The A890GXM-A2 takes the strengths of the A890GXM-A previously reviewed, and adds what is missing: USB 3.0. Sounds well enough, but as you'll see in our latest Socket AM3 motherboard review, we were taken for quite a ride with this offering!
Any major computer upgrade generally requires a full software reinstall too. No so if you heed the advice in the guide to Upgrading a Motherboard without Reinstalling. PCSTATS Tips