The new AMD Radeon R9 380X is the very latest midrange graphics card from the big Texan GPU maker, and should be filtering into shops and onto the e-shelves as you read this.Asus' STRIX brand is its gaming-centric option and, as such, this owl-eyed version of the R9 380X comes with a little factory overclocking and a very tasty cooling array.But to really call the R9 380X itself a new card is something of a misnomer. That's not to say the R9 380X's Tonga XT chip isn't an advanced graphics core. In fact, after the Fiji GPUs that have gone into AMD's R9 Fury, Fury X and Nano cards, it's the most advanced chip AMD has got in its armoury.