R520 512bit PCIe/AGP

mozzartusm · Aug 21, 2005

Quoted from ShadowMage

R520 will be the newest generation high <something> GPU. There will be 3 types: XT, XL and LE. They will run at 600/700, 500/500, and 450/250, respectively. No info on pipelines, we only know that the memory bus will be 512bit.

RoadMap here <A HREF="http://www.hkepc.com/bbs/viewthread.php?tid=451065" target="_new">http://www.hkepc.com/bbs/viewthread.php?tid=451065</A>

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Action_Man · Aug 22, 2005

Wavey Dave at beyond3d has said no to a 512bit bus. I don't think we'll see it either, it'd be too expensive.

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Not really good for anything but you cant help smile when you see one tumble down the stairs.

pauldh · Aug 22, 2005

As nice as that sounds, I think you are right. Too expensive. Could explain how a R520XL clocked 500/500 could beat the 7800GTX

(*Paul hopes*)

<A HREF="http://service.futuremark.com/compare?3dm05=658042" target="_new">3DMark05</A> <A HREF="http://service.futuremark.com/compare?2k3=3781954" target="_new">3DMark03</A>

TheGreatGrapeApe · Aug 22, 2005

I hate to say I agree, as it would be what the next gen cards ARE missing and what I've advocated over simply getting more exotic memory all the time, but I do agree that the price is somewhat of an issue.

The only current cards with 512mb memory bus (outside of the core) is the Realizm series, and they are far from cheap. How much it would cost to support it on the chip (tansistor wise) and the board (layer wise) is the real question. You could have rediculous bandw1dth with 400 MHZ plain 2.5nsDDR (like that used on some FX5200U).

Eventually they may have to go that route unless they can get XDR for cheap. Imagine if the G70 WAS a 32 pipe card, what kind of memory restrictions that would have, heck even now I'd say it's b@ndwidth limited.

Everyone says it's expensive and I would've bought that when people were poo-pooing $399 cards, but now paying $700 for single cards and $1000+ for two is actually a reality, so what is 'too expensive'? And is it really THAT much more expensive than trying to squeeze ever more power out of the memory limited cores. Either they need to move to geater bitwidth, cheaper-faster memory, or better memory compression. We'll see how long before they need all three.

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mozzartusm · Aug 22, 2005

Pictures of the core <A HREF="http://www.xtremesystems.org/forums/showthread.php?t=72085" target="_new">http://www.xtremesystems.org/forums/showthread.php?t=72085</A>

If you scroll down to the bottom you will see a pic of the R520 up next to the G70

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mozzartusm · Aug 22, 2005

Page 2 they are saying that it looks to be 32 pipes

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mozzartusm · Aug 22, 2005