DIAMOND Radeon HD 7970 3GB Double Black Diamond Video Card

Taking a look at the bottom of the video card reveals a black PCB, which nicely matches the colour scheme of the black and red shroud.  The cooler is supported by a metal bracket on the bottom of the video card.

The output connectivity options on the back of Diamond's Radeon HD 7970 include two mini-DisplayPorts (1.2), an HDMI port (1.4a) and a dual-link DVI port.  Adapters are included to convert a mini-DisplayPort to DisplayPort, and a DVI to VGA adapter.

Removing the shroud reveals a blower and a pretty beefy heatsink.  The heatsink makes up most of the weight of the video card, and is comprised of a copper base and aluminum fins.  Cool air is sucked into the shroud by the blower and pushed through the heatsink, with hot air exhaust coming out of the back of the video card.  There is a black metal frame attached to the video card, which acts as a heatsink for the memory modules and a base to attach the blower and shroud.  It also helps by adding rigidity and prevents bending of the PCB.

Diamond chose to use AMD's reference design for the Double Black Diamond.  The heart of the video card is AMD's Radeon HD 7970 GPU, aka Tahiti XT.  It's manufactured using a 28nm process, and the GPU is equipped with 3GB of GDDR5 memory.

The twelve GDDR5 memory modules consist of Hynix's H5GQ2H24MFR-ROC chips.  Each of the modules are 2Gbit (256MB) and are rated to run at 1500MHz (6000MHz effective) with 1.6v.