The Tech Report published a review on the AMD's Radeon RX 470 graphics carded
A quote from the article:
AMD's Radeon RX 470 graphics card uses a slightly cut-down Polaris GPU to deliver a big jump in performance at the $180-and-up price point. We extensively tested the card to find out just how much those cuts hurt.AMD's Radeon RX 470 graphics card reviewed @ The Tech Report