Cutting down the ROG tax a little Just like the 'Apple tax' of a certain phone and laptop manufacturer, the 'ROG tax' is an increasingly well-established concept in PC hardware circles; Asus' components do often carry a bit of a premium to them, for various reasons. Nonetheless, Amazon UK currently have a decent deal on the 850W 80+ Platinum ROG Strix PSU, taking it down to £120 . That's the lowest price it's ever been, by the looks of price tracking graphs, and a tasty 33% saving on its £180 RRP. At this price, you'd usually be looking at Gold-rated PSUs, rather than the ROG Strix's Platinum - a badge of certification that it works more efficiently than 80+ Gold units. The degree of real-world benefit depends on your usage, but it's also good for peace of mind - as is the fact that it includes a generous ten-year warranty.…