IvyBridge should also be backwards compatible with SandyBridge motherboards. B65, H61, H67, P67, Z68
"Ivy Bridge is the codename for the yet-to-be released 22 nm die shrink of Sandy Bridge. Ivy Bridge processors will be backwards-compatible with the Sandy Bridge platform. According to a leaked Intel roadmap, Ivy Bridge processors will be released in March-April 2012."