290X's Stacked

[saedrin]

Anyone running 3 or 4 of these stacked on top of each other? (IE. 2 slot, 2 slot, 2 slot, 2 slot)

I'm considering changing my 290x/260x/290x/260x mining rig to 4x 290x's but I'm seriously concerned about airflow when these cards are touching each other..

Here's an exact picture of what I'm looking to do.

 

[The Mac]

put them under water, aairflow to the cards themselves wont be an issue then.

 

[FrgMstr]

I would be concerned about airflow to the GPUs in that situation. I assume the GPUs will be running at 100% utilization at most times?

You can see my setup for gaming on page 2 and how the cards throttled on page 4. Full specs on page 1.

http://hardocp.com/article/2013/12/13/4_weeks_radeon_r9_290x_crossfire

 

[saedrin]

Yeah they're downclocked a bit to 875 but still running at 100% util.

I've got them spaced out now and they can hit 75C at full load around 80% fan. I'm basically just curious if they'll stay under 90C at 100% when they're stacked. I have a bad feeling that they're just too close for this though.

 

[saedrin]

put them under water, aairflow to the cards themselves wont be an issue then.

I'd prefer not to drop an additional $600+ on cooling unless absolutely necessary.

 

[The Mac]

youll get no throttling, OC potential and extra hashes of it.

Depends on how serious you are about mining i guess.

 

[Rizen]

Don't do this. I have my cards spaced with a full slot between them, and only 2 290Xs, and the top card still has to run the fan at 4000RPM to stay under 95C. With all four cards sandwiched you won't have nearly enough airflow. Get PCI-E powered risers and spread them out in a mining setup, or watercool them. Those are your only real options.

 

[oMek]

get those ribbon extenders, would take up more room but for mining they work great.