How will this motherboard handle a secondary GPU?

[Flux Azreal]

I'm looking for a budget motherboard that can support 2 GPUs (not crossfire, two different brands) but I know not all motherboards work the same, and I'm trying to find out how the B550 Phantom Gaming 4 motherboard handles a second one, like will it split the cpu's x16 lanes into x2 x8 lanes or will it make it pass through the chipset? From the manual I find this

 

But I'm not sure if this means if only one card is put into PCIE3, or if it's the same regardless. Would anyone know where to look? Or can I choose how the lane allocation works in the motherboard's bios?

This is the manual's link from the site: https://download.asrock.com/Manual/B550 Phantom Gaming 4.pdf

[freeagent]

It wont do sli if that's what you were after.

[toasty99]

First off, what could you possibly be using a budget motherboard like that for that requires two GPUs? 

 

Second, your top pci-e slot will be 16 lanes of PCI-e 3.0/4.0 (depends on whether your cpu supports 4.0). The second x16 slot will be 4 lanes of PCI-E 3.0. 

[Flux Azreal]

Just now, toasty99 said:

First off, what could you possibly be using a budget motherboard like that for that requires two GPUs? 

 

Second, your top pci-e slot will be 16 lanes of PCI-e 3.0/4.0 (depends on whether your cpu supports 4.0). The second x16 slot will be 4 lanes of PCI-E 3.0. 

Ah I wasn't sure if it would be pcie 3.0 4 lanes if only 1 gpu was plugged into the motherboard and happened to be in that slot, thank you!

[Flux Azreal]

2 minutes ago, freeagent said:

It wont do sli if that's what you were after.

No, I'm using 2 different gpu brands (Intel ARC for encoding, and Nvidia for gaming/productivity)

[freeagent]

7 minutes ago, Flux Azreal said:

No, I'm using 2 different gpu brands (Intel ARC for encoding, and Nvidia for gaming/productivity)

You should be ok then.  Both cards will run at x8 on pcie4 from the CPU. I almost bought that board, but I got this one instead.

[Blue4130]

4 hours ago, freeagent said:

You should be ok then.  Both cards will run at x8 on pcie4 from the CPU. I almost bought that board, but I got this one instead.

The second x16 slot is only wired x4, so x8 and x8 seems impossible. 

[--SID--]

4 minutes ago, Blue4130 said:

The second x16 slot is only wired x4

Yes, from the chipset so PCI-e3.0.

[freeagent]

Sorry guys I thought that was Assrocks nearly  sli board.