In short, H67 Express gives you access to the HD Graphics 2000/3000 engine built into every second-gen Core CPU(no need for a graphics card), while motherboards centering on P67 Express require discrete graphics cards. H67 lets you overclock the HD Graphics component (golf clap), while P67 facilitates CPU-based overclocking. If the customer wants to overclock then they have to get a processor ending in ‘k’. So the i5 2500k would be the processor to go for as it is fully unlocked. The standard i5 2500 has very limited overclocking.

Z68 lets use the HD Graphics built into the chip and overclock. So if someone wants to overclock there processor but doesn’t want a graphics card this is the chipset to use. Z68 also allows for SSD caching. SSD caching is the ability to add a small solid-state drive to a system already running a larger mechanical disk with the purpose of speeding up read performance of data cached to the SSD. This will probably be more useful for servers to help increase performance. If you already have a PC with a large drive, ie 1Tb and don’t have the money to buy a SSD to use as a boot drive, but you can afford a 40Gb SSD, it’s very easy to add this in.