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Questions about GIGABYTE products => Motherboards with Intel processors => Topic started by: PANDER on April 17, 2020, 12:48:24 pm

Title: low speed nvme ssd
Post by: PANDER on April 17, 2020, 12:48:24 pm
Good morning guys, my z97mx gaming 5 rev 1.0 can support gen2 m.2 ssd up to 10gbps
My drive is samsung 970 evo plus but the actual speed is less than 800MB/s
My question is: should i enable something in bios to catch 10+gbps speed using m.2 onboard connector?
(no other drives installed)
Title: Re: low speed nvme ssd
Post by: shadowsports on April 18, 2020, 08:04:50 pm
Hi,
This is a bunch a tricky marketing mumbo jumbo.

If you are seeing 800 MBps, you are getting 6.4Gbps...  not bad.  Keep in mind 10Gbps is maximum theoretical, not actual throughput you might achieve.   

Your m.2 drive is PCIe 3.0 spec capable of x4 but the number of PCIe lanes available on the Z97 platform might be affected by CPU and the number of devices connected to your board which could, in theory limit the number of lanes available to storage.  Further, the way a manufacturer implements support can affect the actual speeds you achieve. 

Choosing Samsung is the best you can hope for as far as storage goes. 

Now see the boards chipset implementation.  There's a "switch" between the Z97 and m.2 interface.  What is it?  Maybe an enhancement that allows PCIe (2.0 spec) to operate at x4..  I don't know.  But you can see how things get implemented differently between manufacturers.

Maybe someone else who has more expertise here will jump in.

(https://i.imgur.com/IjeN2Js.png)   
Title: Re: low speed nvme ssd
Post by: dmdilks on May 28, 2020, 04:30:56 pm
Most of the Z97 boards don't support the NMVe drives. If you got it to work feel lucky it is working at all. The board was made in 2014 and there is no update bios for support for NMVe drives. Sorry