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Dual 5770... Why none?

F

flexcore

Gawd
Joined
Apr 12, 2006
Messages
683
I'm wondering why none of the AMD/ATI partners, or AMD/ATI themselves, never made a dual 5770 card like the 5970? I think that would of been a sweet card!!!
 
No point to manufacture. An HD5870 is around the same performance and is probably cheaper to manufacture than 2 5770s.
 
I think the 5850 would be around the same price and offer the same level of performance. It just doesn't make any sense from a cost/performance ratio.
 
Because the duals are usually very expensive (like the ares which is more than dual cards). Making it from lower grade parts would probably make it less powerful and more expensive than a 5970.
 
flexcore said:
I'm wondering why none of the AMD/ATI partners, or AMD/ATI themselves, never made a dual 5770 card like the 5970? I think that would of been a sweet card!!!
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CF 5770's are basically a 5870, why would they want to seperate cards that perform the same??
 
i guess I just thought they could of made for people with only one PCI-E slot or for dual PCI-E to go quad CFX.
 
flexcore said:
i guess I just thought they could of made for people with only one PCI-E slot or for dual PCI-E to go quad CFX.
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Whats the point of dual or quad cfx if one card or two cards can do the same or better? (ex: HD5870 or 2x HD5870.
 
Would have been pure genius. They probably didn't do it because it would have hurt sales of the HD5800 series.
 
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Would have been cool if they did it the same way the 4670x2 was made. 4 outputs from a single card is nice, and it sounds from the reviews that I've read that there could be potential for Eyefinity using only DVI/HDMI ports with a design such as that.
 
I would assume the reason is that it would harm 5870 sales.

Why does crossfire scale so well with the 57xx series?
 
master noran said:
Amd would never do that because it's a stupid idea.
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Yeah AMD isn't crazy enough to cannibalize its own sales like that. A 5770x2 card would be priced like a HD5870 to prevent that from happening, but then that would defeat the purpose of a 5770x2 in the first place.
 
Looks like the best deal is to get 2 HD5770s for much less than a HD5870 and run them in Xfire. :cool:
 
Because dual 5770 card would require 2GB of ram, 1GB for each CPU.

That messes up the pricing.
 
master noran said:
If your 5770's knew that you wanted to swap them out for gtx460's they'd be pissed.
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I'm not going to swap them out for GTX460s. The timing is off. If they GTX460s would have been out back in the day when the HD5770s came out then I think i might have went SLI GTX460s.

Performance wise the HD5770s in Xfire are fantastic performers when they are overclocked and running in an overclocked system.

I got a hot deal on my HD5770s. I bought both of them right when they came out for around $300 OTD. Too good of a deal to pass up.


SLI GTX460 would cost at least $400 on a hot deal for the 1GB version and they would require more PSU requirements than my current HD5770 Xfire RIG.

Alot to think about. I've been doing alot of research on these cards and overall I feel like I made a great choice with the HD5770s in Xfire.

I can see myself jumping ship soon though. All depends on how good the next batch of HD6000 series cards are and how NVIDIA responds.

I'm all about value and performance because my money don't come easy and this hobby is expensive.
 
master noran said:
They didin't do it because CF 5770's and a 5870 are neck and neck.
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Not always. Sometimes X-fire actually scales better than a single card. Case-in point Fallout 3.

SonDa5 said:
If the card was priced at $249.99 it would have killed the HD5870.
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Not exactly. Like others have said, it's always better to get a single card. Plus, AMD wouldn't try to out-do themselves.

In the end, I think a Xfire 5770 is something you should only do if you seek to expand your system later.
 
If there was a single GPU card that matched 5970 in performance, the 5970 wouldn't exist.

In this scenerio there is a card that matches 5770 x 2 performance, the 5870.
 
