Surface book 2 15 inch 256G super low wirte speed

My surface book 2 (15 inch, i7, 16G, 256G ssd) shows high read speed (~3000 mb/s), but super low write speed (~330 mb/s).  I returned my 1st one due to this super low write speed, but 2nd one also show almost same benchmark speed. Based on other reviews, these numbers are consistently reported in 256G ssd model. I wonder if this write speed is normal or it can be improved by firmware update later. If this write speed is normal...why MS used this ssd?. 300mb/s write speed is much slower than my 2yr old surface pro 4 256G (~1000mb/s) and 3yr old 256G ssd(~800mb/s) in my desktop....

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What tool are you using to measure the speed?

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I used CrystalDiskMark 6.0.0

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My 256G SSD is samsung MZFLW256HEHP-000MV.

My surfpace pro 4 has a Toshiba 256G SDD. Below is today's result (show only sequential writing reult).

1. Surface book 2 256G : Read 2494.1 MB/s, Write 338.7 MB/s

2. Surface Pro 4 256G    : Read 1616.3 MB/s, Write 942.2 MB/s

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Have you enabled "Turn off Windows write-cache buffer flushing" in the SSD policies?

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These are the results I got in mine with the write-cache off:

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That options is not checked for both device. I just enabled it and did benchmark, but same writing speed.

BTW, what's you device? surface book 2? Is your SSD 256G? (or 512G, 1T)

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I can't tell from the model number what drive it is.  If the letter F was actually a V it might be one of the PM 961 Samsung drives.

Have you seen any firmware upgrades for the drive.  Samsung Magician should be able to let you know, but do not try to install one until you check back.

The other thing is I had a drive which increased its speed if I disabled an anti-virus.  Make sure and do this while offline.

The Dell systems use a M.@ NVMe drive with a SATA controller.  The way to check is to look in Device Manager under Storage Controllers and see if it shows SATA or Microsoft NVMe or Samsung NVMe. 

_____________________________________
ASUS Z790 Intel i9 13900K
Fully Win 11 Qualified
Intel Wireless BE200 network adapter

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That options is not checked for both device. I just enabled it and did benchmark, but same writing speed.

BTW, what's you device? surface book 2? Is your SSD 256G? (or 512G, 1T)

It is a SB2 15" 1TB

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I am returning my 2nd SB2 again, as I don't think I can get any update or resolution on this issue from Microsoft.

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Any update on this issue? What are Microsoft doing about it?! 

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Last updated August 3, 2023 Views 5,114 Applies to: