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dell xps 13 9350 samsung pm981a ssd compatibility

Dell xps 13 has samsung pm951(256gb) ssd on my computer.

I made a change of ssd on my computer. (samsung pm981 (3500 /2900))

But as a result of the change, I could not reach the desired values (1700/1600)

what is the reason of this ?

 

fztazc
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Re: dell xps 13 9350 samsung pm981a ssd compatibility

@fztazc  The XPS 13 9350 and 9360 have PCIe x4 interfaces for NVMe, but they run them in GT2 low power mode rather than GT4 high performance mode.  This is not user-configurable.  A PCIe x4 interface running in GT2 mode delivers similar performance to a PCIe x2 link, which limits you to around 1.8 GB/s.

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