Chipsets are the main chips that will soldered onto the board. Each chipset will offer different levels of features, benefits and support for processors. When the motherboard manufacturer builds the board they can add additional features that may not be supported on the native chipset. (i.e. SATA III support on the early “6” series boards could only be had with a Marvell SATA III controller).
So the Z77 chipset will offer support for these features over the P67 chipset.
-Support for the IGP (Integrated Graphics on Processor) including support for Lucid MVP software.
-PCI-E 3.0 support
-Intel® SATA 3.0 controller (later models of the P67 may also have the Intel controller over the earlier Marvell).
-Support for Intel SRT (Smart...