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Written by Olin Coles   
Wednesday, 16 March 2011
Table of Contents: Page Index
Sapphire 100310SR Radeon HD 6990
Sapphire Radeon HD 6990 Appearance
Antilles Detailed Features
Antilles Features and Specifications
Video Card Testing Methodology
DX9 SSAO: Mafia II
DX10: 3DMark Vantage
DX10: Crysis Warhead
DX11: 3DMark11
DX11: Aliens vs Predator
DX11: Battlefield Bad Company 2
DX11: BattleForge
DX11: Lost Planet 2
DX11: Metro 2033
DX11: Unigine Heaven 2.1
Overclocking and Temperatures
VGA Power Consumption
Sapphire Radeon 6990 Conclusion

Sapphire 100310SR Radeon HD 6990

Manufacturer: Sapphire Technology
Product Name: Radeon HD 6990
Model Number: 100310SR
Suggested Tested: $709.99 at

Full Disclosure: The product sample used in this article has been provided by Sapphire.

Featuring dual 1536-Core Cayman GPUs, AMD's Radeon HD 6990 Antilles graphics card redefines the high-end.

When it comes to computer hardware there's something for everyone, and this rings especially true for graphics cards. If you're on a tight budget, but still like to point and shoot your way through levels, there are plenty of affordable entry-level products that can satisfy your needs. But if you're an enthusiast gamer who demands only the highest level of performance that far surpasses mainstream standards, then it's your lucky day, because manufacturers are making great leaps with every new generation of computer components. Since both ends of the user spectrum clearly exist, then so must there also be products to support them - regardless of how extreme they appear. Enter the Radeon HD 6990 graphics card, code-named Antilles.

Hardware enthusiasts may recall that AMD's Cayman GPU, introduced with the Radeon HD 6970 video card, that features two graphics engines with an asynchronous dispatch and off-chip geometry buffering to 96 tessellation units using a new VLIW4 shader core architecture. Now multiply all of that times two, and you've got the Radeon HD 6990. Equipped with a 4GB GDDR5 256-bit video frame buffer, each of the Cayman GPUs offers 24 SIMD engines and 96 Texture Units for 192 total units and a combined stream processor count of 3072. Additionally, the AMD Radeon HD 6990 utilizes several new MSAA modes including Enhanced Quality Anti-Aliasing (EQAA).

When only the very best will do, only the Sapphire 100310SR Radeon HD 6990 video card will do it for you. Engineered as a 450W-capable dual-GPU graphics card with Volterra regulators, Antilles delivers 169.0 Gtex/s and 5.40 TFLOPs by using two Cayman GPUs clocked at up to 880MHz. For those keeping score, that's exactly twice the performance of two Radeon HD 6970 video cards in a lossless CrossFire-X set, and all while maintaining a profile size identical to the Radeon HD 5970. Despite this level of output, AMD PowerTune technology manages consumption down to 350W on this flagship model.


The Sapphire Radeon HD 6990 takes advantage of improved anti-aliasing features to enhance DirectX 11 effects and deliver the most realistic gaming experience possible. When it comes down to producing top-end frame rates, the Radeon HD 6990 is unrivaled at helping gamers build a killstreak. AMD set out to design the fastest graphics card possible, and they accomplished this with the Radeon HD 6990, building a premium product only the most affluent enthusiast gamers will enjoy. While the Radeon HD 6990 accomplishes the extraordinary, AMD managed to also add accelerated multimedia playback and transcoding, AMD HD3D stereoscopic technology, and support for the 3D Blu-ray multi-view CODEC (MVC).

For those who have been patiently waiting for news on ATI Stream technology, it's been re-tasked as AMD Accelerated Parallel Processing, or APP technology. AMD Eye-Definition represents their commitment to PC gamers, PC game developers, and the PC gaming industry. Through Eye-Definition AMD delivers their "Gamers Manifesto", which they assert will enable the best experience possible regardless of hardware manufacturer. In this article Benchmark Reviews tests graphical frame rate performance with the AMD Radeon HD 6990 by using the most demanding PC video game titles and benchmark software available. Some favorites using older DirectX technology such as Crysis Warhead, PCMark Vantage, and Mafia II are included, in addition to DX11 titles such as 3dMark11, Aliens vs Predator, Battlefield: Bad Company 2, BattleForge, Lost Planet 2, Metro 2033, and the Unigine Heaven 2.1 benchmark.



# RE: Sapphire 100310SR Radeon HD 6990Robert17 2011-03-16 19:30
Long ago I came to the realization that as I continued to build, re-build, and enjoy computers as a hobby, as well as for work, that one constant would be in play: continuous performance improvements. This is just another of those "wow" products. There've been many, but this kinda stands out in it's own way. 6990. Can't wait for the 18125's. Hope I'm around that long.
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# RE: RE: Sapphire 100310SR Radeon HD 6990Olin Coles 2011-03-16 20:28
At the rate we're seeing overlapping improvements we'll see something twice as fast in less than two years.
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# Here we go againCom-Tek Chris 2011-03-17 07:51
I just ordered mine on the Egg about 3 minutes ago. I'll make my own personal comments after giving it a whirl in my personal world. I might be eating my words from previous posted comments, lol, oh well, as life goes.

to be continued..............
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# 256bit?zac 2011-03-17 21:25
Is this 256bit? Or 256x2bit?
And if it is only 256-bit video frame buffer, why? Or how? previously all dual gpu setups had 2x the memory controller.
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# RE: 256bit?Olin Coles 2011-03-18 08:14
Like the I explain in the article, this product has two GPUs on one PCB. Each GPU offers a 256-bit memory bus to the video frame buffer. Having two GPUs won't make single 512-bit lane, but will double bandwidth to 2x 256-bit.
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# AMD 6990 reviewsJ.King 2011-06-27 22:03
Correct me if I'm wrong but as far as I can tell ALL the 6990's are made in exactly the same place. IE the card's are all identical except for the stickers on the front. So why the price difference? This was true for the 6950's and 6970's until recently when a bait and switch was pulled by various manufacturers XFX comes to mind. The card's were changed (BIOS switch was removed and other less obvious changes) but the model number's remained the same and they were still being sold as reference.
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# RE: AMD 6990 reviewsOlin Coles 2011-06-27 22:09
You are mostly correct. There are some differences depending on what the partner pays for (cooling/BIOS/overclock), but the engineering is generally all done by the manufacturer. There are a few who receive the engineering and make their own PCB, but it's rare. As for pricing, you'll have to take that up with the brands and retailers.
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