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GeForce 8200: Hybrid SLI Saves Power, Boosts Performance

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4:30 PM - 07/18/2008 by Patrick Schmid and Achim Roos

HybridPower and GeForce Boost

Let’s first talk about GeForce Boost. The GeForce 8200/8300 mGPU is capable of enabling Hybrid SLJ mode if you plug in a GeForce 8400GS or 8500GT graphics card. It will then render 3D graphics using both 3D units, which is very much what AMD’s 780G chipset does as well with Hybrid Crossfire X. Up to here, there is not much of a difference from a hybrid graphics standpoint.

However, the GeForce 8200/8300 comes with an additional feature, which we couldn’t find on the AMD 780G motherboard: Hybrid Power. Nvidia goes a step further and allows switching off an additional, discrete Nvidia GeForce 9800 or GeForce GTX 200 graphics card if 3D acceleration is not required. In addition, Hybrid SLI can be enabled with low-end cards.

Hybrid SLI with Power Savings

This sounds rather complex, but selecting your desired operating mode is very straightforward. Once an additional GeForce 8400GS or 8500GT card is installed, the system allows you to enable Hybrid SLI mode. Now it becomes important where you plug in your monitors: if hooked up to the integrated graphics, the GeForce 8200/8300 solution can not only activate GeForce Boost with the discrete graphics card, but it will also enable HybridPower, which will shut down the discrete graphics card when it isn’t needed. If you hook up your display(s) to the discrete graphics card, though, HybridPower cannot be enabled.

Should you connect displays to each of the graphics units (discrete and integrated), then neither GeForce Boost nor HybridPower can be enabled, as the system will be in multi-display mode.

By the way, two discrete graphics cards in SLI mode will also be treated like an individual one by the integrated graphics. This means that attaching the display only to the integrated graphics unit will disable both SLI graphics cards to save power when there is no 3D performance demand.

Connectivity

There are some limits to the single chip design, although these are not significant: Nvidia offers only one UltraATA channel instead of two, 12 USB 2.0 ports instead of a potential 14 (AMD has two USB 1.1 ports for industrial applications) and there are only three x1 PCI Express lanes.

However, Nvidia integrated its Gigabit Ethernet unit, which technically helps to save cost on the motherboard, and which follows the integral platform approach idea. As a consequence, Nvidia doesn’t have to use a PCIe lane for networking.

Like any other solution available today, the GeForce 8200 offers six Serial ATA/300 ports with command queuing support. Unlike AMD, Nvidia supports RAID 5, even though this feature remains interesting only on paper for low-cost platforms.

Talkback
hellwig 07/18/2008 11:45 PM
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Anonymous 07/19/2008 1:09 AM
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quote:
"The GeForce 8200 graphics unit provided much more performance in 3DMark06 .."
But your graph clearly shows AMD ahead in 3DMark06!

quote:
"Graphics: Nvidia Wins"
After losing all the 3D benchmarks and games, you still consider the Geforce the winner? If you consider Hybrid SLI that important, then at least put 'no winner' for 'Graphics' like you did for 'Efficiency'.

JPForums 07/19/2008 1:36 AM
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Quote :On average, AMD wins – but keep in mind that this is only the case because of the dominance in the productivity benchmark, which is based on office applications.


I think your priorities are backwards. Businesses buy a lot of systems like this. Productivity is usually their main concern with a system of this grade. Most people I know make heavy use of Outlook, Word, Excel, and other office products (or equivalents) on a daily basis. People I know that make heavy use of products like after effects, and 3DSMax usually do so on more capable systems. I can photoshop being used on systems like this, but I suspect Office type product usage would be much higher even on those systems. In conclusion, winning the overall score due to dominance in applications that will be used most heavily on systems like these makes sense. I'd be more apt to complain if the system won due to a few relatively small advantages in products that are less likely to used on a system like this while losing badly in the ones that are.

