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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

VGA Power Consumption

For power consumption tests, Benchmark Reviews utilizes an 80-PLUS GOLD certified OCZ Z-Series Gold 850W PSU, model OCZZ850. This power supply unit has been tested to provide over 90% typical efficiency by Chroma System Solutions. To measure isolated video card power consumption, Benchmark Reviews uses the Kill-A-Watt EZ (model P4460) power meter made by P3 International.

A baseline measurement is taken without any video card installed on our test computer system, which is allowed to boot into Windows 7 and rest idle at the login screen before power consumption is recorded. Once the baseline reading has been taken, the graphics card is installed and the system is again booted into Windows and left idle at the login screen before taking the idle reading. Our final loaded power consumption reading is taken with the video card running a stress test using FurMark. Below is a chart with the isolated video card power consumption (system without video card minus measured total) displayed in Watts for each specified test product:

Video Card Power Consumption by Benchmark Reviews

VGA Product Description

(sorted by combined total power)

Idle Power

Loaded Power

NVIDIA GeForce GTX 480 SLI Set
82 W
655 W
NVIDIA GeForce GTX 590 Reference Design
53 W
396 W
ATI Radeon HD 4870 X2 Reference Design
100 W
320 W
AMD Radeon HD 6990 Reference Design
46 W
350 W
NVIDIA GeForce GTX 295 Reference Design
74 W
302 W
ASUS GeForce GTX 480 Reference Design
39 W
315 W
ATI Radeon HD 5970 Reference Design
48 W
299 W
NVIDIA GeForce GTX 690 Reference Design
25 W
321 W
ATI Radeon HD 4850 CrossFireX Set
123 W
210 W
ATI Radeon HD 4890 Reference Design
65 W
268 W
AMD Radeon HD 7970 Reference Design
21 W
311 W
NVIDIA GeForce GTX 470 Reference Design
42 W
278 W
NVIDIA GeForce GTX 580 Reference Design
31 W
246 W
NVIDIA GeForce GTX 570 Reference Design
31 W
241 W
ATI Radeon HD 5870 Reference Design
25 W
240 W
ATI Radeon HD 6970 Reference Design
24 W
233 W
NVIDIA GeForce GTX 465 Reference Design
36 W
219 W
NVIDIA GeForce GTX 680 Reference Design
14 W
243 W
Sapphire Radeon HD 4850 X2 11139-00-40R
73 W
180 W
NVIDIA GeForce 9800 GX2 Reference Design
85 W
186 W
NVIDIA GeForce GTX 780 Reference Design
10 W
275 W
NVIDIA GeForce GTX 770 Reference Design
9 W
256 W
NVIDIA GeForce GTX 280 Reference Design
35 W
225 W
NVIDIA GeForce GTX 260 (216) Reference Design
42 W
203 W
ATI Radeon HD 4870 Reference Design
58 W
166 W
NVIDIA GeForce GTX 560 Ti Reference Design
17 W
199 W
NVIDIA GeForce GTX 460 Reference Design
18 W
167 W
AMD Radeon HD 6870 Reference Design
20 W
162 W
NVIDIA GeForce GTX 670 Reference Design
14 W
167 W
ATI Radeon HD 5850 Reference Design
24 W
157 W
NVIDIA GeForce GTX 650 Ti BOOST Reference Design
8 W
164 W
AMD Radeon HD 6850 Reference Design
20 W
139 W
NVIDIA GeForce 8800 GT Reference Design
31 W
133 W
ATI Radeon HD 4770 RV740 GDDR5 Reference Design
37 W
120 W
ATI Radeon HD 5770 Reference Design
16 W
122 W
NVIDIA GeForce GTS 450 Reference Design
22 W
115 W
NVIDIA GeForce GTX 650 Ti Reference Design
12 W
112 W
ATI Radeon HD 4670 Reference Design
9 W
70 W
* Results are accurate to within +/- 5W.

In the previous section we discovered how well the new and improved AMD cooling solution managed temperatures for a pair of Cayman GPUs on the Radeon HD 6990 video card. In terms of power consumption, the results were generally similar. Keeping in mind that the Sapphire Radeon HD 6990 houses two independent high-performance graphics processors, it's expected that the graphics card will require significant power even despite the use of new Volterra regulators. The Radeon HD 6990 accepts two 8-pin PCI-E power connections for proper operation, and will not display a picture on the screen unless proper power has been supplied.

The power consumption statistics discussed below are absolute maximum values, and not representative of real-world temperatures while gaming:

Resting at idle with no GPU load, the Sapphire Radeon HD 6990 consumed a 46W - or roughly 23W per GPU by our measure. This level of power consumption was identical between standard and OC positions on the dual-BIOS. Compensating for a small margin of error, this also roughly matches idle power draw from the ATI Radeon HD 5970 video card. Once 3D-applications begin to demand power from the Cayman GPUs, electrical power consumption climbs. Measured at full throttle with FurMark's multi-GPU 3D torture load, the Radeon HD 6990 topped out at 350W maximum power draw and matches AMD's stated max TDP. Under full load using the OC setting on the dual-BIOS, measured maximum power draw climbed to 368W. Our measurements are absolute maximums, since Furmark is not representative of real-world gaming power draw.



 

Comments 

 
# 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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