Quote Originally Posted by Carfax View Post
I've noticed that most vanilla GTX 285 cards maxes out at 1620 on the shaders, when using stock cooling..

Even though mine runs very cool (doesn't exceed 65c) at 756/1656, it has a tendency to lock up... At 756/1620, it's rock solid stable though..

But when you look at the GTX SSC, it is seemingly capable of running at up to 1700+ shader speed..

It's probably a voltage issue, wherein the SSC is using a a higher Vcore giving it the ability to hit higher clocks.
It's a slight voltage boost on the SSC which can be duplicated very easily if you check out this thread.

http://www.xtremesystems.org/forums/...d.php?t=215224