Click Image to see full-size graph of results
Looking at the ddr800 results for the X38 setup, you can see that the XLR8 ram did well, but not quite as well as the Corsair C6400 kit that it is matched up against. One obvious reason would be the inability to run the XLR8 at a 1T command rate. The scores are close though with that thought in mind. The biggest difference we can see between the kits is in the results that we have for FEAR, with the Corsair kit scoring better than the PNY kit.
Of course, as you speed up the PNY kit and run it at its default speeds (remember that the CPU is actually running 60Mhz slower) you see it start to spread its wings and take off. This kit was designed for high ddr speeds, and it does not disappoint in its scores.
Since we also had tested the ram on the AMD board, we decided to through in the results for it as well. We were able to get a 1T command rate on the AMD 790 board, so as you look at the scores we see that the PNY actually does very well against the Corsair kit. It actually ties or beats out the Corsair in seven of the tests. That 1T command rate is a huge performance booster.