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Samsung PM991a MZALQ512HBLU

MZALQ512HBLU

The 512 GB Samsung SSD PM991a or MZALQ512HBLU is a PCIe 3.0 x4 based, M.2 2242 type solid state drive. The NVMe drive's transfer rates are mid-tier by H1 2021 standards.

TypeSSD
SizeM.2 2242
Capacity512 GB
InterfaceNVMe
Announced13.12.2021

Benchmarks

Performance Rating - DiskSpd
19.9 pt (23%)
Seagate ST1000LM014 Solid State Hybrid Drive
0.687 -97%
...
Samsung SSD PM981a MZVLB256HBHQ
19.6 -2%
Samsung PM981a MZVLB2T0HALB
19.6 -2%
256 GB UFS 4.0 Flash
19.7 -1%
Toshiba XG6 KXG6AZNV256G
19.7 -1%
WDC PC SN530 SDBPNPZ-512G
19.9 0%
ESO512GYLCT
19.9 0%
SK Hynix BC711 HFM512GD3HX015N
19.9 0%
Phison E12S-512GB-Phison-SSD-BICS4
19.9 0%
SSTC CL4-3D512-Q11
19.9 0%
Samsung PM991a MZALQ512HBLU
19.9
Kioxia BG5 KBG50ZNV512G
20 1%
Foresee XP1000F512G
20.1 1%
SK Hynix HFM512GD3JX013N
20.1 1%
Samsung SSD PM981 MZVLB256HAHQ
20.1 1%
Kingston SA2000M81000G
20.2 2%
ADATA XPG SX8200 Pro (ASX8200PNP-512GT)
20.2 2%
Kingston NV1 SNVS/500GCN
20.3 2%
Lexar NM610 1TB
20.3 2%
Kingston OM8PCP31024F
20.3 2%
...
Kingston Fury Renegade G5 8TB
88.2 343%
0%
100%
Restrict / Search: Model: Max. age: years
AS SSD - Copy Game
min: 567     avg: 966     median: 857 (14%)     max: 1475 MB/s
+ 3 benchmarks and specifications   + Show comparison chart
AS SSD - Copy Program
min: 195.9     avg: 340.3     median: 310 (12%)     max: 515 MB/s
+ 3 benchmarks and specifications   + Show comparison chart
AS SSD - Copy ISO
min: 1438     avg: 1574     median: 1521 (6%)     max: 1762.9 MB/s
+ 3 benchmarks and specifications   + Show comparison chart
AS SSD - Score Total
min: 2863     avg: 3072     median: 3116 (19%)     max: 3191 Points
+ 4 benchmarks and specifications   + Show comparison chart
AS SSD - Score Write
min: 1140     avg: 1216     median: 1217 (17%)     max: 1289 Points
+ 4 benchmarks and specifications   + Show comparison chart
AS SSD - Score Read
min: 1168     avg: 1259     median: 1281 (20%)     max: 1307 Points
+ 4 benchmarks and specifications   + Show comparison chart
AS SSD - Access Time Write *
min: 0.029     avg: 0.1     median: 0.1 (0%)     max: 0.101 ms
+ 4 benchmarks and specifications   + Show comparison chart
AS SSD - Access Time Read *
min: 0.086     avg: 0.1     median: 0.1 (0%)     max: 0.194 ms
+ 4 benchmarks and specifications   + Show comparison chart
AS SSD - 4K-64 Write
min: 848.57     avg: 933     median: 933.3 (16%)     max: 1016 MB/s
+ 4 benchmarks and specifications   + Show comparison chart
AS SSD - 4K-64 Read
min: 858.11     avg: 947     median: 968.5 (19%)     max: 994.27 MB/s
+ 4 benchmarks and specifications   + Show comparison chart
AS SSD - 4K Write
min: 113.5     avg: 125.9     median: 128.9 (25%)     max: 132.4 MB/s
+ 4 benchmarks and specifications   + Show comparison chart
AS SSD - 4K Read
min: 43.59     avg: 44.6     median: 44.7 (14%)     max: 45.38 MB/s
+ 4 benchmarks and specifications   + Show comparison chart
AS SSD - Sequential Write
min: 1364     avg: 1569     median: 1610 (14%)     max: 1691.36 MB/s
+ 4 benchmarks and specifications   + Show comparison chart
AS SSD - Sequential Read
min: 2635     avg: 2672     median: 2663.8 (21%)     max: 2725 MB/s
+ 4 benchmarks and specifications   + Show comparison chart
CrystalDiskMark 3.0 - 4K QD32 Write
276.5 MB/s (26%)
+ 1 benchmarks and specifications   + Show comparison chart
CrystalDiskMark 3.0 - 4K QD32 Read
504 MB/s (39%)
+ 1 benchmarks and specifications   + Show comparison chart
CrystalDiskMark 3.0 - 4K Write
142.5 MB/s (5%)
+ 1 benchmarks and specifications   + Show comparison chart
CrystalDiskMark 3.0 - 4K Read
39.2 MB/s (1%)
+ 1 benchmarks and specifications   + Show comparison chart
CrystalDiskMark 3.0 - 512K Write
1212 MB/s (13%)
+ 1 benchmarks and specifications   + Show comparison chart
CrystalDiskMark 3.0 - 512K Read
1617 MB/s (34%)
+ 1 benchmarks and specifications   + Show comparison chart
CrystalDiskMark 3.0 - Sequential Write
1591 MB/s (15%)
+ 1 benchmarks and specifications   + Show comparison chart
