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WD PC SN740 512GB SDDPMQD-512G-1101 vs Samsung PM991a MZ9LQ512HBLU-00BD1

WD PC SN740 512GB SDDPMQD-512G-1101

► remove from comparison SN740 512GB

The Western Digital WD PC SN740 512 GB (SDDPMQD-512G-1101) is a fast mid-range M.2 2242 NVMe SSD.

Samsung PM991a MZ9LQ512HBLU-00BD1

► remove from comparison MZ9LQ512HBLU

The Samsung PM991a MZ9LQ512HBLU-00BD1 is a small PCIe NVMe SSD in the M.2 2230 form factor. 

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WD PC SN740 512GB SDDPMQD-512G-1101Samsung PM991a MZ9LQ512HBLU-00BD1
TypeSSDSSD
SizeM.2 2242M.2 2230
Capacity512 GB512 GB
InterfaceNVMeNVMe
Announced02.03.2023 02.10.2021

Benchmarks

Performance Rating - DiskSpd - SN740 512GB
27.1 pt (31%)
Seagate ST1000LM014 Solid State Hybrid Drive
0.719 -97%
...
Samsung SSD PM981 MZVLB1T0HALR
26.5 -2%
YMTC PC300-1TB
26.5 -2%
Intel SSD 760p SSDPEKKW010T8
26.5 -2%
Samsung SSD PM981 MZVLB2T0HMLB
26.5 -2%
Kingston OM8PGP42048N-A0
26.6 -2%
Western Digital PC SN5000S SDEQNSJ-1T00
26.7 -1%
Samsung PM981a MZVLB1T0HBLR
26.8 -1%
Rayson RS1D0TSSD710 1024 GB PCIe 4.0 NVMe
26.8 -1%
Kingston OM8SEP1024Q-A0
26.9 -1%
WD PC SN740 512GB SDDPMQD-512G-1101
27.1
Rayson RS512GSSD710 512 GB PCIe 4.0 NVMe
27.1 0%
WD PC SN740 512GB SDDQMQD-512G
27.2 0%
Samsung PM9C1a MZAL8512HDLU
27.3 1%
Acer Predator SSD GM7000 2TB
27.3 1%
ADATA XPG Gammix S70 Blade 2TB
27.4 1%
WD PC SN560 SDDPNQE-1T00
27.4 1%
Micron 2550 1TB
27.5 1%
SK hynix PC801 HFS512GEJ9X162N
27.6 2%
WDC PC SN730 SDBPNTY-1T00
27.6 2%
...
Kingston Fury Renegade G5
88.1 225%
0%
100%
Restrict / Search: Model: Max. age: years
Performance Rating - DiskSpd - MZ9LQ512HBLU
23.2 pt (26%)
Seagate ST1000LM014 Solid State Hybrid Drive
0.719 -97%
...
YMTC PC005 Active 512GB
22.7 -2%
Micron 2450 512GB MTFDKCD512TFK
22.8 -2%
Transcend M.2 SSD 2200S TS512GMTE220S
22.8 -2%
Samsung MZ9L4512HBLU-00BMV
22.8 -2%
Netac NS512GSSD530
22.9 -1%
Toshiba KBG40ZNV512G
22.9 -1%
2x Intel SSD 660p SSDPEKNW512G8 (RAID 0)
23 -1%
Authorain NV900-1T
23 -1%
Lexar NM620 512GB
23.1 0%
Samsung PM991a MZ9LQ512HBLU-00BD1
23.2
BIWIN NS200 512GB CNF82GS1G00-512
23.2 0%
Micron 2400 MTFDKBA1T0QFM
23.2 0%
WDC PC SN730 SDBQNTY-512GB
23.3 0%
Phison PS5013 311CD0512GB
23.3 0%
Kioxia BG6 KBG60ZNS512G
23.3 0%
Kingston OM8SEP4512N-A0
23.3 0%
Samsung SSD PM981 MZVLB512HAJQ
23.4 1%
Kingston SA2000M8500G
23.4 1%
SK Hynix PC711 512GB HFS512GDE9X073N
23.6 2%
...
Kingston Fury Renegade G5
88.1 280%
0%
100%
Restrict / Search: Model: Max. age: years
AS SSD - Copy Game
min: 1679.33     avg: 2005     median: 2088.6 (35%)     max: 2263.19 MB/s
min: 835     avg: 894     median: 854 (14%)     max: 992.77 MB/s
AS SSD - Copy Program
min: 628.01     avg: 847     median: 871.3 (32%)     max: 1041.3 MB/s
min: 281.6     avg: 376.5     median: 300.6 (11%)     max: 547.25 MB/s
AS SSD - Copy ISO
min: 1004.31     avg: 2439     median: 2505.2 (23%)     max: 3266.48 MB/s
min: 1163.3     avg: 1667     median: 1899 (17%)     max: 1938 MB/s
AS SSD - Score Total
min: 2041     avg: 3899     median: 3917 (24%)     max: 5546 Points
min: 2774     avg: 3323     median: 3522 (22%)     max: 3672 Points
AS SSD - Score Write
min: 1026     avg: 1824     median: 1796 (25%)     max: 2496 Points
min: 1091     avg: 1209     median: 1192 (17%)     max: 1345 Points
AS SSD - Score Read
min: 681     avg: 1404     median: 1351 (22%)     max: 2034 Points
min: 1137     avg: 1421     median: 1560 (25%)     max: 1566 Points
AS SSD - Access Time Write *
min: 0.017     avg: 0     median: 0 (0%)     max: 0.071 ms
min: 0.024     avg: 0     median: 0 (0%)     max: 0.044 ms
AS SSD - Access Time Read *
min: 0.064     avg: 0.1     median: 0.1 (0%)     max: 0.195 ms
min: 0.079     avg: 0.1     median: 0.1 (0%)     max: 0.164 ms
AS SSD - 4K-64 Write
