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[Bjorn3D] Review of 9800GTX+ vs. 4850 (SLI as well) - Page 6

post #51 of 58
Quote:
Originally Posted by darkcloud89 View Post
I don't think this can be a definitive statement yet. AMD has not lifted the NDA on the details of the architecture yet so there's not a lot of "official" details. However, ExtremeTech did have the article up prematurely for a little while before they realized it and took it down. While I didn't get the opportunity of reading the entire article, it does mention that the memory interface has undergone significant changes. The ring bus found in r600 is completely gone in favor of spreading the interface around the edges of the chip. If we're talking about a completely new memory interface, that alters the core quite a bit.

I'm still thinking the drivers aren't quite ready yet, and it's was already said that drivers are responsible for the delay of the 4870X2 (until August). I would assume that the HD4850 would have been included in this driver delay as well, but ATI found that it was performing well enough to compete with Nvidia's offerings (which it was). Either way, we'll find out more info in a week or two once the NDA is lifted.

On the other hand, the 9800GTX+ hasn't undergone as substantial changes and the current driver should be a much better representation of future performance than the current ATI driver.
They also completely reorganized the core to fit in the 800SP and dramatically improved the ROPs.
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post #52 of 58
Quote:
Originally Posted by Somenoob View Post
They also completely reorganized the core to fit in the 800SP and dramatically improved the ROPs.
don't forget they doubled the tmu's too
    
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post #53 of 58
Quote:
Originally Posted by Vuelta View Post
don't forget they doubled the tmu's too
That doesn't make as big of a difference because the SP:TMU ratio stayed the same.

Was 320:16
Now 800:40
Still 20:1
post #54 of 58
Who cares if the ratio is the same?

If you have a card with 500MHz on the core and 1000Mhz on the memory, and a new model comes out with the exact same core and memory, but clocked at 1000Mhz and 2000Mhz, the ratios are the same but the performance is doubled (in theory).
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post #55 of 58
Quote:
Originally Posted by Mootsfox View Post
Who cares if the ratio is the same?

If you have a card with 500MHz on the core and 1000Mhz on the memory, and a new model comes out with the exact same core and memory, but clocked at 1000Mhz and 2000Mhz, the ratios are the same but the performance is doubled (in theory).
But you don't need to change the drivers for that to happen. What you said is actually kind of what I was saying.

All I'm saying is the redesigned memory architecture (and improved ROPs according to Somenoob ) are going to require some driver work to get the card fully optimized, and I don't think that the drivers are quite at this point yet.
post #56 of 58
Alright, cool. I thought you meant that as long as the ratios are the same it wouldn't make a difference I need to read closer.
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post #57 of 58
Quote:
Originally Posted by Robilar View Post
These new cards have created a dilemma for me. I was going to go with 9800gtx in TRI-SLI. then the GTX260 was announced and I was leaning towards a pair in SLI. Now with these cards, TRI-SLI may be the right choice again (And 3 of them are still cheaper than a pair of GTX260)
2* 4870> 3 * 9800GTX
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post #58 of 58
Thread Starter 
That works really well with my $350 SLI motherboard...
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