2 GPUs no SLI

[HeroXLazer]

What performance decrease would I get without an SLI bridge?

I want to build something like this but instead of the radiators 2 GPUs.

http://www.damngeeky.com/2012/11/19/7184/ssr-x-pc-case-mod-inspired-by-elite-u-s-fighter-jet-planes.html#more-7184

[Electronics Wizardy]

You need the sli bridge. Go amd if you don't want a bridge.

[rn8686]

What GPU are you using? With Nivida, you need an SLI bridge (Technically there are other ways to make Nvidia cards work cooperatively, but most games dont support). If AMD, newer cards run though the motherboard so you will be fine. 

[NoRomanBatmansAllowed]

1 hour ago, HeroXLazer said:

What performance decrease would I get without an SLI bridge?

I want to build something like this but instead of the radiators 2 GPUs.

http://www.damngeeky.com/2012/11/19/7184/ssr-x-pc-case-mod-inspired-by-elite-u-s-fighter-jet-planes.html#more-7184

You're gonna need an SLI bridge unless you plan on exclusively playing DX12 games.

[HeroXLazer]

GTX 1080

What if 1 of the GTX 1080s is a PhysX card?

[Guest]

1 minute ago, HeroXLazer said:

GTX 1080

What if 1 of the GTX 1080s is a PhysX card?

still you need a bridge

[HeroXLazer]

Just now, dexxterlab97 said:

still you need a bridge

I mean what would the performance decrease be if I use a PhysX

[RadiatingLight]

7 minutes ago, HeroXLazer said:

I mean what would the performance decrease be if I use a PhysX

PhysX doesn't improve performance at all usually, and when it does, it's like a 6 FPS bonus.

 

 

[Kc7vwc]

PhysX is a waste, more the pity. You can use two cards in a system without SLI, but the only to power a sperate screen from each card. 

To combine them, you need SLI or a DX12 game specifically coded to use multiple adapters. 

Radeon cards can Xfire over the pcie bus on Dx11, but if you can afford dual 1080s, you're looking at a huge performance cut going the AMD route right now.