Question Gigabyte X570 UD Motherboard block diagram

[pirs]

Hi,
I wonder if somebody has a block diagram of the Gigabyte X570 UD motherboard. I am looking for detailed information about PCIe slot arrangement.

I have a board with AMD Ryzen 5600G and it looks like there are some limitations in the case of PICe card support;

My working setup:

Slot 1 - 16x - LSI HBA card PCIe 2.0 8x
Slot 2 - 1x - Marvel SATA controller
Slot 3 - 4x - Intel X550 T2 NIC - PCIe 3.0 x4
Slot 4 - 1x - empty
Slot 5 - 4x - Intel P1000 Dual NIC - PCIe 2.0 4x

onboard SATA - 6x SSDs

I try to use different arrangements with Intel X550 and X350 NICs - both cards are PCIe 3.0 4x -

Slot 3 - 4x - Intel X550 T2 NIC - PCIe 3.0 x4
Slot 4 - 1x - empty
Slot 5 - 4x - Intel X350 T4 NIC - PCIe 3.0 4x

but in that case, SATA 5&6 is not available, but if I try X350 or X550 with P1000 it works, only difference is that P1000 is PCIe 2.0 not 3.0

If only x350 or x550 is connected - everything works.
Also, when I tried different configurations - Intel x350 T4 and Intel i226 (Pcie 3.0 1x card)- neither card was detected by OS.
Both cards are OK as they work separately, also my previous setup with 2x P1000 or with single x350 works.

I wonder if there are any limitations of this board related to PCIe cards like there cannot be two PCIe 3.0 cards in PCIe 4x slots or if SATA lines are shared with PCIE lines.
The manual describes both slots as PCIe 3.0 4x without any notes about the limitation.

Best regards.

 

[drea.drechsler]

The block diagram is going to be similar to any other X570 chipset motherboard: the first PCIe x 16 slot and M.2 socket are connected to the CPU and intended for the GPU and an NVME. Their supported PCIe generation depends on the specific CPU/APU being used.

All other PCIe slots are connected to the chipset and also depend on the CPU/APU being used for PCIe generation supported. The lanes available to each of the chipset sockets will vary depending on what is in any other PCIe socket and what SATA drive ports are being used. Careful review of the board's detailed specs will be needed to determine how it works.

https://www.gigabyte.com/Motherboard/X570-UD-rev-10/sp#sp

 

[pirs]

Hi, thanks for your response.
I checked the board manual again and there is no information about any resource sharing. In my z390 board for example there is information if an M2 slot is used SATA 5&6 is not available, but not in the case of Gigabyte X570 UD board.

As I understood both PCIe 4x slots are provided by X570 chipset ( one of them is instead of the second M2 slot, I selected this board because it has 1 x 16x + 2 x 4x PCIe slots).

Based on the x570 connectivity diagram, the chipset supports 2x2 SATA and 16 Flexible PCIe lines.
8 lines coulnd be used as PCIe 8x or 2x 4x slot, and second 8 as 8x, 2x2x or 2x2 SATA so there is plenty of PCIE lanes.
This board support 6x sata - 4x dedicated and 2x from Flexible PCIE - 14 PCIe lanes left
Also, 2x 1x PCIe slots are available - still 12 PCIe lanes,
Onboard Realtec NIC - one lane 2.0 - 11 left
2x 4x PCIe - 3 lines left

Still, the board designer can go differently and use some shortcuts to simplify the design or maybe to make the design more wise scholar with different models and I suspect that in that case SATA 5&6 shares resources with PCIe 4x slot. Or there is a power limit as both cards consume more than 10W each. Or maybe there is a performance limitation as PCIe 3.0 4x and PCIe 2.0 4x work but no PCIe 3.0 4x + PCIe 3.0 4x or PCIe 3.0 4x + PCIe 3.0 1x, Or another case: X550 and X350 don't like to work together.