At $218.99 US the ASRock X79 Extreme4-M is the cheapest X79 motherboard on the market and while we do lose a little bit of overclocking headroom like we normally do when we move to a smaller board, the X79 Extreme4-M proves itself as a really capable board.
On the bundle side of things the X79 Extreme4-M comes in at a fairly standard level with not too much being seen; the features side of things are pretty strong, though, with the new XFast RAM technology along with the other XFast technology we see with ones like the XFast USB one giving us a clear boost in performance when it comes to testing.
On the overclocking side of things the X79 Extreme4-M didn't come in as strong as our larger Extreme4-M, but that doesn't come as much of a surprise as we always see mATX boards take an overclocking hit when compared to their larger ATX counterparts.
The price is probably the one piece of information that continues to stand out the most; that combined with the amount of power this board helps you achieve in a mATX case is just amazing. With one or two high end cards and a i7 3930K, you'd be able to build yourself an absolute beast of a system inside a mATX case.
Outside of the size, if you can fit a ATX sized motherboard in your case we'd recommend that you go with the X79 Extreme4 over this one. Considering it's only slightly more expensive than the X79 Extreme4-M and offers us better overclocking potential, it's the clear choice.
On the other hand, if you're dreaming about a performance system that fits in a mATX sized case, then you can't look past the X79 Extreme4-M that we have on hand today from ASRock.
Cheap isn't a word I thought I'd be sharing when it comes to the new Sandy Bridge-E platform, but at $218.99 US the ASRock X79 Extreme4-M isn't just a cheap motherboard that can give you some serious power, it's the cheapest motherboard currently being sold on Newegg at the moment for the new SB-E platform.