I downloaded cpuid to check out a motherboard I've been using, and noticed that the SDRAM sticks had quite an array of speeds. Delving through my spares and testing them, I found the following - these are the pairs of speeds shown by cpuid, all are 64mb for what that's worth:

76, 100
100, 100
83, 100
100, 125
83, 125

As far as I recall, first number was CL2, the second was CL3.

Only mentioning it because I'd never come across speeds [RAM or system bus] of 76 or 125 before. And the combination of 83 and 125 seems pretty strange too.