CrystalDiskMark 3.0 - Sequential Read
1975 MB/s (22%)
+ 1 benchmarks and specifications   + Show comparison chart
CrystalDiskMark 5.2 / 6 - CDM 5/6 Write 4K
min: 136.5     avg: 139.8     median: 139.8 (13%)     max: 143.1 MB/s
+ 2 benchmarks and specifications   + Show comparison chart
CrystalDiskMark 5.2 / 6 - CDM 5/6 Read 4K
min: 47.89     avg: 48.5     median: 48.5 (1%)     max: 49.06 MB/s
+ 2 benchmarks and specifications   + Show comparison chart
CrystalDiskMark 5.2 / 6 - CDM 5 Write Seq
min: 1522     avg: 1559     median: 1558.5 (8%)     max: 1595 MB/s
+ 2 benchmarks and specifications   + Show comparison chart
CrystalDiskMark 5.2 / 6 - CDM 5 Read Seq
min: 1856     avg: 1933     median: 1933 (22%)     max: 2010 MB/s
+ 2 benchmarks and specifications   + Show comparison chart
CrystalDiskMark 5.2 / 6 - CDM 5/6 Write 4K Q32T1
min: 349.8     avg: 396.1     median: 396.1 (8%)     max: 442.3 MB/s
+ 2 benchmarks and specifications   + Show comparison chart
CrystalDiskMark 5.2 / 6 - CDM 5/6 Read 4K Q32T1
min: 459.9     avg: 506     median: 506.5 (7%)     max: 553 MB/s
+ 2 benchmarks and specifications   + Show comparison chart
CrystalDiskMark 5.2 / 6 - CDM 5/6 Write Seq Q32T1
min: 1605     avg: 1615     median: 1615 (11%)     max: 1625 MB/s
+ 2 benchmarks and specifications   + Show comparison chart
CrystalDiskMark 5.2 / 6 - CDM 5/6 Read Seq Q32T1
min: 2680     avg: 2683     median: 2683 (14%)     max: 2686 MB/s
+ 2 benchmarks and specifications   + Show comparison chart
CrystalDiskMark 5.2 / 6 - CDM 6 Write 4K Q8T8
1190 MB/s (24%)
+ 1 benchmarks and specifications   + Show comparison chart
CrystalDiskMark 5.2 / 6 - CDM 6 Read 4K Q8T8
1057 MB/s (16%)
+ 1 benchmarks and specifications   + Show comparison chart
DiskSpd - DiskSpd 4k_q1t1_write
min: 133     avg: 138.8     median: 139.1 (32%)     max: 144 MB/s
+ 4 benchmarks and specifications   + Show comparison chart
DiskSpd - DiskSpd 4k_q1t1_read
min: 47.3     avg: 47.8     median: 47.8 (14%)     max: 48.3 MB/s
+ 4 benchmarks and specifications   + Show comparison chart
DiskSpd - DiskSpd 4k_q32t16_write
min: 1094     avg: 1162     median: 1176 (17%)     max: 1200 MB/s
+ 4 benchmarks and specifications   + Show comparison chart
DiskSpd - DiskSpd 4k_q32t16_read
min: 1032     avg: 1060     median: 1063.5 (13%)     max: 1079 MB/s
+ 4 benchmarks and specifications   + Show comparison chart
DiskSpd - DiskSpd seq_write
min: 1546     avg: 1578     median: 1580.5 (15%)     max: 1604 MB/s
+ 4 benchmarks and specifications   + Show comparison chart
DiskSpd - DiskSpd seq_read
min: 1824     avg: 1936     median: 1965.5 (23%)     max: 1989 MB/s
+ 4 benchmarks and specifications   + Show comparison chart
DiskSpd - DiskSpd seq_q8t1_write
min: 1564     avg: 1586     median: 1591.5 (11%)     max: 1597 MB/s
+ 4 benchmarks and specifications   + Show comparison chart
DiskSpd - DiskSpd seq_q8t1_read
min: 2520     avg: 2612     median: 2632 (16%)     max: 2665 MB/s
+ 4 benchmarks and specifications   + Show comparison chart
DiskSpd - DiskSpd Loop seq_q8t1_read
min: 2524     avg: 2565     median: 2555.5 (16%)     max: 2624 MB/s
+ 4 benchmarks and specifications   + Show comparison chart
010020030040050060070080090010001100120013001400150016001700180019002000210022002300240025002600Tooltip
- Range of benchmark values
red legend - Average benchmark values
* Smaller numbers mean a higher performance

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v1.35
log 23. 08:18:58

#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 Thu, 19 Mar 2026 04:00:04 +0100 +0.004s ... 0.004s

#4 composed specs +0.006s ... 0.01s

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

#6 getting avg benchmarks for device 3762 +0.02s ... 0.03s

#7 got single benchmarks 3762 +0.01s ... 0.04s

#8 got avg benchmarks for devices +0s ... 0.04s

#9 min, max, avg, median took s +4.23s ... 4.271s

#10 return log +0.123s ... 4.394s

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Klaus Hinum (Update: 2021-12-13)