[SOLVED] Confused about PCIe SSD interface speeds, need help...

Mar 5, 2018
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I'm building a new system...

With an Intel Core i9-9900K, 32 GB (4 x 8GB) of G.Skill Trident Z RGB 3200 MHz DDR4, etc.
ZOTAC GAMING GeForce RTX 2080 AMP 8GB GDDR6 256-bit Gaming Graphics Card, Active Fan Control, Metal Backplate, Spectra Lighting GPU

And I got this new Gigabyte Z390 AORUS PRO motherboard, that has an M2M and M2A slot.

I want to put two Samsung 970 EVO NVMeM2 SSDs on my motherboard, as follows:

a 250 GB for my main Linux Mint 19 Tara MATE OS (soon to be Mint 19.1)
and a 500GB for Window$ - don't judge, some things still need that Redmond, WA disastrous so-called OS piece of crap...

Of course, I want the fastest M2 slot for my main Linux Distro, and the slower one for Window$

I did lots of Google searches, but was unable to find a straight forward answer...

WHAT IS THE DIFFERENCE BETWEEN THE M2M AND M2A INTERFACE ???

What I want to know the most, is this:

Is one faster than the other, and if so, how much faster ???

The only thing I found so far is very confusing to say the least...

Key..........Notched..........Provided interfaces
ID...............pins

M2A..........8–15..........PCIe ×2, USB 2.0, I2C and DP ×4
M2M..........59–66........PCIe ×4, SATA and SMBus

Any help is greatly appreciated, thanks.
 
Solution
Actually your M2A and M2M sockets have the same interface, it's just that the M2A can take the 22110 format.
They are both M Keyed PCIe or SATA.

So I don't think it will matter which one you use for Linux,

asoroka

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Apr 19, 2009
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Actually your M2A and M2M sockets have the same interface, it's just that the M2A can take the 22110 format.
They are both M Keyed PCIe or SATA.

So I don't think it will matter which one you use for Linux,
 
Solution