Michaelius said:
Only for boinc crowd. Any gamer with at least a bit of common sense would rather buy 5850.
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Dunno about that. 2x5770 usually performs as well or better than a single 5870 even though added all up they are the same spec. Likely do to the additional PCI-e bandwidth available by splitting them up? Regardless 2x5770 isn't a bad choice over a 5850 even if it microstutters.
 
noquarter said:
Dunno about that. 2x5770 usually performs as well or better than a single 5870 even though added all up they are the same spec. Likely do to the additional PCI-e bandwidth available by splitting them up? Regardless 2x5770 isn't a bad choice over a 5850 even if it microstutters.
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Why would you bother with microstuttering and not always perfect multi-gpu gaming for few frames more over always working single card?
 
blastingcap said:
Yeah AMD isn't crazy enough to cannibalize its own sales like that. A 5770x2 card would be priced like a HD5870 to prevent that from happening, but then that would defeat the purpose of a 5770x2 in the first place.
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it could also hurt the customer as well since ATI/AMD would only have 2 choices of doing prices.. either hurt themselves by dropping the prices on all lower end products to keep the price within line for the 5870 or increase the price of the 5870 to make up the loss in profit due to less 5870's being sold..

its a good concept/idea but fails horribly in the real world application.. like some one said further up about how you could run single crossfire or quad crossfires with 5770x2's, why? ya might as well buy a 5870 get better performance and use less power on top of that.. and why would you run quad 5770's just run 2 5870's same performance since the 4th gpu wouldnt even get utilized to begin with due to the way crossfire works and the fact that games dont really take advantage of it..

its basically nit picking a company for your own benefit.. you have to look at it from both sides.. if you were ATI/AMD would you release this card? because i sure as heck wouldnt. and as a consumer i still wouldnt buy it even for the e-penis factor of owning a dual gpu card that didnt break the bank..

(not trying to be an ass but just stating my 2 cents)
 
Michaelius said:
Why would you bother with microstuttering and not always perfect multi-gpu gaming for few frames more over always working single card?
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I dunno, personally I'd go 5850 but that's because Eyefinity and Crossfire seem to have issues and I like the triple monitors.. I don't think the always working single card issue is quite as big a deal these days as it was even a year or two ago though (when not using Eyefinity). Also I'm not saying a 5770x2 card should exist, that's not wise - just saying 2x 5770 isn't a bad solution if you're willing to risk low single GPU performance for superior dual GPU performance over a 5850 (gambling on Crossfire optimizations). And a *lot* of games run really well on 2x 5770 so it's not a huge risk.


As for 2x 5770 outperforming a single 5870, what else could it be but the additional PCI-e bandwidth? They have the same amount of shaders, clock speed, aggregate memory bandwidth.. the only difference is 2 16x PCI-e lanes feeding the 2x 5770 and drivers coordinating AFR, while the 5870 has just the 16x PCI-e . Either AFR is more efficient than pumping the game engine through a single GPU (yea right) or the additional PCI-e bandwidth is upping the min frame rate enough to affect the average frame rate.
 
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maybe delay in accessing memory?
I remember reading ages ago that the 128bit card has lower access times to memory than 256bit card but that was in radeon 9700 era so i don't know how it looks now

Well you know people say that multi gpu issues are quite rare but you never know if it won't be your next favourite game that is affected (Dawn of War 2 i think still doesn't use more than one card effectivly).
 
To match a 1GB 5870 you would need two 1GB 5770s. You end up paying for 2GB of ram but only having 1GB effectively usable.

A lot of the upper tier higher end 1GB 5770s are about $190 before rebate. 2x$190 = $380 = 5870.
 
I've heard that the tessellation engine in all the HD5xxx series are the same. If that is the case, wouldn't two 5770's outperform a single 5870 in games that use high tessellation?

I'm not saying that AMD is stupid for not doing dual 5770, just talking about one of the things occupying my little brain.
 
flexcore said:
I've heard that the tessellation engine in all the HD5xxx series are the same. If that is the case, wouldn't two 5770's outperform a single 5870 in games that use high tessellation?

I'm not saying that AMD is stupid for not doing dual 5770, just talking about one of the things occupying my little brain.
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Tessellating engines do not stack or scale in CF like that AFAIK. Please correct me if I am wrong. I also don't know if Juniper and Evergreen are the same like that.
 
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