Welcome... probably best if you posted in AMD DDR2 for non-related question I'll move your post there after you have a chance to read this reply

I haven't used AM2 system so no idea, for Intel system you'd have a better chance with Crucial IF they're the new 80A revision 2x2GB Crucial Ballistix PC2-6400 new IC revisions are here and not the 804 revision. The Corsair Dominator would be better than old 804 revision crucials.

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