The NEXT LAST R600 Rumours & Speculation Thread

Yeah I'd be surprised at 256KB cache per cluster. G80 has what, 128KB of L2 for the whole chip?

In terms of filtering - that 4xFP32 number - does that mean 4 FP32 bilerps per engine per cycle?

 

128KB doesn't divide by 6 (memory channels) very well, so I suspect it's some other quantity. I don't remember seeing an official specification for this. But I imagine it's somewhere in the 10s to 100s, simply because this cache covers all purposes, TMUs + vertex fetch + ROPs - though I am guessing, because I don't remember seeing anything official.

It says every 2 clocks.

If you look at G7x, it can do Int8 and FP16 filtering. But it can't do fp32 filtering. It can only fetch fp32 texels. So, historically, TMUs aren't necessarily fully orthogonal.

This seems to be stating that R600's TUs (like G80's) are fully orthogonal. The rates are the same for both, single-cycle fp16 or 2-cycle fp32.

It's kinda puzzling because of the presumption that fp32 filtering wouldn't be a feature of R600 (mostly my presumption, to be fair). This is the one option in D3D10 - but I'm having real doubts about that now LOL.

Jawed

 

Well at least we won't have to suffer the case of the missing MAD with R600! Anybody find G80's MUL yet? According to the B3D article it could be inline with the SF unit as well but that doesn't seem to be holding back R600 from exposing it.

 

They do SF a bit differently from each other. And you can use the MUL in G8x for general shading, just with certain drivers, seemingly certain hardware, the wind blowing in the right direction and an instruction stream written by the bastard offspring of Humus and Jawed.

 

Many of these have been probably said here already, but what the heck, what some people have said about the benches & R600 performance, cut/paste job from another forum

 

Nice sum-up Kaotik, breaks down all the leaks quite nicely.

 

Don't forget Gibbo's and CJ's comments as well.

Anyways, nice sum up and that put things a better light for sure. I have all of Komb quotes lol.

 

I'd love to see that instruction stream...

Jawed

 

Lol, hadn't seen these before. I guess DT isn't very popular with the guys under NDA huh?

 

FEAR 1.08
1280*1024 4AA 8AF soft shadow OFF

HD 2900XT



source

 

Sorry guys, I didn't read the whole thread. But just one small question: At this point, is the XTX gonna be released with the XT? A rumor indicates that the XTX has been pushed to the third quarter.

 

From what I've learned, the XTX, we've come to know in its current form, 1GB GDDR4, has been canned. However, since ATI has yet to use the XTX suffix, it will probably return later on.

 

We don't attend product launch events because we never sign NDAs. We have no interest in the events.

DailyTech is not a review site. We are a news site and only that. We do not write reviews. We simply obtained the cards, ran benchmarks and presented our results. If it were a review we would've analyzed the results, drawn a conclusion and recommended a product. Instead it was a "heres what we know, here are our numbers" article.

And Ryszard hasn't threatened me with a gun yet so I'm pretty sure he still s me.

 

That's exactly what DT got. But they claimed to have 4xAA enabled along with soft shadows.

 

Well earlier in this thread there is a special procedure to turn on softshadows with AA on, so most likely DT didn't do that. I know I didn't when I ran those overclocking tests on the g80, didn't even realize the softshadows weren't working till someone pointed that out.

 

Yes, it has to be done in the special order and everytime the application is restarted. One has to watch the benchmark to see that SS is truly on, otherwise it may be off (due incorrect order/not pressing OK twice for setting to stick).

Here is the trick if it's for use for anyone, to compare.
http://i176.photobucket.com/albums/w193/NebulasPhotoPocket/CheapExampleRetouched.jpg

 

The game not have 1280x1024 resolution in the options menu.

 

What?

 

You can set resolution that goes above the menu options in the the config file.

 

Not only that but we've had countless reviews with FEAR benchmarks at that resolution. Seems kind of silly to claim that the game isn't capable of that res at this point.