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Nvidia's dual chip card waits for Antilles

drunkenmaster said:
In general two times full 512sp cores at say with a 6% lower clock would almost certainly use less power than 2 480sp cores with a 6% higher clock, both offering similar performance.
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But maybe they can use a much lower GPU voltage when using 480SP's by disabling the ones that can't work at a low voltage?
 
drunkenmaster said:
Skyrocket, as Phoenix said, re-releasing a respin to get full yields a full year later is not turning corners, its honestly a little pathetic(if they'd done a full respin after the first cores came back last July/August, they could have had the "580gtx" for April, it was instead their insistance on doing a full respin but praying a basic spin, 3 times, would fix the problem that took longer anyway and resulted in a non 512sp final part.

Nvidia lets see, don't have a low end part for Fermi, their mobile stuff is doing horribly as the power requirements for all the mobile Fermi's are ridiculous. In the meantime they've firesaled their midrange to gain a little marketshare, which are bigger than 5870's in size and cost yet sold for less than a 6850.

What corner did they turn exactly?

As for Duff man, theres quite literally no reason to assume Cayman won't match Cypress for power per watt. Its incredibly rare for a new architecture to offer worse performance per mm2 and per transistor, infact I'm not sure I could name one.

Nvidia also hasn't really improved power efficiency. A 260gtx offers worse power efficiency than a 280gtx, a 5850 worse than a 5870, a 5750 worse than a 5770, etc, etc. A full core with bits disabled offers worse power efficiency, thats simply how life works. We've seen that a 580gtx in furmark with the power limiter turned off uses noticeably MORE power, about exactly what you'd expect in reality. In general gaming improved performance with less waste from a cluster turned off.


Thats really not here nor there though, not a new architecture, marginal power efficiency gains, 90% of which are just being a fully enabled core rather than improved anything.

If Cayman uses the same amount of power, the same amount of shaders and offers 20% better performance, it would you know, have 20% better percieved power efficiency.

Assuming its a 2GB card, then memory power should go up on its own, we'll have to see, the actual shaders/rops/everything else would almost certainly be improved in a new architecture, thats just how life tends to work. More memory can alter the exact power draw, double density chips with a bigger power draw and higher speed, higher voltage could use an extra 10% power, which could drop the overal power efficiency. But then compare power vs a 2gb 5870 and you'd see the probably efficiency increase.
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You forgot to mention Nvidias total disaster with it's mobile gpu's due to using a weak die/packaging resulting in a massive number of warranty claims.
 
The new 460's are slightly refined gpu's are they not - would it not be possible that Nvidia could use faster version of that gpu on a dual core board?
 
Rroff said:
Cheapest GTX470 you can find, uprate the cooling, stick 1.1v on the core and clock it to GTX580 performance :P - bit of a gamble but most should get there with good cooling and ~1.1v.
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I was tempted to blag a cheap 470 for my spare pc but having just spent 220 quid getting the car serviced that idea has gone out the window :(
 
At least these are seemingly going to be single pcb variation instead of the usual vhs cassette tape wannabe's. Next few months looks very interesting :)
 
Rroff said:
Cheapest GTX470 you can find, uprate the cooling, stick 1.1v on the core and clock it to GTX580 performance :P - bit of a gamble but most should get there with good cooling and ~1.1v.
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You would need sub zero cooling and >1000MHz core speed on a GTX470 to match a stock clocked GTX580. A 580 is 20% than 480, which in turn is 25% faster than GTX470.
 
555BUK said:
You would need sub zero cooling and >1000MHz core speed on a GTX470 to match a stock clocked GTX580. A 580 is 20% than 480, which in turn is 25% faster than GTX470.
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At the same clockspeeds a 580 is a few percent faster than a 480, at stock clocks, there's a wider gap but it's not a blanket 20%.
 
Havent Asus already released a dual Fermi card ?

Used the the crappy ( Very poor SLI performance ) nForce 200 PCI-E switch IIRC.
 
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