The lower power usage of the nVidia system multiplied by the number of units a business needs might be a good selling point. Though, I'd want to see the average power usage over a benchmark that runs a simple mix of Office and internet tasks before I'd be sure the nVidia system was the best choice (for standard office computers).

I do think that nVidia's hybrid solution offers a lot of value for people that use adobe products with support for GPU acceleration as they work better with nVidia cards than ATI cards. The hybrid solution would allow the user to run with relatively low power consumption and draw more power when running the adobe product in question. Of course, this still requires you to buy a separate discreet card, but then you can also use the system to game.

Anonymous 07/19/2008 4:04 AM
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Thanks for the article. I've been hoping that HybridPower and/or PowerXpress (AMD's implementation, though only in mobile parts) would get some limelight. One question about Hybrid Power: would it let you run dual display (analog+digital) like the regular IGP would, or does it disable dual-display as it does (did?) in regular SLI?
At any rate, it seems like an amazing feature that may just sway me towards nV in my upcoming build despite all the things I don't like about the company...

Shuriken 07/19/2008 10:52 AM
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The HDMI specs of the ATI 780G chipset do not fully comply with 1.3. Only the video part does. For audio only 2 Channel LPCM, Dolby Digital 5.1, or DTS 5.1 is supported. This is mentioned on several manufacturers websites and it has been confirmed by several users.

The Nvidia 8200/8300 on the other hand supports 8 channel LPCM over HDMI.

Anonymous 07/19/2008 5:59 PM
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You said that GeForce 8200 provides much more performance in 3DMark06 in the conclusion, however in page 16 of the article you wrote 780G has better performance in 3DMark06... Some kind of mistake? In the charts 780G has the lead

chesterman 07/19/2008 7:35 PM
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synthetics r good tests, but r SYNTHETICS. 780g won in the real game tests, and thats whats matters. when i buy a gpu, i want real applications performance, not a high 3dmark score.
i don't wanna be a amd/ati fanboy, but is clear that 780g is a superior chipset, except on the power consumption, when it loses for a minimal diference.
sorry for my poor english, i'm not from us/uk.
in my opinion; GRAPHICS: AMD/ATI WINS!

ZootyGray 07/19/2008 7:58 PM
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(quote)
The 4-phase voltage regulator does not use solid capacitors, but that is usually not the case for low-budget motherboards. However, it is powerful enough to stay cool even running an overclocked Phenom X4 processor. (quote)

HOW DARE YOU SAY THAT???? WITHOUT QUALIFICATION.

LOOK HERE FOLKS - the mobo manufacturers are being really quiet about this - I THINK (?) a few MIGHT have dealt with it - but nowhere do I see that the manufacturers' use of cheap MOSFET parts (3 or 4 phase) has been improved to handle hipower hiwatts cpu's - READ IT BEFORE YOU WEEP!
NOWHERE do I see a comforting statement that this economical weakness has been resolved. Nowhere do I see specific (!) "CPU SUPPORT LISTS" that really spell out a safe solution or a specific warning or anything that makes me feel safe. This is an issue with mobo manufacturers. Buyers need to simply understand the limitations. Here's a link to some brutal testing for you - or you can buy into this little lord of duh rings fairy tale. After 4 pages of nothing, I need a break.
read this:

http://www.anandtech.com/mb/showdoc.aspx?i=3299&p=2

I love the 780G boards - just know the limits!! And adding a specific fan might be prudent - the only reason I am reading this is for some info on the resolution of tthis issue - I don't see it. Most of this is old news from last april.

I will read more later (yawn)

ZootyGray 07/19/2008 8:06 PM
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Biostar has an intresting board with a little heat pipe on it - but no comment about why?? I think it's called space pipe or like that. And they say they support Phenom 9859 cpu.

Gigobyt seems to be shuffling "versions" - really unclear.

Azoosss seems to offer a 3year warranty (nice!) but the 780G board seems to have disappeared from the site - at least, I could not find it.

Stay below 95watts cpu is supposed to be safe
- an article on this issue????

PRICELESS
!

