Radeon R9 M270X 

The speed increase from your R9 270X CF setup will be noticed, greatly, where you should be doing 1080p at 60FPS without a problem, and even 1440p at 60FPS+ and some 4K gaming if you've got the display or TV that supports that resolution.

The 2 x SAPPHIRE R9 270X Vapor-X cards are a potent setup in Crossfire, so I would recommend upgrading to something of equivalent power - but a single-GPU solution.

Otherwise these drivers do contain a handful of other Crossfire fixes, including fixes for Total War: Rome 2, Alien: Isolation, and Shadow of Mordor.

When it comes to building and configuring Core M, Intel likes to refer to their efforts as the “Fanless Challenge,” reflecting the fact that their biggest goal with Core M is to comfortably get the processor in to 10” tablets under 10mm in thickness that are passively cooled.

The end result no doubt limited what performance optimizations Intel could integrate into Broadwell’s design, but it also functionally reduces power requirements for any given performance level, furthering Intel’s goals in getting Core performance in a mobile device.

Its desktop equivalent which is likely to use the Radeon R9 275X branding will feature the same GPU with better clock speeds.

Though the mainstream note-books featuring the GeForce GTX 860M and 850M Maxwell cores will still look like a better power efficient offering.