ATi HD4850 RV770 - An Architectural Overview - Rage3D Article

***Lupine*** · Jun 25, 2008, 02:07 AM

RV770 Launch Day is here! Join Rage3D for the first in our series of Launch Day articles: ATi HD4850 RV770 - An Architectural Overview

As an opener to our launch day coverage, we'll be taking a plunge into the RV770 and seeing what what is new, what has changed, what stays the same (quickie note: not much) and how it all fits together. We'll also check and see if we can actually achieve the theoretical numbers using a number of synthetic tests ... don't worry, the whole gaming enchilada will soon follow, we haven't lost our focus.

ATi HD4850 RV770 - An Architectural Overview

**jima13** · Jun 25, 2008, 02:49 AM

Another fine article, thanks guys!

Peter-Jensen · Jun 25, 2008, 02:53 AM

Nice!

revan · Jun 25, 2008, 05:07 AM

Quote:

Originally Posted by Lupine

RV770 Launch Day is here! Join Rage3D for the first in our series of Launch Day articles: ATi HD4850 RV770 - An Architectural Overview

As an opener to our launch day coverage, we'll be taking a plunge into the RV770 and seeing what what is new, what has changed, what stays the same (quickie note: not much) and how it all fits together. We'll also check and see if we can actually achieve the theoretical numbers using a number of synthetic tests ... don't worry, the whole gaming enchilada will soon follow, we haven't lost our focus.

ATi HD4850 RV770 - An Architectural Overview

great work guys!

keep working (ups.. sorry, we all celebrate and you...) -

- but THE SPICE MUST FLOW!

AlexV · Jun 25, 2008, 05:41 AM

Quote:

Originally Posted by revan

great work guys!

keep working (ups.. sorry, we all celebrate and you...) -

- but THE SPICE MUST FLOW!

Yes Baron, yes.

revan · Jun 25, 2008, 06:07 AM

Quote:

Originally Posted by Morgoth Bauglir

Yes Baron, yes.

Ok, Melchor. do else and I will give you a one-way ticket to Gedi-Prime!

SIrPauly · Jun 25, 2008, 06:18 AM

Writing is improving -- to actually enjoy a technical read is hard to pull off, thanks!

MrTexTure · Jun 25, 2008, 06:19 AM

Nice looking forward to read all about these super cards

TheNGTV · Jun 25, 2008, 06:41 AM

Quote:

Beyond3D's sexy overlord Rys

Great writeup!

Now, the next step is to quantify your Hyperlight results with Bit-Tech's GT200 tests, considering the RV770 is not the only chip to improve in this situation (but the 670 was quite competent in this segment anyway)

The RBEs and ALUs definitely look like solid work. (The new "bus" however, does not look like a crossbar either) Sideport CF is something I'd like to see touched heavily in the future.

Oh, and thanks MUCH again!

demowhc · Jun 25, 2008, 06:57 AM

great read thnx a lot!

AlexV · Jun 25, 2008, 07:03 AM

Quote:

Originally Posted by TheNGTV

Great writeup!

Now, the next step is to quantify your Hyperlight results with Bit-Tech's GT200 tests, considering the RV770 is not the only chip to improve in this situation (but the 670 was quite competent in this segment anyway)

The RBEs and ALUs definitely look like solid work. (The new "bus" however, does not look like a crossbar either) Sideport CF is something I'd like to see touched heavily in the future.

Oh, and thanks MUCH again!

It's faster at GS, at least by the numbers I've seen. Once I get a GT200 I'll be able to tell you for sure.

The mem-bus is what i said it is

. We'll be looking at it more in-depth once the 4870 gets here, as it's one of the juiciest morcels in the RV770.

sireric · Jun 25, 2008, 09:04 AM

One little correction on a misconception: The design and architecture teams for the 770 are the same as the 600. There is no seperate "xenos" design team.

AlexV · Jun 25, 2008, 09:09 AM

Quote:

Originally Posted by sireric

One little correction on a misconception: The design and architecture teams for the 770 are the same as the 600. There is no seperate "xenos" design team.

I worded that badly, as I understand that pretty much all of your offices were involved. But Orlando was at the forefront for this one, and they were also at the forefront of Xenos so that was the connection. If it's still an incorrect interpretation I'll adjust it.

