Hi Tech Legion posted a review on the Asus M3A78-T Motherboard AM3 Reverse Compatibility

The Asus M3A78-T motherboard packs into its board many useful features for just about any mainstream user. The Asus M3A78-T accommodates AMD AM2/AM2+ socket CPUs with reverse compatibility. The Asus M3A78-T features the AMD 790GX chipset with integrated graphics, support for CrossFireX technology, and DDR2 memory support. The Asus M3A78-T has a very user friendly layout with all the features expected of modern motherboards, with upgradability on a budget in mind.

Asus M3A78-T Motherboard AM3 Reverse Compatibility Review