managed to get their hand on an AMD Phenom X4 and an Intel Yorkfield based QX9650 and have run the two against eachother in Crysis to see which chip is the better one.
Also thrown in for comparison was an Intel Core 2 Duo E6850 and a Core 2 Extreme QX6850. As you might have already realized, the Intel chips are clocked a fair bit higher than the Phenom X4, so to make things a bit more even the Phenom X4 was overclocked to 3GHz.
This is still not quite a fair comparison, as the Phenom X4 had its memory running at 375MHz due to limitations of AMD's integrated memory controller, which prevented it from running at 400MHz as per the Intel based test systems. The Phenom X4 system also had a lower bus speed, due to Intel's move to the 1,333MHz bus.
The Phenom X4 was tested using an RD790 board, while the Intel CPUs were tested on a P35-based board. The graphics card used was an 8800 GTX and the test results look quite promising for AMD, at least if the Phenom X4s will retail below Intel's asking price. The only problem is that the Core 2 Duo E6850 seemed to outperform it.
The Crysis time demo was run five times and Expreview took the average of those runs, with the Phenom X4 scoring an average 46.48fps, while the QX9650 managed 49.95fps. The Core 2 Duo E6850 scored an average of 49.19fps, while the Core 2 Extreme QX6850 managed 49.92.
You can check out the full test results and some screen shots here
in IE only, as the site doesn't work in Firefox.