AMD: R7xx Speculation

[Sound_Card]

I also ask what's that ?

Most likely just marketing. At least it comfirms that RV770 is a terrafloper.

 

[Shtal]

Going in packs of three probably doesn't make much sense. DX9 pixel shaders were all designed for dual issue vec3 + scalar or dual issue vec2s. They went with five because of vertex shaders (typical vec4 + 1) but if they were designing with only pixel shaders in mind, I would guess four (or two?) would be the ideal number since a lot of stuff could still be packed into four.

Regardless, it's extremely doubtful there'll be any change to the ALU structure this time around.

Could you please explained how 64 Stream Processor GF9600GT could match or surpass Radeon 3870 in performance; If your response is because TMU's limitation, I would agree partially.

 

[Geeforcer]

So in RV770 the shader core is going to be clocked higher then the the rest of the GPU?

 

[HAL]

http://bbs.expreview.com/thread-12644-1-1.html

 

[Kaotik]

http://bbs.expreview.com/thread-12644-1-1.html

http://www.expreview.com/img/news/2008/05/27/GT200-VS-RV770.png

Already posted on last page, and it has mixed up TMUs and ROPs on GF's apparently

 

[D3B]

The ATI looks better with it's lower price and lower power use.

 

[AlphaWolf]

I rather doubt the 4870 is 65nm.

 

[Arun]

The R7xx part looks extremely dubious to me...

 

[Lukfi]

=>Kaotik: Mixed up? Why? I think 32 ROPs goes very well with a 512bit bus, and 28 to 448bit bus respectively.

 

[Tchock]

How does AMD define FLOPS anyway? Seems extremely strange.


1TFLOP = 480*1050M*2 <------ What??

 

[Lukfi]

If I understand it correctly, each of the 480 units is MADD meaning they can do multiply and add in one clock. Therefore 2 FP operations.

 

[mao5]

Radeon HD 4870 GDDR4 ES On Sell Now！

http://www.pczilla.net/en/post/25.html

 

[MistaPi]

Anyone know the latency on the GDDR5 memory 4870 will use and the latency on the GDDR3 memory GTX280 wil use, and how that will affect the "practical bandwidth"?

 

[w0mbat]

And again, wrong specs for RV770.

 

[G-UNIT91]

And again, wrong specs for RV770.

hi to all,

I'm italian and are newbie

I wanted asked a question

w0mbat, you have a ATI 4870 ES?


THX

 

[whocares]

And again, wrong specs for RV770.

What specifications are wrong ?

 

[w0mbat]

U´ll see when its launched
e.g. some of the clks are wrong and they wrote an exact TDP (114/157W) but this isnt the exact TDP.


@G-UNIT91: No, i dont have any RV770 ES.

 

[Arun]

Hmmm, if I combine a few of the rumours... 625*800*2 = ?

 

[sauron]

How does AMD define FLOPS anyway? Seems extremely strange.


1TFLOP = 480*1050M*2 <------ What??

R600 dispacth processor passes to shader core 2 thread batches per clock/cluster. So ATi declares its sps can (theoretically) run two threads per clock.

 

[MfA]

Sauron, it's because of the multiply-add as Lukfi said.