Impressive, but I always wonder how much stability testing goes into these overclocks.

With just the stock tools, I can push my GeForce pretty far (relatively spoken, absolutely nowhere near what "professional" overclockers can achieve, of course), and it may appear stable for many hours, until suddenly it crashes anyway.

So what's the qualification of a "successful" overclock? Is it just passing a benchmark, and after that for all we care it can go up in flames?