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Samsung PM991 MZ9LQ256HBJQ

PM991 MZ9LQ256HBJQ

The Samsung PM991 MZ9LQ256HBJQ is a mid range PCIe M.2 2230 NVMe SSD. It was first found in the Microsoft Surface Pro 7+ and is user replaceable.

TypeSSD
SizeM.2 2230
Capacity256 GB
InterfaceM.2
Announced23.06.2020

Benchmarks

Performance Rating - DiskSpd
14.4 pt (16%)
Seagate ST1000LM014 Solid State Hybrid Drive
0.719 -95%
...
Micron 2200S 256GB
13.8 -4%
Kingston RBUSNS8154P3512GJ1
13.9 -3%
Micron 2200S 512GB
14.1 -2%
Kingston NV2 1000GB SNV2S/1000G
14.1 -2%
ADATA Swordfish 2 TB
14.1 -2%
Micron 3460 256 GB Soldered
14.2 -1%
SK Hynix BC711 1TB HFM001TD3JX016N
14.2 -1%
SK hynix BC511 HFM256GDJTNI-82A0
14.4 0%
Micron 2400 MTFDKBA512QF
14.4 0%
Samsung PM991 MZ9LQ256HBJQ
14.4
Toshiba BG4 KBG40ZNT512G
14.9 3%
WDC PC SN520 SDAPNUW-256G
15 4%
Toshiba KBG30ZMV512G
15.2 6%
SSSTC CA5-8D256
15.2 6%
GSemi AZW GSDFN512TS3F1OGCX
15.5 8%
WDC PC SN530 SDBPMPZ-265G
15.5 8%
Toshiba XG5-P KXG50PNV2T04
15.5 8%
Transcend M.2 SSD 430S TS512GMTS430S
15.5 8%
WDC PC SN530 SDBPTPZ-512G
15.6 8%
...
Kingston Fury Renegade G5
88.1 512%
0%
100%
Restrict / Search: Model: Max. age: years
AS SSD - Copy Game
min: 562     avg: 687     median: 686.5 (11%)     max: 811 MB/s
+ 2 benchmarks and specifications   + Show comparison chart
AS SSD - Copy Program
min: 262.8     avg: 388.9     median: 388.9 (14%)     max: 515 MB/s
+ 2 benchmarks and specifications   + Show comparison chart
AS SSD - Copy ISO
min: 996     avg: 1085     median: 1085 (4%)     max: 1174 MB/s
+ 2 benchmarks and specifications   + Show comparison chart
AS SSD - Score Total
min: 2155     avg: 2386     median: 2385.5 (15%)     max: 2616 Points
+ 2 benchmarks and specifications   + Show comparison chart
AS SSD - Score Write
min: 858     avg: 925     median: 925 (13%)     max: 992 Points
+ 2 benchmarks and specifications   + Show comparison chart
AS SSD - Score Read
min: 885     avg: 989     median: 989 (16%)     max: 1093 Points
+ 2 benchmarks and specifications   + Show comparison chart
AS SSD - Access Time Write *
min: 0.028     avg: 0     median: 0 (0%)     max: 0.035 ms
+ 2 benchmarks and specifications   + Show comparison chart
AS SSD - Access Time Read *
min: 0.179     avg: 0.2     median: 0.2 (1%)     max: 0.279 ms
+ 2 benchmarks and specifications   + Show comparison chart
AS SSD - 4K-64 Write
min: 680     avg: 721     median: 721 (12%)     max: 762 MB/s
+ 2 benchmarks and specifications   + Show comparison chart
AS SSD - 4K-64 Read
min: 676     avg: 773     median: 773 (15%)     max: 870 MB/s
+ 2 benchmarks and specifications   + Show comparison chart
AS SSD - 4K Write
min: 110.3     avg: 123.6     median: 123.6 (24%)     max: 136.9 MB/s
+ 2 benchmarks and specifications   + Show comparison chart
AS SSD - 4K Read
min: 40.1     avg: 45.1     median: 45.1 (14%)     max: 50.1 MB/s
+ 2 benchmarks and specifications   + Show comparison chart
AS SSD - Sequential Write
min: 675     avg: 803     median: 803 (7%)     max: 931 MB/s
+ 2 benchmarks and specifications   + Show comparison chart
AS SSD - Sequential Read
min: 1687     avg: 1706     median: 1706 (13%)     max: 1725 MB/s
+ 2 benchmarks and specifications   + Show comparison chart
CrystalDiskMark 5.2 / 6 - CDM 5/6 Write 4K
min: 78.8     avg: 122.1     median: 122.1 (11%)     max: 165.3 MB/s
+ 2 benchmarks and specifications   + Show comparison chart
