AMD: R8xx Speculation

[Unknown Soldier]

NCIX has a Gigabyte 5870 listed for 433.99 CAD (price changes to 9999.99 after page load).

Is the description is right, 850Mhz? That's 25Mhz over the 825Mhz I read was the rumoured standard.

 

[compres]

So who is right? Is filtering better or not?

 

[Scrat]

So who is right? Is filtering better or not?

It seems much better...

R600:

G80:

 

[neliz]

So who is right? Is filtering better or not?

Who would want you to believe filtering is not up to nVidia's standard?

 

[fellix]

It seems much better...

R600:
http://images.bit-tech.net/content_images/2007/05/r600_ati_radeon_hd_2900_xt/r600-16xaf.png

G80:
http://images.bit-tech.net/content_images/2007/05/r600_ati_radeon_hd_2900_xt/g80-16xaf.png

The R600's output shown is from an early OGL driver bug, or sort of -- not a good measure for comparison, really.

The G80 sample is default quality, not HQ.

Here is a detailed sequence of different patterns (description in the lower right corner):

 

[AlexV]

The AF wheel is only one measuring stick. It's also incomplete without extensive analysis...just a static shot won't tell you much.

 

[DegustatoR]

Better memory resource management?

If by "better resource management" you mean less memory consumption by DWM then yes. But what's that has to do with game performance?

G80:

That's G80 "Quality" mode with all optimisations on. It's MUCH better than that in HQ mode. Plus I doubt you can tell if AMD's doing any underfiltering with these images. (Or any images actually.)

 

[ferro]

So it's official now? SSAA is back? Or did we already know this?

 

[CarstenS]

Plus I doubt you can tell if AMD's doing any underfiltering with these images. (Or any images actually.)

That's right - you cannot. And frankly spoken, that was a hell of a lot more of an issue than the slightly less than perfect angle dependancy.

 

[Jawed]

There are reasons to use late-Z in such cases, you can contact AMD developer relations for more info.

Do I need to sign an NDA?

You're certain of this? A close look at the reg specs may give more information.

So, two pixel shaders can be running concurrently?

Jawed

 

[fellix]

The AF wheel is only one measuring stick. It's also incomplete without extensive analysis...just a static shot won't tell you much.

We all know this, but it's the easiest way to do a quick comparison. Otherwise, a detailed in-game (w/ multiple titles) analysis is needed to comprehensively evaluate the different quality aspects.

 

[AlexV]

We all know this

I apologize for stating the obvious then.

 

[neliz]

So it's official now? SSAA is back? Or did we already know this?

that's official and well known, I'm missing a MSAA mode from those slides though.

 

[Silent_Buddha]

Oh man, if those slides are true, more AA modes to play with. I think that's the main reason (other than lower idle power) for me to get a 58xx.

AA...yes yes yes yes. Hopefully the SSAA is a decent speed and hopefully it can be easily forced for all games. And it better be at least RGSSAA and not OGSSAA.

Also, wondering if they did anything to increases Edge Detect AA perf? Love that AA mode, but only useable in non-demanding games.

Also, are those slides implying that regular MSAA is going to be twice the performance of 48xx? Double the pixel/clock rate? Or to put it another way, the performance hit from MSAA will be half of the performance of MSAA on 48xx?

Regards,
SB

 

[stevem]

We all know this, but it's the easiest way to do a quick comparison. Otherwise, a detailed in-game (w/ multiple titles) analysis is needed to comprehensively evaluate the different quality aspects.

An option to disable tex filtering optimizations without affecting the rest of A.I. would be useful. I doubt it'll be included. Perhaps via reg key.

And it better be at least RGSSAA and not OGSSAA.

Apparently it's RGSS. No point in OGSS when the investment for sparse sampling in MSAA has been made.

Also, are those slides implying that regular MSAA is going to be twice the performance of 48xx? Double the pixel/clock rate? Or to put it another way, the performance hit from MSAA will be half of the performance of MSAA on 48xx?

Yeah, it appears 2x the sample rate of 4800 series as hinted.

 

[neliz]

Also, wondering if they did anything to increases Edge Detect AA perf? Love that AA mode, but only useable in non-demanding games.

I heard the driver bunnies nod

 

[ferro]

that's official and well known

Publicly? Where?

I'm missing a MSAA mode from those slides though.

The slide only mentions what's new and improved. The performance comparison table to the right mentions MSAA.

Edit: or are you implying there is a new MSAA mode?

 

[no-X]

The SSAA is nothing new. Years ago, when ATi enabled first version of AAA in drivers (at the time of R5xx), some local members revealed a trick how to enable the SS filter not only for alpha textures, but for all textures. I believe ATi just decided to enable this old feature officially :smile:

 

[psolord]

Will it be long now for the first Evergreed reviews? It is already the noon of the 22nd where i live! So, are we going to see full reviews or what? Is there a full NDA lifting today?

 

[itaru]

S3 Graphics Chrome440GTX

http://www.computerbase.de/artikel/...tx/3/#abschnitt_besseres_af_und_treiberstatus