It's their in between mobo, MSI has long carried a G series of mobos, going way back to the 1366 there's been G45, and G65, and until the the Z77 chipset line of mobos all were the normal blue/black design....when they came out w/ the Z77 mobos they changed the design on the two to Black and Red and declared them as gaming mobos (many say in imitation of the long successful Asus ROG mobos)...they basically are the mid level priced mobos and some want the old familiar Blue Black design hence the G55 (haven't seen anything yet on sales, but appears they are low or MSI would be showing more press on them. Know I haven't had any calls on them, and I refuse to build on MSI due to their poor QC, so can't offer much on if they are any good...