min: 675.87     avg: 1393     median: 1353.2 (23%)     max: 1949.21 MB/s
min: 759.51     avg: 899     median: 926 (16%)     max: 1012 MB/s
AS SSD - 4K-64 Read
min: 425.2     avg: 981     median: 877.4 (17%)     max: 1571.21 MB/s
min: 823.86     avg: 1117     median: 1253 (25%)     max: 1273 MB/s
AS SSD - 4K Write
min: 108.1     avg: 181.2     median: 196.6 (38%)     max: 227.17 MB/s
min: 86.7     avg: 131.6     median: 147.8 (29%)     max: 160.19 MB/s
AS SSD - 4K Read
min: 23.79     avg: 55.3     median: 58.9 (19%)     max: 71.29 MB/s
min: 37.8     avg: 44.2     median: 46.8 (15%)     max: 48.12 MB/s
AS SSD - Sequential Write
min: 1908.11     avg: 2500     median: 2413.2 (21%)     max: 3282.76 MB/s
min: 1708.34     avg: 1782     median: 1791 (16%)     max: 1847 MB/s
AS SSD - Sequential Read
min: 2324.14     avg: 3680     median: 3974.4 (31%)     max: 4140.35 MB/s
min: 2555     avg: 2593     median: 2596 (20%)     max: 2629.16 MB/s
CrystalDiskMark 5.2 / 6 - CDM 5/6 Write 4K
min: 104.9     avg: 155.8     median: 144.4 (13%)     max: 253.6 MB/s
min: 119.9     avg: 158.3     median: 170.7 (15%)     max: 184.4 MB/s
CrystalDiskMark 5.2 / 6 - CDM 5/6 Read 4K
min: 20.36     avg: 56.4     median: 59.9 (2%)     max: 82.49 MB/s
min: 45.3     avg: 50.5     median: 52.7 (1%)     max: 53.54 MB/s
CrystalDiskMark 5.2 / 6 - CDM 5 Write Seq
min: 2162     avg: 2822     median: 2914 (16%)     max: 3163 MB/s
min: 1235     avg: 1528     median: 1571 (8%)     max: 1777 MB/s
CrystalDiskMark 5.2 / 6 - CDM 5 Read Seq
min: 2239     avg: 2851     median: 3033 (36%)     max: 3366 MB/s
min: 1686     avg: 1820     median: 1765 (21%)     max: 2009 MB/s
CrystalDiskMark 5.2 / 6 - CDM 5/6 Write 4K Q32T1
min: 223.6     avg: 451.3     median: 433 (9%)     max: 808.8 MB/s
min: 374.3     avg: 458.9     median: 486.3 (10%)     max: 516 MB/s
CrystalDiskMark 5.2 / 6 - CDM 5/6 Read 4K Q32T1
min: 426.2     avg: 622     median: 660.3 (10%)     max: 883.3 MB/s
min: 503     avg: 574     median: 548 (8%)     max: 671 MB/s
CrystalDiskMark 5.2 / 6 - CDM 5/6 Write Seq Q32T1
min: 2702     avg: 3416     median: 3560 (24%)     max: 3855 MB/s
min: 1201     avg: 1557     median: 1553 (10%)     max: 1918 MB/s
CrystalDiskMark 5.2 / 6 - CDM 5/6 Read Seq Q32T1
min: 4227     avg: 4735     median: 4820 (26%)     max: 5003 MB/s
min: 2216     avg: 2815     median: 3113 (17%)     max: 3115 MB/s
DiskSpd - DiskSpd 4k_q1t1_write
min: 97.6     avg: 162     median: 148.7 (34%)     max: 261 MB/s
min: 104     avg: 157.5     median: 183 (42%)     max: 185.5 MB/s
DiskSpd - DiskSpd 4k_q1t1_read
min: 47.6     avg: 62.2     median: 62.3 (18%)     max: 72.2 MB/s
min: 41.9     avg: 48.2     median: 49.3 (14%)     max: 53.4 MB/s
DiskSpd - DiskSpd 4k_q32t16_write
min: 267     avg: 1103     median: 571.5 (9%)     max: 2871 MB/s
min: 858     avg: 994     median: 1047 (17%)     max: 1078 MB/s
DiskSpd - DiskSpd 4k_q32t16_read
min: 442     avg: 1219     median: 1069 (13%)     max: 1943 MB/s
min: 871     avg: 1208     median: 1362 (17%)     max: 1390 MB/s
DiskSpd - DiskSpd seq_write
min: 2405     avg: 2906     median: 2832.5 (28%)     max: 3804 MB/s
min: 1620     avg: 1697     median: 1706 (17%)     max: 1766 MB/s
DiskSpd - DiskSpd seq_read
min: 2557     avg: 2878     median: 2713 (35%)     max: 4132 MB/s
min: 1476     avg: 1784     median: 1873 (24%)     max: 2002 MB/s
DiskSpd - DiskSpd seq_q8t1_write
min: 2774     avg: 3403     median: 3456 (24%)     max: 3894 MB/s
min: 1188     avg: 1575     median: 1745 (12%)     max: 1791 MB/s
DiskSpd - DiskSpd seq_q8t1_read
min: 3717     avg: 4728     median: 4853.5 (30%)     max: 5068 MB/s
min: 2133     avg: 2711     median: 2971 (18%)     max: 3028 MB/s
DiskSpd - DiskSpd Loop seq_q8t1_read
min: 2347     avg: 3979     median: 4064 (25%)     max: 4933 MB/s
min: 1772     avg: 1876     median: 1871 (11%)     max: 1986 MB/s

