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YMTC PC42Q512GBG4Q

PC42Q512GBG4Q

The Yangtze Memory PC42Q512GBG4Q is an M.2 PCIe 4 NVMe SSD that debuted in early March 2025. With a capacity of 512 GB, the 3D QLC-powered drive promises sequential read speeds of up to 5.3 GB with writes up to 4.6 GB/s. We first tested the 22 by 42 version in June 2026; a 22 by 80 version is available as well.

YMTC promises lower-than-usual power consumption figures. At 150 TBW, projected reliability is average a best.

Performance

In Notebookcheck's tests with AS SSD, the drive delivered unimpressive sequential read and write rates of 3.95 GB/s and 2.51 GB/s, respectively. Throttling was plentiful as well, with very noticeable dips in DiskSpd read stress test.

TypeSSD
SizeM.2 2242
Capacity512 GB
InterfaceNVMe
Announced13.03.2025
LinkYMTC PC42Q512GBG4Q

Benchmarks

Performance Rating - DiskSpd
28 pt (32%)
Seagate ST1000LM014 Solid State Hybrid Drive
0.717 -97%
...
Phison PS5019-E19 SSO1TBITC4-E19-V7
27.6 -1%
Western Digital PC SN5000S SDEPMSJ-512G
27.6 -1%
WDC PC SN730 SDBPNTY-1T00
27.6 -1%
2x Kingston OM8PGP4256Q-A0 (RAID 0)
27.7 -1%
Kioxia BG5 KBG5AZNV1T02
27.7 -1%
SK hynix PVC10 HFS256GEM4X182N
27.7 -1%
GOFATOO P110E-512GB
27.7 -1%
Samsung PM9C1a MZAL81T0HDLB
27.7 -1%
Phison E12S-2TB-Phison-SSD-BICS4
27.8 -1%
YMTC PC42Q512GBG4Q
28
SK Hynix PC601 1TB HFS001TD9TNG
28.1 0%
Kingston NV2 500GB SNV2S/500G
28.1 0%
Phison 1 TB ESR01TBTCCZ-27J
28.1 0%
Micron 2450 512GB MTFDKBA512TFK
28.2 1%
Seagate FireCuda 520 SSD ZP1000GM30002
28.2 1%
Micron 3500 1TB MTFDKBA1T0TGD
28.2 1%
Kingston OM8TAP41024K1-A00
28.3 1%
ESR512GTLG-E6GBTNB4
28.4 1%
Kioxia BG6 KBG6AZNV1T02
28.4 1%
...
Kingston Fury Renegade G5 4TB
87.8 214%
0%
100%
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AS SSD - Copy Game
1374 MB/s (23%)
+ 1 benchmarks and specifications   + Show comparison chart
AS SSD - Copy Program
522 MB/s (19%)
+ 1 benchmarks and specifications   + Show comparison chart
AS SSD - Copy ISO
1793 MB/s (7%)
+ 1 benchmarks and specifications   + Show comparison chart
AS SSD - Score Total
2909 Points (18%)
+ 1 benchmarks and specifications   + Show comparison chart
AS SSD - Score Write
1446 Points (20%)
+ 1 benchmarks and specifications   + Show comparison chart
AS SSD - Score Read
1008 Points (16%)
+ 1 benchmarks and specifications   + Show comparison chart
AS SSD - Access Time Write *
0.1 ms (0%)
+ 1 benchmarks and specifications   + Show comparison chart
AS SSD - Access Time Read *
0.1 ms (0%)
+ 1 benchmarks and specifications   + Show comparison chart
AS SSD - 4K-64 Write
1075 MB/s (18%)
+ 1 benchmarks and specifications   + Show comparison chart
AS SSD - 4K-64 Read
569 MB/s (11%)
+ 1 benchmarks and specifications   + Show comparison chart
AS SSD - 4K Write
119.6 MB/s (23%)
+ 1 benchmarks and specifications   + Show comparison chart
AS SSD - 4K Read
44.7 MB/s (14%)
+ 1 benchmarks and specifications   + Show comparison chart
AS SSD - Sequential Write
2514 MB/s (22%)
+ 1 benchmarks and specifications   + Show comparison chart
AS SSD - Sequential Read
3950 MB/s (31%)
+ 1 benchmarks and specifications   + Show comparison chart
DiskSpd - DiskSpd 4k_q1t1_write
181.5 MB/s (42%)
+ 1 benchmarks and specifications   + Show comparison chart
DiskSpd - DiskSpd 4k_q1t1_read
41.6 MB/s (12%)
+ 1 benchmarks and specifications   + Show comparison chart
DiskSpd - DiskSpd 4k_q32t16_write
489 MB/s (7%)
+ 1 benchmarks and specifications   + Show comparison chart
DiskSpd - DiskSpd 4k_q32t16_read
610 MB/s (7%)
+ 1 benchmarks and specifications   + Show comparison chart
DiskSpd - DiskSpd seq_write
3106 MB/s (30%)
+ 1 benchmarks and specifications   + Show comparison chart
DiskSpd - DiskSpd seq_read
3228 MB/s (34%)
+ 1 benchmarks and specifications   + Show comparison chart
DiskSpd - DiskSpd seq_q8t1_write
4594 MB/s (32%)
+ 1 benchmarks and specifications   + Show comparison chart
DiskSpd - DiskSpd seq_q8t1_read
4987 MB/s (31%)
+ 1 benchmarks and specifications   + Show comparison chart
DiskSpd - DiskSpd Loop seq_q8t1_read
3951 MB/s (24%)
+ 1 benchmarks and specifications   + Show comparison chart
0100200300400500600700800900100011001200130014001500160017001800190020002100220023002400250026002700280029003000310032003300340035003600370038003900400041004200430044004500Tooltip
- Range of benchmark values
red legend - Average benchmark values
* Smaller numbers mean a higher performance

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#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, 02 Jul 2026 08:40:30 +0200 +0.005s ... 0.005s

#4 composed specs +0.005s ... 0.01s

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

#6 getting avg benchmarks for device 4373 +0.035s ... 0.045s

#7 got single benchmarks 4373 +0.004s ... 0.049s

#8 got avg benchmarks for devices +0s ... 0.049s

#9 min, max, avg, median took s +3.077s ... 3.126s

#10 return log +0.33s ... 3.456s

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Klaus Hinum (Update: 2026-06-29)