Can you change the Memory Divisor? It's clear that it's half the clock multiplier, leading to your 1:2 ratio. Set the divisor to 14, so that you'll end up with memory frequency of 200.
Thought I solved the issue, I was troubleshooting without following the #1 Rule of RTFM (Read the Freaking Manual) .. I didn't know AM2+ CPUs varied so much from their AM2 counterparts. Wrong Solution in Original Post.