Radeon R Memory Clock MHz Process Technology 28 nm Memory Size MB Memory Bus 256 bit Core Clock Base / Boost clock: MHz Card Bus PCI-E 3.0 Memory Type GDDR5 DirectX 12 OpenGL 4.3 PCB Form ATX Digital max resolution X (via a single HDMI connector or DisplayPort and not supported with two DVI connectors) Analog max resolution x I/O Dual-link DVI-I*1 / DVI-D*1 / DisplayPort*1 / HDMI*1 Card size H=43 L=253 W=142 mm