The NEXT LAST R600 Rumours & Speculation Thread

I know, but default its not available,the picture with the results are resized, so its grain of salt as everything else

 

Yes not in game, but via config-tool:

 

Nice to be passed as an ex-Beyond3D mod btw... I must've worked and fought in the shade all this time

 

Hmm FEAR at those settings with a GTX gets well over 100 fps, probably around 115 FPS actaully, just checked out FEAR extraction point, I'm getting a good 105ish

 

Aren't those numbers kinda low for FEAR? I thought this guy said that the HD 2900xt "totally smash" the GTX?

 

Slightly OT, but has there been any word/leaks on RD790 + Agena FX samples from Tunis and such samples being seeded to reviewers as a testing platform for R600 or at least RD790 for R6 Crossfire/(QuadFire?)/Stream Computing reviews?

 

That was mao5 - different chinese source I think.

 

But they are coming from the same forum. chiphell.com

 

Oh right. Just realized mao is a "technical advisor" there. The smileys are funny as hell on that forum

 

DailyWho?


















Me DailyTech, Me Tuan.

 

Okay, I have a question.

Does anyone know yet for sure if R600 is going to support the same digital-audio-movie-soundtrack-passthrough-via-HDMI feature that we're supposed to get on RV6xx? Initial rumours were that the R600 chip didn't have this feature at all. Later rumours suggested that it did. However, still-later rumours suggest that the board design for R600 cards includes only HDCP-enabled DVI outputs, not HDMI (with HDMI compatibility only via an external dongle). If that's correct then (I think) it means that R600 cards won't be able to output audio over HDMI at all.

Can anyone confirm or deny any of that?

 

Well, not exactly. DT got 79 fps, but they had 16AF as oppoused to 8.

 

That's from the XTX article. They got 84fps in their original XT article. And yeah they had 16xAF enabled.

 

Correct me if I'm wrong (which I usually am in most cases)

2600
120 SPUs (24 Vec5)
8 TMUs
4 ROPs

2400
40 SPUs (8 Vec5)
4 TMUs
4 ROPs

 

I seriously hope 2600 will have 8 ROPs, how can they make the same mistake again?

 

There is something that we have no clue about (yet) which seems to be consuming significant space in all the parts. Looking at the size of RV630, in a simple world should be enough for 'half R600'. However if they can manage to squeeze only 120 SPUs (& 4 ROPs) then I wonder what size would end up as 'half R600' on 65nm.

P.S. I think UVD as the likely culprit was already discussed some where around here.

 

Well UVD + Audio departments takes the same space from all 3 chips, does RV610 follow the same "it should have more" pattern?

 

I'm coming

 

Instruction Packing

I've been musing over the organisation of R600's ALU pipeline.

The diagram shows a fat yellow unit sitting beside 4 skinnier yellow units. It's worth noting that those skinny units are disjoint, they're not a single ALU.

The implication here is that R600 is capable of issuing five separate scalar instructions per clock, per pixel (or vertex or primitive).

So, I propose that the fatboy slug is a combined special function and MAD ALU and its weedy cousins are boring old MAD/MUL/ADD ALUs.

So, it's time to roll out my super-nasty code fragment, for one last time (?) :

​

Note, that's the revised version with a DP3 at the end, not a RCP as I did originally.​

​

R600 doesn't get much chance to stretch its legs on this code, because the instruction dependencies are tighter than a slug's arse. But you should be able to see a bit of instruction-component jiggery-pokery going on in cyles 3 and 4.​

Note I've clocked the pipeline at 800MHz on the basis that in theory there'll be such a thing (whose peak capability is 512GFLOPs)...​

For comparison, R580:​

​

And Xenos:​

​

Even though the FLOPs utilisation of R600 is only marginally higher than R580 (and it's the same as Xenos), you can see that the per-component utilisation is much higher. Summarising utilisation on the basis of components:​

• R600 = 80%​
• R580 = 52.5%​
• Xenos = 70%​

Jawed​

 

Wow, the I didn't know R600 numbers were THAT good!