CrystalDiskMark 5.2 / 6 - CDM 5/6 Read 4K
min: 27.88     avg: 35.4     median: 35.4 (1%)     max: 42.95 MB/s
+ 2 benchmarks and specifications   + Show comparison chart
CrystalDiskMark 5.2 / 6 - CDM 5 Write Seq
min: 742     avg: 849     median: 848.5 (5%)     max: 955 MB/s
+ 2 benchmarks and specifications   + Show comparison chart
CrystalDiskMark 5.2 / 6 - CDM 5 Read Seq
min: 841     avg: 854     median: 854 (10%)     max: 867 MB/s
+ 2 benchmarks and specifications   + Show comparison chart
CrystalDiskMark 5.2 / 6 - CDM 5/6 Write 4K Q32T1
min: 363.5     avg: 393.5     median: 393.5 (8%)     max: 423.5 MB/s
+ 2 benchmarks and specifications   + Show comparison chart
CrystalDiskMark 5.2 / 6 - CDM 5/6 Read 4K Q32T1
min: 317.6     avg: 398.4     median: 398.4 (6%)     max: 479.2 MB/s
+ 2 benchmarks and specifications   + Show comparison chart
CrystalDiskMark 5.2 / 6 - CDM 5/6 Write Seq Q32T1
min: 1057     avg: 1059     median: 1058.5 (7%)     max: 1060 MB/s
+ 2 benchmarks and specifications   + Show comparison chart
CrystalDiskMark 5.2 / 6 - CDM 5/6 Read Seq Q32T1
min: 2251     avg: 2254     median: 2253.5 (12%)     max: 2256 MB/s
+ 2 benchmarks and specifications   + Show comparison chart
DiskSpd - DiskSpd 4k_q1t1_write
min: 106     avg: 136.5     median: 136.5 (31%)     max: 167 MB/s
+ 2 benchmarks and specifications   + Show comparison chart
DiskSpd - DiskSpd 4k_q1t1_read
min: 40.4     avg: 43.8     median: 43.8 (13%)     max: 47.1 MB/s
+ 2 benchmarks and specifications   + Show comparison chart
DiskSpd - DiskSpd 4k_q32t16_write
min: 278     avg: 371     median: 371 (6%)     max: 464 MB/s
+ 2 benchmarks and specifications   + Show comparison chart
DiskSpd - DiskSpd 4k_q32t16_read
min: 583     avg: 585     median: 584.5 (7%)     max: 586 MB/s
+ 2 benchmarks and specifications   + Show comparison chart
DiskSpd - DiskSpd seq_write
min: 855     avg: 901     median: 901 (9%)     max: 947 MB/s
+ 2 benchmarks and specifications   + Show comparison chart
DiskSpd - DiskSpd seq_read
min: 890     avg: 898     median: 897.5 (12%)     max: 905 MB/s
+ 2 benchmarks and specifications   + Show comparison chart
DiskSpd - DiskSpd seq_q8t1_write
min: 1002     avg: 1039     median: 1039 (7%)     max: 1076 MB/s
+ 2 benchmarks and specifications   + Show comparison chart
DiskSpd - DiskSpd seq_q8t1_read
min: 1989     avg: 2068     median: 2068 (13%)     max: 2147 MB/s
+ 2 benchmarks and specifications   + Show comparison chart
DiskSpd - DiskSpd Loop seq_q8t1_read
min: 2184     avg: 2188     median: 2188 (13%)     max: 2192 MB/s
+ 2 benchmarks and specifications   + Show comparison chart
- Range of benchmark values
red legend - Average benchmark values
* Smaller numbers mean a higher performance

Add one or more devices and compare

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v1.35
log 07. 05:08:57

#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 Mon, 03 Nov 2025 23:29:02 +0100 +0.001s ... 0.001s

#4 composed specs +0.004s ... 0.005s

#5 did output specs +0s ... 0.005s

#6 getting avg benchmarks for device 3633 +0.015s ... 0.02s

#7 got single benchmarks 3633 +0.007s ... 0.027s

#8 got avg benchmarks for devices +0s ... 0.027s

#9 min, max, avg, median took s +0.835s ... 0.862s

#10 return log +0.001s ... 0.863s

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Klaus Hinum (Update: 2021-03-17)