WD Blue 3D NAND 500GB PC SSD Poor Speeds

Looking for advice.
Should I return this drive for a replacement?
Just bought it a couple of days ago and Crystal Disk Mark is showing speeds way below advertised.
Not much better than the 3.5 year old Sandisk it replaced and that drive still has 97% health.

Thanks

CrystalDiskMark 6.0.0 x64 © 2007-2017 hiyohiyo
Crystal Dew World : https://crystalmark.info/

  • MB/s = 1,000,000 bytes/s [SATA/600 = 600,000,000 bytes/s]

  • KB = 1000 bytes, KiB = 1024 bytes

    Sequential Read (Q= 32,T= 1) : 409.285 MB/s
    Sequential Write (Q= 32,T= 1) : 498.718 MB/s
    Random Read 4KiB (Q= 8,T= 8) : 296.522 MB/s [ 72393.1 IOPS]
    Random Write 4KiB (Q= 8,T= 8) : 247.191 MB/s [ 60349.4 IOPS]
    Random Read 4KiB (Q= 32,T= 1) : 224.992 MB/s [ 54929.7 IOPS]
    Random Write 4KiB (Q= 32,T= 1) : 182.101 MB/s [ 44458.3 IOPS]
    Random Read 4KiB (Q= 1,T= 1) : 38.117 MB/s [ 9305.9 IOPS]
    Random Write 4KiB (Q= 1,T= 1) : 88.349 MB/s [ 21569.6 IOPS]

    Test : 1024 MiB [C: 26.9% (125.2/465.8 GiB)] (x5) [Interval=5 sec]
    Date : 2018/05/29 17:35:06
    OS : Windows 7 Ultimate SP1 [6.1 Build 7601] (x64)
    =========================================================

Advertised speeds:

Max Sequential Read Up to 560 MBps
Max Sequential Write Up to 530 MBps
4KB Random Read Up to 95,000 IOPS
4KB Random Write Up to 84,000 IOPS

Just installed WD Blue


CrystalDiskMark 6.0.1 x64 © 2007-2018 hiyohiyo
Crystal Dew World : https://crystalmark.info/

  • MB/s = 1,000,000 bytes/s [SATA/600 = 600,000,000 bytes/s]

  • KB = 1000 bytes, KiB = 1024 bytes

    Sequential Read (Q= 32,T= 1) : 563.385 MB/s
    Sequential Write (Q= 32,T= 1) : 533.384 MB/s
    Random Read 4KiB (Q= 8,T= 8) : 393.710 MB/s [ 96120.6 IOPS]
    Random Write 4KiB (Q= 8,T= 8) : 309.165 MB/s [ 75479.7 IOPS]
    Random Read 4KiB (Q= 32,T= 1) : 379.709 MB/s [ 92702.4 IOPS]
    Random Write 4KiB (Q= 32,T= 1) : 313.532 MB/s [ 76545.9 IOPS]
    Random Read 4KiB (Q= 1,T= 1) : 27.849 MB/s [ 6799.1 IOPS]
    Random Write 4KiB (Q= 1,T= 1) : 49.643 MB/s [ 12119.9 IOPS]

    Test : 1024 MiB [C: 12.1% (56.4/465.2 GiB)] (x5) [Interval=5 sec]
    Date : 2018/10/16 13:00:01
    OS : Windows 10 [10.0 Build 16299] (x64)