Server grade cards?
#1
Question 
Why do you guys not use server cards like the AMD S10000. And does any one know the hash rate of any?
#2
because you can get more performance for less by using desktop cards.
#3
says who
#4
http://www.newegg.com/Product/Product.as...d%20s10000
http://www.anandtech.com/show/6445/amd-a...pro-s10000

3k for a single card.
825MHz core clock
2x1792 (3584) stream processors
375W consumption at load

http://www.newegg.com/Product/Product.as...6814202058
http://www.tomshardware.com/reviews/rade...650-6.html

629 for a single card
1000 MHz core clock
2,816 stream processors
~300W at load
Copy of Battlederp 4

So for the price of 2 of those, you could buy 8 290x's and have a grand to spare.
#5
the S10000 is nothing more than two underclocked 7950s on one card with ECC memory.