PC Express - Gigabyte Radeon™ RX 570 Gaming Videocard Features Powered by Radeon ™ RX 570 WINDFORCE 2X with 90mm Blade Fan Design RGB Fusion 2.0 – synchronize with other AORUS devices
AMD Radeon RX 570 Review - Ebuyer Gaming
GIGABYTE Radeon RX 570 DirectX 12 Video Card - Newegg.com