Best setup for 290x crossfire.

[Aleppi]

I have just purchased a 290x lightning to crossfire with my stock 290x. I have a fractal design define r4 and was wondering which card would be best to put on top to avoid heat issues.

[JoshM]

I would put the reference card on the bottom so it gets the most air 

[snkmoorthy]

If you put the lightning on top of the reference card, it is blowing hot air on to the PCB of the reference card at the bottom.

[Aleppi]

I would put the reference card on the bottom so it gets the most air

If you put the lightning on top of the reference card, it is blowing hot air on to the PCB of the reference card at the bottom.

I knew it would get hot air from the lightning so should I put the lightning on the bottom since it can expel the heat from the reference card better

[GlassBomb]

I'd personally put the lightning on the top. My reasoning is that you will have a more quiet card for games that does not work with crossfire.

[Aleppi]

I'd personally put the lightning on the top. My reasoning is that you will have a more quiet card for games that does not work with crossfire.

Ok thank you I will do that

[snkmoorthy]

I had my PSU drawing in air from the bottom and a 290x lightning blowing hot air in to the case and eventually pushed out through other exhaust fans.

I noticed slight improvement in temps, when I turned the PSU around, drawing air from inside the case (ie.. suck in hot air from the 290x lightning).

 

So may be you can keep the reference card at the top, the lightning at the bottom and make the PSU suck in and push the hot air from Lightning as well, out.