No 8 is the fan connector, thats like you say I can connect to a molex one.
Case is not a problem, got a Antec pro case, the HD and optical drives are miles away.
What I am worried about is though that the end of the card is going to be stopped by the chipset heat sink.. and may be the last Sata socket (not connected, but might block, as the ATI card seems really long)