There is a latest 2.22mb bios released. Flash with that bios to run 3rd gen IB cpu. For Ivy Bridge, you need a bios flash to latest one.http://www.ecs.com.tw/ECSWebSite/Product/Product_Detail.aspx?CategoryID=1&DetailID=1205&DetailName=Feature&MenuID=1&LanID=0
For flashing, install 2600k and flash the bios to latest one. Make sure the PCB version is same.
But why do you replace 2600k with i5-3570k? 2600k is better than i5.