M.2 vs mSATA maximum speed.

[Alireza_]

Hi
What is Maximum Read/Write
and Max IOPS available on M.2 and mSATA ports?

 

[popatim]

Is google broke or don't you feel like reading something?

 

[Alireza_]

Is google broke or don't you feel like reading something?

It seems Google is broke because it does not have an answer for that!
http://lmgtfy.com/?q=what+is+the+max+speed+of+m.2

 

[popatim]

First link on the m.2 max bandwidth is the m.2 wiki
http://en.wikipedia.org/wiki/M.2

which states the max connection is 4 pcie lanes.

I think you can do the math from their.

 

[Alireza_]

First link on the m.2 max bandwidth is the m.2 wiki
http://en.wikipedia.org/wiki/M.2

which states the max connection is 4 pcie lanes.

I think you can do the math from their.

It means mSATA max speed is 6Gb/s and M.2 max speed is 24Gb/s ?
meaning 600MB/s vs 2400MB/s.
so why my mother fu...r laptop manufacturer which I bought 1 month ago are using mSATA instead of M.2?
(Asus s550 cb i7)

 

[Alteriego]

About transfer speeds:

M.2 max theoretical speed is around 10 Gb/s on 2 lanes = 1.164 GB/s.

This article here describes speeds of 1.4 GB/s on a special Asrock 4 lane mobo with an OEM only samsung M.2 ssd (and also gives a good explanation on this new generation of drives): http://www.tomshardware.com/reviews/samsung-xp941-z97-pci-express,3826-9.html
This is obviously not something you should expect if you buy an m.2 drive any time soon.

Reallistically, drives like the Plextor M6E (2 lanes, pcie) will give you up to almost 770 mb/s reads and 550 MB/s writes. http://www.guru3d.com/articles_pages/plextor_m6e_pci_express_ssd_review,17.html

Keep in mind this technology is pretty new and as such, prices will keep dropping and speeds will improve - up to that 1.164 theoretical limit on 2 lanes.

 

[popatim]

Most likely the manufacturer gave you mSata so you could actually buy something and stick it in their. M.2 drives currently can be had in either of the two 2-lane configurations but no one has a 4 lane available on the market and the 2-lane ones are hard enough to find to begin with. I'm not even sure all 4 lanes can be used at the same time but I also dont see why it couldnt. I'm sure in 10 years we will have some other new bus that replaces this anyways.

 

[Alteriego]

Most likely the manufacturer gave you mSata so you could actually buy something and stick it in their. M.2 drives currently can be had in either of the two 2-lane configurations but no one has a 4 lane available on the market and the 2-lane ones are hard enough to find to begin with. I'm not even sure all 4 lanes can be used at the same time but I also dont see why it couldnt. I'm sure in 10 years we will have some other new bus that replaces this anyways.

Quoting from the first article I posted, there's only one mobo like that for now:
"On Z97, the PCH-provided M.2 and SATA Express ports are mutually exclusive. You cannot use both simultaneously. Asus is adding third-party SATA Express controllers to some boards, so obviously those are able to operate independently. And then there's ASRock's solution: borrowing four lanes from the CPU's PCI Express controller to create the Ultra M.2 slot."

As for what manufacturers are making, there's a lot of M.2 sticks with SATA 3 interfaces. Only few real PCIE M.2 SSDs like Samsung's elusive XP941 (used in the article above for some interesting reasons) and Plextor's M6E.

But yeah, all things considered, this SSD technology is still in diapers.