AMD Cayman info (or rumor)

[generics_user]

i dont think the 6970 will be much faster (if ever...) than the 580.. the "crude algebra" which was pointed before, gives us 1920/4=480SPs*900mhz / 512SPs*772 = 1.0929 ~+9.3% theoretical advantage, if add the rumor about having trouble for target frequencies, and settle for 850mhz.. then its 480*850 / 512*772 = 1.0322 or a mere 3.2% theoretical advantage.. which in actual performance bonus will be negligible. (In fact if comes out with 850mhz clock i strongly believe it may be a tiny slower though..)

only problem with your math is that GTX580 shaders run at over 1.5ghz

[Kaboka]

Didn’t some old rumor state that the 69xx might have a small size of memory directly on the core just like the xbox360 GPU? How will this factor into the performance or was this rumor killed?

[SicKlown42012]

Didn’t some old rumor state that the 69xx might have a small size of memory directly on the core just like the xbox360 GPU? How will this factor into the performance or was this rumor killed?

It's been said that Cayman has an off-chip buffer for tessellation. We don't know how exactly that will effect performance, but AMD wouldn't waste space(and drive up cost) if it didn't benefit it noticeably.

[MirageSys]

It's been said that Cayman has an off-chip buffer for tessellation. We don't know how exactly that will effect performance, but AMD wouldn't waste space(and drive up cost) if it didn't benefit it noticeably.

However the inclusion of the sideport to the R700 shows that they are willing to leave a design intact even without substantial (or noticeable) benefit. I wouldn't count on the tessellation buffer giving that much of a gain, but its certainly possible.


I would think it would have an impact on minimum framerates above all else, but I could easily stand corrected.

[Heinz68]

When it comes to performance estimates I prefer to be conservative and if the product turns out to be much faster that's a nice surprise.

I think if the HD 6970 with smaller die size can be as fast as GTX 580, that is a win for AMD and if the HD 6970 turns out to be faster than GTX 580 that's a big bonus for AMD