AMD today launched the AMD Radeon HD 7990, the world's fastest graphics card powered by two GPUs and designed for gamers who want to take their PC gaming experience to the highest level. Based on AMD Graphics Core Next (GCN) architecture with AMD Eyefinity technology, the AMD Radeon HD 7990 graphics card promises to deliver unrivaled performance for playing the latest DirectX 11 games in extreme resolutions and multi-monitor configurations.

By combining two of the world's most advanced GPUs with 6GB of GDDR5 memory, AMD Radeon HD 7990 is the world's fastest graphics card. It supports up to six simultaneous displays with AMD Eyefinity technology and is the ideal graphics card for gaming on Ultra HD displays (4K resolution). At 100% utilization, AMD Radeon HD 7990 GPU's quiet triple-fan cooler is more silent than a typical library.

The new card enables gaming enthusiasts to play the latest PC games at maximum settings: for instance "Tomb Raider" with TressFX Hair enabled, or the "Crysis 3" in 4K resolution.

AMD GPU comparison
	AMD Radeon HD 7990	AMD Radeon HD 7970 GHz Edition	AMD Radeon HD 7970	AMD Radeon HD 6990
Stream Processors	2 x 2048	2048	2048	2 x 1536
Texture Units	2 x 128	128	128	2 x 96
ROPs	2 x 32	32	32	2 x 32
Core Clock	950MHz	1000MHz	925MHz	830MHz
Boost Clock	1000MHz	1050MHz	N/A	N/A
Memory Clock	6GHz GDDR5	6GHz GDDR5	5.5GHz GDDR5	5GHz GDDR5
Memory Bus Width	2 x 384-bit	384-bit	384-bit	2 x 256-bit
VRAM	2 x 3GB	3GB	3GB	2 x 2GB
FP64	1/4	1/4	1/4	1/4
Transistor Count	2 x 4.31B	4.31B	4.31B	2 x 2.64B
PowerTune Limit/TDP	375W	250W+	250W	375W
Manufacturing Process	TSMC 28nm	TSMC 28nm	TSMC 28nm	TSMC 40nm
Architecture	GCN	GCN	GCN	VLIW4
Price	$999	$499	$549	$699

AMD's 7990 is a dual-Tahiti part, placing two of flagship GPUs on a single PCB to make a single card. Each GPU has all 2048 stream processors, 32 ROPs, and full 384-bit memory buses. Joining these GPUs is 6GB of GDDR5 RAM, split up between the two GPUs for the 7900-series standard of 3GB of VRAM per GPU.

The 7990 supports AMD's PowerTune Boost technology, which is giving the card a base clockspeed of 950MHz, and a boost clock of 1000MHz. The memory is clocked at 6GHz, the same as the 7970GE. This makes the 7990 very close to being a 7970GE Crossfire setup on a single card, clocked just 50MHz below AMD's single-GPU flagship card.

AMD's 7990 has an official TDP of just 375W.

The card also includes AMD?s ZeroCore power technology, which was introduced with the GCN family. ZeroCore allows AMD to almost completely shut off slave GPUs when they're not in use, which in turn allows AMD to further reduce their idle power consumption. The biggest benefits are found in multi-card setups since this allows the fans on those slave cards to be shut down. Consequently this pushes the idle TDP of the 7990 down to around 20W.



The 7990?s cooling system is composed of 3 85mm fans positioned over a pair of heatsinks that run the length of the card. Around those heatsinks is another grooved heatplate that serves to channel airflow while drawing heat off of the RAM, VRMs, and PLX bridge. The overall length of the card ends up being 12".

The two Tahiti GPUs are joined by 3GB of Hynix 6GHz GDDR5 RAM and a PLX PCIe 3.0 bridge that provides connectivity between the GPUs and the PCIe connector.

Coming around to the I/O bracket, the 7990 uses the same output configuration as the 6990: 4 mini-DPs, and 1 DL-DVI port.

AMD is offering the AMD Radeon HD 7990 graphics card with a refreshed "Never Settle: Reloaded" AAA game bundle. In addition to "Crysis 3," "Bioshock Infinite," "Tomb Raider" and four other titles, AMD is including the "Far Cry 3: Blood Dragon" by Ubisoft. This new title will also be offered as a thank-you gift to all previous "Never Settle: Reloaded" customers and will be loaded automatically onto existing redemption codes.

AMD is placing the 7990 against NVIDIA?s flagships - the Nvidia GTX Titan and the GTX 690. The company is setting the MSRP for the 7990 at $999.

The AMD Radeon HD 7990 graphics card will be available worldwide in two weeks.