Because you don't post what budget and where you will shop, so you buy the Z77 ( also you don't post you had the K-version or non-K cpu ) from http://pcpartpicker.com or the local PC store.
Because you don't post what budget and where you will shop, so you buy the Z77 ( also you don't post you had the K-version or non-K cpu ) from http://pcpartpicker.com or the local PC store.