change your ram to crucial ballistix, xms2c4, or maybe even gskill HZ.
i dont know how good those patriot overclock, but i know the xms2c4 and HZ do. i've heard good things about the crucial. i'd get whichever one was cheaper.
as stated before, i am a big fan of sli, but i get good prices. if you are going to sli 8800gtx you better plan on watercooling them or having a REALLY good case flow. they get hot, which in return will heat up your entire system.