Best motherboard for dual gpu

MikeTimbers · 20 Jun 2020 at 15:11

Hi, all. I have an unusual need these days in that I run two gpus in one of my machines. The cards are a Titan X and a GTX1070. They fold and that's all they do but bus speed does make a smallish difference.

I can't find any chipsets that do dual 16X except X99, X299 and TRX40.

Can anyone recommend me a more budget board - Intel or AMD - that can do at least PCIE 3.0 x16 on two slots at the same time?

MikeTimbers · 20 Jun 2020 at 15:12

OH, the current board has just blown. A B150 which was adequate but I have to replace it, hence the question above.

Tetras · 23 Jun 2020 at 15:51

I was idly browsing specs and the Asus B550-E Strix says PCI-E 4.0 8X/8X. Cheap it is not, but perhaps there's a cheaper X570/B550 board.

Quartz · 23 Jun 2020 at 16:06

MikeTimbers said:
Can anyone recommend me a more budget board - Intel or AMD - that can do at least PCIE 3.0 x16 on two slots at the same time?

How about buying a second-hand server board?

MikeTimbers · 24 Jun 2020 at 09:35

It seems only X79, X99, X299 etc can do true x16 on multiple slots but also it's required to have chips with sufficient lanes anyways so this is not something that can be done simply.

Newer boards seem to have dropped true support for SLI/Crossfire because of demand I guess. So the market has split between "standard" boards that drop to an x4 for the second PCIE slot (assuming they even have a second slot!) and "workstation" class boards that require expensive chips and are more aimed at professional users who have big budgets to build expensive multi-gpu, high core count systems.

On the good side though I was able to fix the bent pins in my B150 so that's working again.

pandem0nium · 24 Jun 2020 at 11:12

MikeTimbers said:
It seems only X79, X99, X299 etc can do true x16 on multiple slots but also it's required to have chips with sufficient lanes anyways so this is not something that can be done simply.

Newer boards seem to have dropped true support for SLI/Crossfire because of demand I guess. So the market has split between "standard" boards that drop to an x4 for the second PCIE slot (assuming they even have a second slot!) and "workstation" class boards that require expensive chips and are more aimed at professional users who have big budgets to build expensive multi-gpu, high core count systems.

On the good side though I was able to fix the bent pins in my B150 so that's working again.

Threadripper TR4 and TRX4 as well for x16 x16.

Many mainstream boards can do X8 X8. AMD X_70 and some of the new B550. Intel Z boards and higher end H series.

With your B150, the second slot is probably a x4 from the chipset, which probably wiould be holding back performance.