pcie bifurcation 8x4x4 for NAS

[tjrose91]

i have a gigabyte z390 ud that supports 8x4x4 does that mean the whole electrical 16x is split to 8x4x4 i want to plug in a Quad NVMe PCIe Adapter but will it show all four drives or just 3

 

OR

 

the MB has two extra 4x pcie slots i assume those go thru the PCH

[Blue4130]

23 minutes ago, tjrose91 said:

i have a gigabyte z390 ud that supports 8x4x4 does that mean the whole electrical 16x is split to 8x4x4 i want to plug in a Quad NVMe PCIe Adapter but will it show all four drives or just 3

 

OR

 

the MB has two extra 4x pcie slots i assume those go thru the PCH

You aren't using a gpu? If not, then you will show three SSD's on the card. You need 4x4x4x4 to get all slots working. (on a card with a plx chip on it)

[Electronics Wizardy]

With x8x4x4 you can use 3 m.2 drives max on those adapters. 

 

The extra x4 slots go through the chipset.

[tjrose91]

4 minutes ago, Blue4130 said:

You aren't using a gpu? If not, then you will show three SSD's on the card. You need 4x4x4x4 to get all slots working. (on a card with a plx chip on it)

thats what i hope at least right now im just playing around with NAS one day i will do things right

[tjrose91]

4 minutes ago, Electronics Wizardy said:

With x8x4x4 you can use 3 m.2 drives max on those adapters. 

 

The extra x4 slots go through the chipset.

i will see if that works plugging all four drives in 

[Blue4130]

Just now, tjrose91 said:

i will see if that works plugging all four drives in 

It won't. Only three will show up.