Pulled the trigger on a GTX SOC Gigabyte 570

[bushwickbill]

So I took back my GTX560 Ti and bought a Gigabyte Super Overclock GTX570 for a whopping 466.99.
I know I got ripped off by going to a store instead of going online. But I am impulsive, What can I say.
But it is a Gigabyte SOC which are very hard to find.
So, How far should I try to push it past its 845Mhz default clock. I just found out that gigabyte has both Mem and Core voltage Overclock. I read a article that said that the mem on these card is guaranteed to run at 5Ghz or something like that?!
What are people getting with these cards anyways?