Getting a new model number also helps recognise which one is Ivy and which one is Sandy bridge.
That said: when I read through the specs of the series 7 chipset on the Intel website and compare it to the series 6 (Sandy) there is really not much difference. The biggest difference would be the 3rd display pipe support on series 7 chips. It has to do with the HD4000 obviously. There are even some thoughts that Ivy Bridge CPUs should work on the SandyBridge systems. Obviously you MAY need a update of your BIOS. But the difference in chipsets is more on paper than anything else. Really.