It's a 90 nanometre chip with GDDR4 memory support and that it is diss-unified marchitecture and that it is taped out but a release date is an enigma caught in a graphics processor engine dilemma.
Citiraj:
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The first working sample of a chip carries A0 revision, while companies usually launch A2 revisions commercially. It usually takes several – up to 10 – weeks to build a new chip revision, which means that it is unlikely that the G80 would be production-ready by September.
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The arrangement of the chip, it is about a 400mm die. One of the reasons it is so big is the whole dual core rumor that has been floating around.
G80 is not going to be a converged shader unit like the ATI R500/XBox360 or R600, it will do things the 'old' way.
nVidia is heavily downplaying the DX10 performance, instead shouting about DX9 to anyone who will listen. If the G80 is more or less two 7900s like we hear, it should do pretty well at DX9, but how it stacks up to R600 in DX9 is not known.
R600 should annihilate it in DX10 benches though. We hear G80 has about 1/3 of it's die dedicated to DX10 functionality.
The G80 chip now looks like a late 2006 chip and it will fight the R600 beast also scheduled for a very late 2006, when even the mice slumber.
It should hold the performance crown until ATI's RD600 is released sometime around November/December. The G80 is shaping up to be a patchy part.
In some things, it may absolutely scream, but fall flat in others. The architecture is looking to be quite different from anything else out there, but again, that may not be a compliment. In either case, before you spend $1000 on two of these beasts, it may be prudent to wait for R600 numbers.
Izvor:
Inquirer,
MVKTech,
AnmarTech i
X-bit Labs