Average Benchmarks WD PC SN740 512GB SDDPMQD-512G-1101 → 100% n=31

Average Benchmarks Samsung PM991a MZ9LQ512HBLU-00BD1 → 82% n=31

- Range of benchmark values for this graphics card
red legend - Average benchmark values for this graphics card
* Smaller numbers mean a higher performance
1 This benchmark is not used for the average calculation

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v1.33
log 19. 09:06:10

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

#1 checking url part for id 3953 +0s ... 0s

#2 checking url part for id 3725 +0s ... 0s

#3 redirected to Ajax server, took 1758265570s time from redirect:0 +0s ... 0s

#4 did not recreate cache, as it is less than 5 days old! Created at Sun, 14 Sep 2025 19:55:38 +0200 +0s ... 0s

#5 composed specs +0.003s ... 0.003s

#6 did output specs +0s ... 0.003s

#7 getting avg benchmarks for device 3953 +0.007s ... 0.011s

#8 got single benchmarks 3953 +0.008s ... 0.019s

#9 getting avg benchmarks for device 3725 +0.004s ... 0.022s

#10 got single benchmarks 3725 +0.003s ... 0.026s

#11 got avg benchmarks for devices +0s ... 0.026s

#12 min, max, avg, median took s +0.114s ... 0.14s

#13 return log +0s ... 0.14s

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> Expert Reviews and News on Laptops, Smartphones and Tech Innovations > Benchmarks / Tech > HDD/SSD Comparison - Head 2 Head
Redaktion, 2017-09- 8 (Update: 2023-07- 1)