Hi, so i've just ordered my new rig and im expecting it anytime in the next 2-3 days ( can barely sleep ) . And i was wondering since this is the first time I've put 2 GPUS in my build . I got 2 Asus GTX 670's DCU2top , and my question is can i overclock the cards and run them in SLI as overclocked or do they jump to default clocks when i enable SLI?