The profile was developed to make life easy as most boards default to 1.9V and at that time the SPD would allow 1066 with that voltage quite easy.

We have a new AMD specific module (1066) coming soon as some have seen issues witht he new 1066 reapers...so i jumped in to come up with something more special.

The CPU's have changed...its not as easy now with the older IC's but that does not mean you can't wind up the NB clock and gain more speed with a lower ram clock.