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It'll run hot and use a lot of power...I can see the appeal (and can't answer your question :|), but before you spend money on 3x8800GTX and a mobo be sure to price up the newer kit. Got a decent PSU ready? Is your PC on often and do you pay the electricity bill?
Isnt tri sli a bit of a tight sqeeze on a 680i?
By the time you have bought 3x 8800gtx cards and watercooled them you might aswell go with newer cards
I habe two! so not really lol another would be cheap to get hold off
GTX's are £80 each maybe? So £240 before you've even bought the mobo and a new PSU.
I need a new mobo anyway so that cost isnt too significant. But £240 tri SL 8800GTX should spank a £240 GTX280.