Intel's Core i7-4770R shows up in another multimedia-focused micro PC. Which is the best CPU in Intel's fourth-generation 'Haswell' Core i7 stable? There's no shortage of choice - the i5-4210Y offers excellent credentials in an ultra-low-power package while the the i5-4440 hits an agreeable balance between price and performance - but from a purely technological standpoint, we'd be leaning toward the i7-4770R.

Armed with almost all of the quad-core prowess of the enthusiast-orientated 4770K, and topped-up with Intel's best Iris Pro 5200 graphics, the 4770R has the best overall combination of current Intel processing technology, and it wraps it all nicely in a 65W power envelope.

The catch? Well, it's a pretty big one: you can't go out and buy a Core i7-4770R. For this generation, at least, Intel's best desktop CPU-and-IGP combination is a socketed part reserved solely for OEMs who can choose to integrate the chip into turnkey PCs. Trouble is, there aren't many desktops carrying the premium 65W chip, and those that have attempted to use this attractive processor haven't been without fault: Gigabyte's Brix Pro shoehorned the i7-4770R into a teeny-tiny enclosure and paid the price in terms of sky-high temperatures and unbearable noise.