No. You don't need atx for gaming. There's even a couple of micro atx boards with sli capable slots. But I recommend a newer B75 chipset board as they all come with sata III and usb 3.0 built in. Newegg had a biostar b75 cheap but they increased the price by $31 this weekend by raising the price and charging shipping (it was free last week). Do a search on amazon and see if you can find one cheaper.