Saturday, March 7th 2009

Radeon HD 4890 X2 a Reality On The Basis of Performance Against Competitor

AMD is attempting to revive its competitiveness that took a beating with NVIDIA's introduction of 55 nm G200b-based graphics accelerators. The method AMD seems to be adopting is by giving its existing flagship GPU, the RV770, a series of design improvements that facilitate higher clock-speeds, in turn, better performance on offer.

A lot has been said about RV790 till date, with each commentator coming up with a new version of the story. It has been more or less established that the RV790 will be a improvement over the RV770, though not a revolutionary one. Fresh information gathered by PC Games Hardware places a realistic estimate on up to where RV790 is going to push the performance envelope for AMD.

It is suggested that RV790 will revive direct competition with NVIDIA's GeForce GTX 260, post the company's remodeling of the SKU by enabling 216 stream processors against 192 on its original specs. With the single-GPU flagship accelerator based on the RV790: Radeon HD 4890 competing with GeForce GTX 260 (216 SP), one would wonder if the company would work on a dual-GPU accelerator. NVIDIA's GeForce GTX 295 emerged as the fastest dual-GPU accelerator, outperforming ATI Radeon HD 4870 X2, although it achieved that by using two G200b cores with all their 240 stream processors enabled. This leaves a tough task for AMD to design a card that outperforms GTX 295, considering the higher clock-speeds the RV790 comes with, ideally, only pushes the performance of the single-GPU card by 8~20 per cent. While there are no technical challenges the company faces in designing a dual-RV790 accelerator, it will do so only if it is able to outperform the GeForce GTX 295. AMD's add-in board partners (AIBs), most probably will be left to design their own dual-RV790 cards, much in the same way AMD left it to them, to design the Radeon HD 4850 X2.

From AMD's end, it seems like the company is treating the "X2" moniker as an object of prestige, that it would not want to tarnish by releasing something that falls behind its competitor in terms of performance. The HD 3870 X2 outperformed its then competitor, the GeForce 8800 GTX, followed by HD 4870 X2 outperforming GeForce GTX 280.Source: PC Games Hardware
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33 Comments on Radeon HD 4890 X2 a Reality On The Basis of Performance Against Competitor

#1
ShadowFold
Ooh, I'll be watching this. I might get one!
Posted on Reply
#2
alwayssts
I imagine a 4970x2 would likely be able to be competative. The fact that the AMD is cranking up the core clock to help compensate vs less tmus/rops, and that the gtx295 has them set so low (576mhz vs 950), plus the point it'd probably be a 3TF card, it's almost like a PR war waiting to happen.

The question I suppose I would ask is if it's a part they want to have to supply and warranty. These chips run at a slightly higher voltage to obtain their clockspeed, and will likely have a TDP of 165W. (1.3v/1.26v)x160W = 165W.

We see with the former X2 cards there is a power savings of 10% over running 2 seperate cards. PCI-E spec is 300W max. This card would be rated at 300W...and that's if they can pull it off. It would be teatering on that edge of possible but questionabley feasible to make work on a large scale.

No doubt Sapphire will make it work, perhaps through chip binning, but I imagine AMD just doesn't want to fux with something so painstaking.
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#3
Marineborn
i shall purchase one upon release and scream profusly. i hope it can crossfire with the 4870x2 or someone will be buying a card on here. HAHAHAH
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#4
1Kurgan1
The Knife in your Back
It's nice to see they are at least looking to design improvements beyond a die shrink and OC.

by: Marineborn
i shall purchase one upon release and scream profusly. i hope it can crossfire with the 4870x2 or someone will be buying a card on here. HAHAHAH
You could CF a 4830 with your 4870, but it would effectively drop your 4870 GPU's down to 575mhz and drop the ram substantially. So yes you could use the newer card, but it would just time it back to 4870 specs.
Posted on Reply
#5
BigBruser13
The Fight Continues Go! Go!

How can I decide what card to buy if they keep getting better every 2 or 3 months? And I would like to see AMD improve there cards with some physics if that's possible.
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#6
alwayssts
by: 1Kurgan1
It's nice to see they are at least looking to design improvements beyond a die shrink and OC.



You could CF a 4830 with your 4870, but it would effectively drop your 4870 GPU's down to 575mhz and drop the ram substantially. So yes you could use the newer card, but it would just time it back to 4870 specs.
The differance being that a 4830 will never have it's disabled arrays.

