:13:10

#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 +0.005s ... 0.008s

#5 did output specs +0s ... 0.008s

#6 getting avg benchmarks for device 3544 +0.027s ... 0.035s

#7 got single benchmarks 3544 +0.014s ... 0.048s

#8 got avg benchmarks for devices +0s ... 0.048s

#9 min, max, avg, median took s +3.609s ... 3.657s

#10 return log +0.551s ... 4.207s

Notebook reviews with Samsung PM991 MZVLQ256HAJD

Samsung Galaxy Book Pro 360 15-inch Convertible review

Samsung Galaxy Book Pro 360 15-inch Convertible review: larger footprint, more power

With the sleek Galaxy Book Pro 360, Samsung combines great build quality with a host of desirable features. The convertible's performance and S Pen make it a good choice for daily productivity tasks despite the thin design. During testing, the 2-in-1 did suffer from poor heat dissipation at times.
Intel Core i5-1135G7, Iris Xe G7 80EUs, 15.6", 1.4 kg
Fujitsu Lifebook A3510 review: An affordable office laptop with a maintenance flap

Fujitsu Lifebook A3510 review: An affordable office laptop with a maintenance flap

The Lifebook A3510 produces relatively low emissions, does not have a lot of weight (1.8 kg, ~4 lb) and also includes a DVD drive onboard. The operating system is Windows 10 Pro with the ability to upgrade to Windows 11. A positive feature is a maintenance flap that gives access to the SSD, RAM, and battery.
Intel Core i3-1005G1, UHD Graphics G1 (Ice Lake 32 EU), 15.6", 1.8 kg
Samsung Galaxy Book Pro 360 13" in review: Samsung's new business class for convertibles

Samsung Galaxy Book Pro 360 13" in review: Samsung's new business class for convertibles

is the Samsung Galaxy Book Pro 360 13 with up to 31 hours on battery power. The 3-in-1 laptop weighing just over one kilogram (~2.2 lb) is also well equipped. However, the developers had to make some restrictions in terms of cooling for the slim design.
Intel Core i5-1135G7, Iris Xe G7 80EUs, 13.2", 1.1 kg
HP EliteBook 845 G7 with AMD Ryzen 5 PRO 4650U

HP EliteBook 845 G7 review: AMD laptop is also better with Ryzen 5 than with Intel

With the Ryzen 5 PRO, the 14-incher goes full throttle and outclasses the top models from Intel. In addition, it offers great runtimes, a low noise level, and excellent maintenance options. However, it doesn't manage to achieve the subnotebook-megastar status because of the display.
AMD Ryzen 5 PRO 4650U, Vega 6, 14", 1.5 kg
HP 250 G7 in review: Scrap recycling done the HP way

HP 250 G7 in review: Scrap recycling done the HP way

The HP 250 G7 offers a current Ice Lake processor, a GeForce graphics core, 8 GB of RAM, and an NVMe SSD for just under 500 Euros (~$596). The built-in display is a disappointment.
Intel Core i5-1035G1, NVIDIA GeForce MX110, 15.6", 1.8 kg

HP EliteBook 845 G7-23Y60EA: AMD Ryzen 5 PRO 4650U AMD Radeon RX Vega 6 (Ryzen 4000/5000), 14.00", 1.5 kg
  External Review » HP EliteBook 845 G7-23Y60EA

Samsung Galaxy Book Pro 360 13: Intel Core i5-1135G7 Intel Iris Xe Graphics G7 80EUs, 13.20", 1.1 kg
  External Review » Samsung Galaxy Book Pro 360 13

Fujitsu Lifebook A3510 (FPC04905BP): Intel Core i3-1005G1 Intel UHD Graphics G1 (Ice Lake 32 EU), 15.60", 1.8 kg
   » Fujitsu Lifebook A3510: With Power Delivery, maintenance cover, and DVD burner

HP EliteBook 845 G7-23Y60EA: AMD Ryzen 5 PRO 4650U AMD Radeon RX Vega 6 (Ryzen 4000/5000), 14.00", 1.5 kg
   » HP EliteBook 845 G7: Top laptop suffers from too dim display

HP 250 G7-15S40ES: Intel Core i5-1035G1 NVIDIA GeForce MX110, 15.60", 1.8 kg
   » No recommendation for the HP 250 G7, wrong display choice

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Klaus Hinum (Update: 2021-09-17)