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Written by Olin Coles   
Monday, 07 March 2011
Table of Contents: Page Index
AMD Radeon HD 6990 Antilles Video Card
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
Radeon HD 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 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 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 

 
# Power requirementsBanzai 2011-03-08 05:45
Power seems to be respectable compared to other cards, it really manages itsel properly while giving good perfomance. Although it lost at Metro against ali'd rigs, the 6990 seems to do well.
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# RE: AMD Radeon HD 6990 Antilles Video CardAdam 2011-03-08 08:54
AMD's got some nice ideas there, but it's not exactly the most impressive card ever due to the numerous drawbacks.

The dual-bios switch is a pretty awesome idea even if the actual overclocking potential of the 6990 was a huge 'meh'.

I suppose these cards are never intended to be particularly sensible though and are aimed are that certain type of gamer (more money then sense, possibly).
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# CrossFire in the modern worldBruceBruce 2011-03-08 09:12
There has been a dearth of mainstream motherboards with dual 16x PCI-Express connections lately. My 1156/i5 combo is a very cost-effective platform for gaming, but with high end cards, the 8X PCI-E connectivity starts to hit bandwidth limits. This card, as over-the-top as it may seem, is an excellent way to get the full performance of two 6970-class GPUs with one slot.

I know it seems ironic to talk about budget when we're discussing a $700 video card, but if I take the money I would have spent on an X58/LGA1366 motherboard and a top-of-the-heap CPU and put it towards the video card, I think it's a better bang for the $$$$.
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# RE: CrossFire in the modern worldAdam 2011-03-08 09:49
I can see where you're coming from, but I dont think 1366 is expensive enough to justify buying the 6990 over a cheaper crossfire/Sli setup which will have comparable performance.

Another problem is, whilst high end cards are great fun and all that, they're currently redundant. Current PC games are becoming so heavily gimped by the console market that we're not seeing anything worth buying these parts for.
Having said that I've not played Crysis 2 yet, but it's a console port. Bleh.
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# Not.Suhaib 2011-03-08 10:21
Crysis 2 isn't a console port, it was developed for PC from scratch, and it will support DX11 in the final release.
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# RE: Not.MikeFunktastic 2011-03-09 04:51
Suhaib is correct. I don't know where people are getting their news from. Just because it's going to consoles doesn't mean it was PORTED from consoles. Crytek has stated multiple times that CryEngine3 was developed for the PC first, ported to consoles second.
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# RE: Not.RagingShadow07 2011-03-09 08:05
Have you played the multiplayer demo? As soon as you start up the game, you're greeted by a "PRESS START TO CONTINUE" screen regardless of if you're on keyboard/mouse or controller (or were, I think they patched it). They pulled an Infinity Ward on Crysis 2. There's even an aim assistance option in the settings menu. If not for console, it was definitely designed for the controller, which, to me, is still showing how little most devs care about PC now.
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# RE: RE: Not.Suhaib 2011-03-10 00:52
Is that your logic? have you ever considered people who prefer controllers in the PC consumer base?
RagingShadow, I suggest you wait until the game is released.
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# RE: RE: RE: Not.Adam 2011-03-10 07:00
Do you honestly think that enough people use controllers for FPS's on the PC to justify them putting the default message as "press start to continue"? Really?
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# What did you expect?Olle P 2011-03-09 02:19
In terms of overclocking I don't expect a 450W card to reach very high until some more efficient form of cooling is applied.

In this case I don't count the "What the lawyers make us say" setting at 830MHz 1.12V as the reference setting, but just a safe adaptation to get the card within the PCIe standards.

880MHz and 1.175V is the reference speed, and from there the card can be overclocked a bit. How much past 900MHz is still anybody's guess though...
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# rip offtechman 2011-03-08 22:01
What a rip off.699.00 thats a hundred over the hd 5970 when it was released.The only reason it is this high, is the fact that there is no competitive card out there.An extra 2 gigs doesn't cost a hundred dollars.
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# The price is right.Olle P 2011-03-09 02:22
The $700 is the price of a pair of 6970, which is essentially the equivalent but require more space, two more power cables and an extra PCIe slot.
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# RE: The price is right.David Ramsey 2011-03-09 10:01
...and is faster, quieter, and gives you the option of starting with one 6970 and upgrading later. Aside from "fastest single graphics card" bragging rights, I really don't see the point to a card like this.
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# Future proofMichael 2011-12-03 03:45
Its a card that will last a long time as a high end graphics card. Its a future proof card.
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# Right PriceComputer Support 2011-03-09 23:38
Yes it is very expensive product
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# RE: AMD Radeon HD 6990 Antilles Video CardSuhaib 2011-03-10 09:11
They fixed it with a patch, and they've also talked about crysis 2 shipping with DX9, and being patched later to DX11.

And almost all my friends and I use controllers when we feel like it.
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# DnaAngelDnaAngel 2011-03-19 20:34
Adam makes a very Valid point with the Push start to continue message. Cytek can say this and say that but the game is obviously geared towards the Console market. As far as the card goes, weve seen this power struggle between Nvidia and Ati for years now. It is funny that Nvidia top 2 cards ATM have to be in SLI'd just to keep up. but soon as Nvidias 6xx series comes out then yep you guessed it balls back in Nvidia court again until Ati releases their 7xxx series. the pattern continues on. But not one person here can disagree that the PC gaming world IS being hindered one way shape or form of the badly aged current gen Console market.And until Microsoft/Sony and yes Nintendo release their next gen consoles PC gaming will be at a Tech crunch. and really until then these type are cards ARE redundant, with only a FPS gain, but a decent CPU and Crossfire/SLI setup is more then enough for even the newest of games at eye candy Resolution/Settings.
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# BenchmarksMarko 2011-07-12 14:11
One thing that is good to know though, ONE 6990 os almost as good as TWO GTX580's. Wow, nVidia fanboys are gonna rage at this.
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