who cares about core i7 esp when this cost 8 times less than one of them.
are you sure about that? how do you calculate to come up with your figure. I have i7 setup at 3.8g. I know how fast it is and how much it is. Leave alone the stability issue he might have at that frequency. Think about the water cooling setup and power consumption. It is a great overclocking achievement, but it is just not practical.
I wouldn't doubt the overclock. That's a gigabyte x38 or x48 d6q. i had one and an e5200 and got similar (4.2ghz ish) overclocks. that's an fsb 1600 board, so the only thing you are stressing with that overclock is the processor.
and to the duche up there ^ bashing this build because he's sad it's got a faster clock rate than his i7, the point of an overcock like this with those sorts of voltages isn't practicality and stability. it's for shits and giggles. i think this guy's had his money's worth in fun.