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Dual NVME drives Lowering Sequential Write Speed

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Posted · Original PosterOP

Have a build that has been running great for about a month now with a single 1tb drive.  I just put in a second one and ran the https://www.userbenchmark.com/ test and my primary drive dropped considerably in sequential write speeds (everything else was untouched)


Build Details:

Gigabyte X570 AORUS PRO WIFI

Ryzen 3700x

G.SKILL F4 DDR4 3600 C16 2x16GB


2 x  Sabrent Rocket Q 1TB NVMe PCIe M.2 2280 Internal SSD High Performance Solid State Drive R/W 3200/2000MB/s (SB-RKTQ-1TB)



Drive C: (placed in the M2A Slot) has been benchmarking at 1700 MBps sustained write speeds until today.  Now it is showing at 200 MBps.  Drive D: (M2B slot) is humming along just fine at 1700.  Doesnt seem to affect any of the random write speeds so I'm unlikely to actually notice this in my day to day but the drop from a "UFO" class desktop to a "Nuclear Submarine" has hurt me right in the feels.  


Drivers are up to date.  Any help would be appreciated.


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Try a different benchmark first and then post a screenshots of the results.



Userbenchmark is unreliable junk.


Some Wallpapers I created • The Basics of Solid State Drives and Modules (A reference guide by me)


In case of USB confusion, refer to this sh*t.

  • 05Gb/s - USB 3.2 Gen 1 (USB 3.0)
  • 10Gb/s - USB 3.2 Gen 2
  • 20Gb/s - USB 3.2 Gen 2x2
  • 40Gb/s - Thunderbolt 3
  • 40Gb/s certified - Thunderbolt 4
  • 40Gb/s - USB 4


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Forget about UserBenchMark.

Run CrystalDiskMark and tell me what you see.

@BlueScope819 so I can see your post


My name is Legion 'Murica Parrot Gang, for we are many.

If a design is taking too long, the design is wrong, and therefore, the design must be modified to accelerate progress. -Elon

Mentioned in 8/5/2020 TechLinked

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