Worked perfectly out of the box once I had a battrry installed, only difficulty I had was finding the sound card driver which I did find which was a windows 7/vista driver from Lenovo for the Realtek ALC662. I hope this helps someone.
this is a dual channel motherboard so It doesn't matter if you use 2 or 4 ram sticks. despite what's is written in the motherboard itself "4 channel ddr3". plus almost 3 months to be shipped. I was offered the possibility of refund if I sent it back to the seller. but it would be another 90 days without being able to use the computer I built in may. now I'll have to buy another one 4 channel and when it arrives try to sell this thing in the local market. very happy experience haha. no buy a am4 in your local store and forget about this website.