No you wouldnt get '1024ram, 256bit, and 1080 core clock ' im afraid, i dont know how it works, but you dont get much performance increase in many applications, and for the record, dont buy another 8600GT
Basically, you get 2 or 3 or 4 cards, slot them into your motherboard, connect the together using small connecting PCB's.
Then just plug your monitor into one of the cards.
Higher FSB will create more northbridge heat, and you need a good motherboard to have high FSB overclocks, multipliers make it a lot easier to overclock, and sometimes gets you a higher OC
my OCZ wont do much over 900 MHz, which is no good,
Id look into geil ram, a mate has some, it does 1GHz easy and is only around 35 - 40 on overclockers