Question Regarding M.2 And Motherboard

[Tsukashi]

This is my 2nd build, so I'm not super knowledgeable about specific things like this. I'm going to be using a Gigabyte x570 Aorus Master board and two M.2 drives, one smaller one for the OS, and one larger one for my important games. I have a few higher capacity 2.5" drives for all of my other storage needs already. My issue is when plotting everything into PC Part Picker. I'm left with the warning on the bottom that says this:

Note: The motherboard M.2 slot #3 shares bandwidth with SATA 6.0 Gb/s ports. When the M.2 slot is populated with a PCIe-based M.2 drive, two SATA 6.0 Gb/s ports are disabled.

 

Am I correct in assuming the bottom slot is slot #3? (The Manual has it listed as M2C_Socket) If so, can I disregard this message and assume I'll have full functionality of those SATA ports until I populate that last M.2 slot?

 

Secondly, when I finally decide to put down the money for another larger sized M.2, which SATA ports lose functionality? The manual doesn't seem to state which ones, although I could have missed this.

[Gamer4714]

3 minutes ago, Tsukashi said:

This is my 2nd build, so I'm not super knowledgeable about specific things like this. I'm going to be using a Gigabyte x570 Aorus Master board and two M.2 drives, one smaller one for the OS, and one larger one for my important games. I have a few higher capacity 2.5" drives for all of my other storage needs already. My issue is when plotting everything into PC Part Picker. I'm left with the warning on the bottom that says this:

Note: The motherboard M.2 slot #3 shares bandwidth with SATA 6.0 Gb/s ports. When the M.2 slot is populated with a PCIe-based M.2 drive, two SATA 6.0 Gb/s ports are disabled.

 

Am I correct in assuming the bottom slot is slot #3? (The Manual has it listed as M2C_Socket) If so, can I disregard this message and assume I'll have full functionality of those SATA ports until I populate that last M.2 slot?

 

Secondly, when I finally decide to put down the money for another larger sized M.2, which SATA ports lose functionality? The manual doesn't seem to state which ones, although I could have missed this.

It means that if you use the last m.2 slot which means the one on the bottom i think, 2 of the sata ports will be disabled as the cpus pcie lanes are shared withthe 2 sata ports and the last m.2.

[Tsukashi]

4 minutes ago, Gamer4714 said:

It means that if you use the last m.2 slot which means the one on the bottom i think, 2 of the sata ports will be disabled as the cpus pcie lanes are shared withthe 2 sata ports and the last m.2.

I'm aware of what the warning means, I'm looking for a confirmation on what I don't know already, such as which slot is slot #3, which I already assumed is the bottom slot, and then which SATA ports get disabled when I do populate the 3rd M.2 slot. 

[Gamer4714]

Something similar to this on reddit 

 

[Tsukashi]

3 minutes ago, Gamer4714 said:

Something similar to this on reddit 

 

That was more what I was looking for, thank you.

[Gamer4714]

1 minute ago, Tsukashi said:

That was more what I was looking for, thank you.

You're welcome