Crossfire space

[Tech456]

http://pcpartpicker.com/p/XJknBm I'm worried that the cards will not fit,  I know pcpartpicker said it's good, but I just want to make 100% sure and also will they have a problem cooling since they are so close and how much room do i have for overclocking i know doing all three is pushing it put could I do 2 or only one or to overclock at all will I need a bigger power supply

[STRMfrmXMN]

http://pcpartpicker.com/p/XJknBm I'm worried that the cards will not fit,  I know pcpartpicker said it's good, but I just want to make 100% sure and also will they have a problem cooling since they are so close and how much room do i have for overclocking i know doing all three is pushing it put could I do 2 or only one or to overclock at all will I need a bigger power supply

I would go at 1000W for the PSU and honestly jump to ATX. mATX really isn't built for dual GPUs and that case is more partial to Mini ITX builds if you look at it's grommet layouts

[Glenwing]

It will work, but you will have to use the top-most and bottom-most PCIe slots.

The top card will be a fair bit higher temperature than the bottom but that's just how it goes with dual GPU. As long as your case has good airflow it shouldn't be a major issue. And 850W should be plenty.

[Wander Away]

I really don't know about putting two 390x crossfire in a mATX board. They will fit, but they generate a lot of heat, and even my 970 sli is already giving me over 78 degrees Celsius for the card in the back in essentially an open air scenario. It might be a better idea to go with a Fury X or 980ti. 

[Glenwing]

I really don't know about putting two 390x crossfire in a mATX board. They will fit, but they generate a lot of heat, and even my 970 sli is already giving me over 78 degrees Celsius for the card in the back in essentially an open air scenario. It might be a better idea to go with a Fury X or 980ti.

Fury X and 980 Ti both generate a similar amount of heat as a 390X too.

[Wander Away]

Fury X and 980 Ti both generate a similar amount of heat as a 390X too.

But he's running them in crossfire. 

[Glenwing]

But he's running them in crossfire.

Switching for a Fury X or 980 Ti wouldn't put out any less heat, so I don't see what the distinction is. The Fury X I see would be ok because it has the AIO cooler, but the 980 Ti will have similar cooler design options as the 390X, and with similar heat output there's no problem with the 390X that would be solved by getting a 980 Ti instead.

[hogfather]

850W will be enough, but you might find you self getting close to 100% if you over clock everything.   having a crossfire configuration myself i would STRONGLY recommend a case that has a fan or two on the side panel so that you can exhaust the heat from the card, which is life having a hair drier on.  I ended up cutting a hole in my side panel just to install a fan and it helped.  

 

you should really consider an ATX case.  Btw, if you use crossfire with that MB you'll block that third pci slot if you ever want to use it in the future.