AMD: R9xx Speculation

[mao5]

naked 6970 graphics cards

 

[mao5]

naked 6970 graphics cards

 

[A.L.M.]

Lower than which? $299? No way

Lower than prices shown on that site, I meant.

 

[fellix]

naked 6970 graphics cards
<snip>

Will the 6950 SKU use vapor chamber, too?

 

[racca]

and ati have their own CSAA now, how many AA modes does that make..

Not as many as you think.
CSAA is a mixture of AA q0,q2&q4, the AA factor denotes coverage sample not the underlying MSAA mode, eg. 16xCSAA = 4xMSAA(q4)
EQAA is simply MSAA set to q=2.




All in all, AMD traded 16xCSAA for 2xEQAA which I think is marginally better, since 16xCSAA is literally no better than 8xCSAA, while 2x EQAA might prove to be useful when you can't afford 4x MSAA.

 

[trinibwoy]

And all that with fewer shaders.

Theoretical shader throughput is about the same plus a decent bump in bandwidth and fillrate.

 

[ZerazaX]

Amazing that naked pics only show up with 2 days left... must be some kind of record for how late these showed up

 

[cho]

Not as many as you think.
CSAA is a mixture of AA q0,q2&q4, the AA factor denotes coverage sample not the underlying MSAA mode, eg. 16xCSAA = 4xMSAA(q4)
EQAA is simply MSAA set to q=2.




All in all, AMD traded 16xCSAA for 2xEQAA which I think is marginally better, since 16xCSAA is literally no better than 8xCSAA, while 2x EQAA might prove to be useful when you can't afford 4x MSAA.

2x EQAA = 2 color samples + 4 coverage samples =/= 16x CSAA = 4 color samples + 16 coverage samples, The 4MSAA is a much better AA mode for a 2GB card compare to 2xEQAA.

 

[DavidGraham]

These are the slides no-X was talking about :

 

[cjo]

Pelative Crossfire Shading?

edit: Should really check for mistakes when posting about mistakes.

 

[psolord]

These are the slides no-X was talking about :

Wow! Great crossfire scaling on the 69XX!

 

[ferro]

Wow! Great crossfire scaling on the 69XX!

That bodes well for Antilles / 6990.

Also: more than 200% for Lost Planet 2? Isn't that a bit....unlikely?

 

[DavidGraham]

That bodes well for Antilles / 6990.

Also: more than 200% for Lost Planet 2? Isn't that a bit....unlikely?

4 Tessellation Engines apparently fare better in this game than 2 .

 

[no-X]

That bodes well for Antilles / 6990.

Also: more than 200% for Lost Planet 2? Isn't that a bit....unlikely?

I remember, that Eric Demers once explained, that some caches are effectively doubled in CF, so in some rare cases performance can be a bit more than double. Anyway, I have no idea if this is the case...

 

[DavidGraham]

Now it is becoming obvious that HD 6970 will be about 5-10% faster than GTX 480/570 , which puts it about 10% slower than GTX 580 (@1920x1200 ,4XAA) , this percentage will most likely shrink when 8X AA is used .

Still , we don't know about HD 6970 performance @2500x1600 resolution , the performance gap may actually change (shrink or increase) , I am hoping the increased frame buffer and memory bandwidth will be put to more use there , shrinking the gap even more .

 

[no-X]

It seems to be likely, HD5870 2GB and GTX480 at 2560*1600/AA8x perform almost exactly:

http://www.hardware.fr/articles/806-23/dossier-nvidia-geforce-gtx-580-sli.html

 

[Kaotik]

Pelative Crossfire Shading?

Scaling, you mean
But indeed, "Pelative", and "CrossFireX" is written twice as "CrossfireX"

 

[rpg.314]

Wow! Great crossfire scaling on the 69XX!

Sideport FTW?

 

[chavvdarrr]

Sideport FTW?

"Lasciate ogne speranza, voi ch'intrate"

 

[entity279]

Sideport FTW?

Unlikely, otherwise there would have been slides boasting just that.

Even if not leaked explicitly, I expect they would have been mentioned by now.

Right, neliz ?