<A HREF="http://www.amdboard.com/amd64_opn.html" target="_new">This should help you</A>
Theorically, a 3400+ CG could be :
ADA3400AEP4AR
ADA3400AEP4AX
ADA3400AEP5AR
ADA3400AEP5AX
What is important is the last letter, CG on Socket754 will all be identified R or X (C0=P).
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It's tricky to use words like <b><font color=green>AMD</font color=green></b> or <b><font color=blue>Intel</font color=blue></b> in a signature some users could think your are biased.