When Kinc and Elmor reclaimed the 3DMark 06 throne they used an Intel Core 2 Extreme QX9650 with the new C1 stepping. Unfortunately the new stepping didn't really help them to reach any higher than C0. It was still enough to break the world record though. Asian overclocker Pegazus has now shared a couple of results with a water-cooled Intel Core 2 Extreme QX9770, and they seem to point to that there are some golden C1 samples out there. The highest they reached was 5107MHz, and 3D stable at 5038MHz.
He used EK Supreme water cooling and Chiller for CPU cooling, and ASUS Maximus Extreme to push the processor to 425.6MHz FSB (x12). It's not unheard of processors reaching this speed with water cooling before, but they required more voltage and thus ran hotter than this one did.
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Intel Core 2 Extreme QX9770 C1 overclocked to 5107MHz on water
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