Please remove images when using quotes.
Noise is insane, fans are at 75%. GPU cores hover at only 60C though, not bad! There are 3 3000rpm fans at the intake of the cards. They do run at full power +, the 5870's are clocked at 900/600 and output is power is ~ 1550W, 124V & 15A. Still tweaking a lot to get power consumption down on the board, cpu and ram but for now I'm pretty satisfied at 2.06 Hashes per watt
This is a really neat setup.
My 5870 2gb run cool at 40% fan speed,
To spread the card I suggest that you use a smaller heatsink and place a GPU over it, then add a 2nd extender to the card on the right, (use shielded extender and provide 12v to it)
Did you feed any riser with 12v ?
I don't feed any risers with 12v molex. I may use a lower profile heatsink later, that was one I had sitting around. I can lower the fan speeds 25% and get on 5-8 degrees higher, but it is in my utility room so I really don't notice it.
Why add a second powered riser? I've been curios as to what these are used for.