ITOCP got their hands on two engineering samples of the upcoming 45nm AMD Deneb processors with 6MB L3 cache, one was clocked at 2.2GHz and the other one at 2.3GHz. That's nothing to write home about but the interesting thing is that they managed to clock this chip a lot higher than Phenoms that are currently available on the market. The site overclocked the chip to 3.44GHz but unfortunately that required a voltage boost from 1.224V to an unhealthy 1.568V.
Intel has always been better in SuperPI and early benchmark results indicate Nehalem easily beats Deneb in this synthetic benchmark. The overclocked 3.44GHz Deneb calculates 1M digits in 20.515s while a 2.4GHz Nehalem engineering sample does the job in 17.219s.