With a 4870x2 he could likely break out the soldering iron, the vr, some glue and a screwdriver and make it work...Maybe...On some level. :roll:
Posted on Reply
#7
erocker
I want to see what this 4890 GPU really is! Apparently someone from ATi told someone at the "FUD" that this indeed isn't a remake of the RV770. Then again it's the "FUD. But, then again have we seen any real information on this chip yet?
Posted on Reply
#8
alwayssts
by: BigBruser13
How can I decide what card to buy if they keep getting better every 2 or 3 months? And I would like to see AMD improve there cards with some physics if that's possible.
It's a 6-month schedule they've been sticking to fairly faithfully...kinda like the old days before the dawn of 400+mm2 dies that were made on immature fab processes. Henceforth I expect the 5800 series by early October.

OpenCL/DX11 will be handling physihcs in the future (bye-bye physX), and the FPU floppage of AMD's design will help for such things, and all things GPGPU. I imagine everyone expects the future to be 2-3TF cards, so we'd be looking at 4-5-6TF X2's/nvidia sandwich cards (be it 1280 shaders@1000mhz or 384shaders @ 2000mhz, or something else). I seem to remember Havok showing a crap ton of boulders on a....was it x1300? When something like that gets transported over to the new API it won't really matter, any and all cards from then on it will handle it, be it a crappy slow add-in card to your main gpu, your main gpu, or your lovely larabee or APU, perhaps even built into your next CPU.

I wouldn't worry about physics. :rolleyes:
Posted on Reply
#9
IcrushitI
Bring it on, I can see an upgrade coming. Prices should be reasonable considering the state of the economy.
Posted on Reply
#10
1Kurgan1
The Knife in your Back
by: alwayssts
The differance being that a 4830 will never have it's disabled arrays.

With a 4870x2 he could likely break out the soldering iron, the vr, some glue and a screwdriver and make it work...Maybe...On some level. :roll:
I know Marine, only thing he's going to manage with a soldering iron is a missing eye :laugh:
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#11
Polarman
Will this help "Global Warming".
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#12
ShadowFold
by: Polarman
Will this help "Global Warming".
I hope your kidding lol
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#13
PCpraiser100
Better ROPs is what I'm looking for in the next new series. With this, they can finally ignore what Crysis says with their card lineup. Also, I want better OC this time with the X2, seriously.
Posted on Reply
#14
wolf
Performance Enthusiast
if they do simply pick better binned cores, and get speeds that can beat a stock GTX295, i'd have to say its going to use more power, as i believe it does now?

not to mention ppl with GTX295's have probably oc'ed them, and a mild oc goes a long way for performance on that card.
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#17
spearman914
Will this be a considerably upgrade from a 4870x2?
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#18
ShadowFold
by: spearman914
Will this be a considerably upgrade from a 4870x2?
No I wouldn't. Wait neverminds, knowing me I probably woukd lol
Posted on Reply
#19
shagg
by: ShadowFold
I hope your kidding lol
The Hell with Global warming and Al Gore. We want performance.
Posted on Reply
#21
h3llb3nd4
4890x2 VS GTX 295... mmmm...Interesting
Posted on Reply
#22
ShadowFold
I don't think ATi would release this if it wasn't better than a 295. The 4870X2 is SO close to topping it. The 295 is always a few fps ahaid. But then again the 295 is 100$ more on average so.
Posted on Reply
#23
1Kurgan1
The Knife in your Back
by: shagg
The Hell with Global warming and Al Gore. We want performance.
Have you seen....

Posted on Reply
#24
Tatty_One
If in the main, this will be an RV770 with higher clocks and it does not get any added TMU's etc then I dont think it will move forward by a great deal in competativness, I only say that because additional clocks with my 4870x2 dont really bring much imrovements, for example going from stock 750mhz to 840mhz gives me 150 points in 2006 and 2fps in COD5, additional TMU's for example dont necessarily mean great improvements in performance if the architecture cant make best use of them, however, I cant beleive ATi would do it if they cannot bring at least 10%+ performance benefits over exisitng architecture.
Posted on Reply
#25
Tatty_One
by: ShadowFold
They're using a revised core so yea
Revised in my vocabulary does not mean new, it means updated or "tweaked" but ATM there seems to be too much speculation and insufficient fact.
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