ZootyGray 07/20/2008 3:59 AM
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(quote)
we did not even try more demanding games such as Crysis, for performance reasons
(quote)

Of course - no one in their right mind would read a review seeking performance information.
Back in April and May when various 780g mobos were being raved about, it was revealed that Crysis would run and the HybridXfire (w 3450card) actually improved it - the numbers weren't much tho. 3dguru recommended using a 3870 - last May. What about the 4850? It wasn't out last April.

I have now read 11 pages and I wonder why. Your nvidiot bias is gross. And I feel like I am reading a promo for assrox. how about a ppcchippps review? that would be stimulating.

ZootyGray 07/20/2008 4:26 AM
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Nice of you to use an ancient phenom 9600 - was that the B2 stepping errors. Find that under the bench?

What happens when you drop a 9850/9950 in it? Does it go boom??

Is this your first rev?

ZootyGray 07/20/2008 4:46 AM
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—all Socket AM2+ boards can run a quad core AMD Phenom X4 processor.

Does this mean only one? like the crippled 9600.

Or can they run any phenom? like the 125 watt models. Or the 6400 x2?

And your benchmarks clearly show in real game that nvidiot loses. again.

This is one sad review. I apologize for reading it. This is a new low.

dragonsprayer 07/20/2008 7:15 AM
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intel chipsets rule and the 4870x2 will bury nvidia for the next 6 months. nehalem make amd buy of ati really smart.

Anonymous 07/20/2008 8:25 AM
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ZootyGray - cribber

- MSI lets you buy a motherboard with Solid Capacitors - as an option you do get it if you want
- The TLB error has only been reproduced in AMD lab, nowhere else.
- Since you can't find motherboards, let me make it easy for you:
http://asus.com/products.aspx?l1=3&l2=149&l3=639
Those are the 780G Mobos from ASUS that support uption 140W CPU's; Any problem get back to ASUS.

You obviously read a lot that goes over your head. Slow download and read less that way you can actually understand the small things and will not need to crip so much.

Anonymous 07/20/2008 11:24 AM
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AMD 780 is much FASTER than nVidia in 3DMark06, correct your conclusion please.

PS 07/20/2008 5:25 PM
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I don't think they give a ****.

The sound properties and energy consumption is affected by the manufacture's choice of components and driver support, and are not entirely a chipset issue.

Some of the conclusions seem to be made by retards. They contradict the facts of their own testing. If you're not payed to lie, fix the text - Boneheads

Ryun 07/20/2008 5:27 PM
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—all Socket AM2+ boards can run a quad core AMD Phenom X4 processor.

Does this mean only one? like the crippled 9600.

Or can they run any phenom? like the 125 watt models. Or the 6400 x2?

=======================================================================

I helped a friend's friend build an AMD phenom machine with a Gigabyte 780G board with a 9750. It works fine, unlike some other 780G boards out there but Gigabyte, along with some others, have updated their CPU lists. The 9850 was not recommended though.

njalterio 07/20/2008 5:54 PM
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If you are going to make blatantly wrong statements in your conclusion regarding which is the better graphics solutions, at least fudge your benchmark results so it looks consistent! I don't know if I am missing something, but why is Nvidia the winner if AMD won all of the graphics benchmarks?

Whenever there is a really funky article written, I check up top to see who has written it and it is always Schmid and Roos.

Miribus 07/20/2008 5:57 PM
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-0+

The chipset has nothing to do with the processor support in terms of power consumption.
The power supplies on the motherboards does.
Either power supply on the board supports 125w, 140w (or higher if you're overclocking) or it doesn't.
One of the reasons that cheaper boards don't allow overclocking features is that they know they don't have a supply that can take it.
There's a reason that they have heatsinks on those fets.

njalterio 07/20/2008 6:07 PM
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@ Canute24, are you absolutely certain that the phenom TLB error has only been found in AMD test labs?

Maybe you should take a look at this:
http://forums.ageofconan.com/showthread.php?t=121752

*hands dunce cap to canute24*


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