In any case I wouldn't worry about it too much. If you're anywhere near 1300mhz your performance is insanely good.you can probably get higher - but in SLI those super high overclocks usually require water cooling, since the bottom card (usually) causes the top card to get a bit warmer. Which lowers the overall OC potential.
Yeah you're right. 1.28 GHZ is definitely fast enough. I wanted 1.3 GHZ just to round it up to the nearest 100, but it won't matter at all.
At 1.28 GHZ, I can also run my memory with a slight overclock to 7.48 GHZ without worrying about my core clocks down clocking or anything.
I still think though that if I were to remove my soundcard and PhysX card, my temps would lower quite a bit on both cards. But I'm not ready to move to onboard sound just yet
