I put a new machine together over the weekend and got most things installed when I decided to stop and run the benchmark.  The new machine is running Windows7, 64 bit addition and it has an AMD Athelon X6 1090T CPU running at 3.2 GHz (no overclocking).  I am currently running C7P.  I ran the benchmark first with 8G of DDR3 PC1600 memory and then ran it again after adding another 8G (tha additional memory just showed up tonight).  The render times are 5:01 with 8G, and 4:38 with 16G.  I was quite surprised that the additional memory helped as much as it did.