SIrPauly · Jun 25, 2008, 09:10 AM

Quote:

Originally Posted by sireric

One little correction on a misconception: The design and architecture teams for the 770 are the same as the 600. There is no seperate "xenos" design team.

Nice to see a "perfect storm" but in a positive sense!

sireric · Jun 25, 2008, 09:21 AM

Quote:

Originally Posted by Morgoth Bauglir

I worded that badly, as I understand that pretty much all of your offices were involved. But Orlando was at the forefront for this one, and they were also at the forefront of Xenos so that was the connection. If it's still an incorrect interpretation I'll adjust it.

Orlando were at the forefront to lead the design teams (and thanks to Scott as the chip lead), but all the designers from R600 participated in the 770, in mainly the same way as they did on R600. No new team was brought on.

AlexV · Jun 25, 2008, 09:25 AM

Quote:

Originally Posted by sireric

Orlando were at the forefront to lead the design teams (and thanks to Scott as the chip lead), but all the designers from R600 participated in the 770, in mainly the same way as they did on R600. No new team was brought on.

Ok, thanks!

Dave Baumann · Jun 25, 2008, 01:41 PM

w00t!

Nice job guys!

Sound_Card · Jun 30, 2008, 08:23 AM

I think the biggest surprise was the over all densisty of the chip as compared to RV670.

A quick question, was their any changes to the ultra threaded shader dispatcher? Are each SIMD still set up with dual arbitars/sequencers like R600?

HonestJohn · Jun 30, 2008, 10:08 AM

Quote:

Originally Posted by sireric

Orlando were at the forefront to lead the design teams (and thanks to Scott as the chip lead), but all the designers from R600 participated in the 770, in mainly the same way as they did on R600. No new team was brought on.

Great article Rage3D, it looks like you burned the candle on both ends to get that one done. Incedible Detail. Thanks for the time and effort.

Hey sireric. Big Congrats to you and the team on the on the success of the HD4800 Series.

I was wondering if you could comment on the possibility of built-in fan control for the CCC that Sound_Card had mentioned in another thread and when we can expect to see it? Please?

Jun 25, 2008, 02:07 AM	#1	Advertisement (Guests Only) Login or Register to remove this ad
*Lupine* Administrator Join Date: Sep 2002 Location: Graham, WA Posts: 25,399	ATi HD4850 RV770 - An Architectural Overview - Rage3D Article RV770 Launch Day is here! Join Rage3D for the first in our series of Launch Day articles: ATi HD4850 RV770 - An Architectural Overview As an opener to our launch day coverage, we'll be taking a plunge into the RV770 and seeing what what is new, what has changed, what stays the same (quickie note: not much) and how it all fits together. We'll also check and see if we can actually achieve the theoretical numbers using a number of synthetic tests ... don't worry, the whole gaming enchilada will soon follow, we haven't lost our focus. ATi HD4850 RV770 - An Architectural Overview __________________ In my many years I have come to a conclusion that one useless man is a shame, two is a law firm, and three or more is a congress. - John Adams Not because of who I am, but because of what You've done ~ not because of what I've done, but because of who You are. - Casting Crowns

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Jun 25, 2008, 02:53 AM	#3
Peter-Jensen Radeon HD 4550 Join Date: Jun 2008 Location: Næstved Posts: 49	Nice! __________________ New system : Intel Core™ 2 Quad Q9300 @ 3.0Ghz - 8 GB Corsair TWIN2X 6400C5DHX DDR2 - 3 x Raptor 150GB - Gigabyte x38 QuadGT - 2 x Sapphire HD4870 CrossFire

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Jun 25, 2008, 02:49 AM	#2
jima13 Moderator Join Date: Nov 2000 Location: La Grande, Oregon Posts: 4,839	Another fine article, thanks guys!

Jun 25, 2008, 06:18 AM	#7
SIrPauly Did someone say, RGSSAA? Join Date: May 2001 Location: New England Posts: 8,987	Writing is improving -- to actually enjoy a technical read is hard to pull off, thanks!

Jun 25, 2008, 06:19 AM	#8
MrTexTure Radeon HD 4830 Join Date: Mar 2004 Location: Sweden Posts: 181	Nice looking forward to read all about these super cards

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Jun 25, 2008, 06:57 AM	#10
demowhc Rage3D Scrub Join Date: Sep 2007 Location: Melbourne Posts: 2,590	great read thnx a lot!

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Jun 25, 2008, 09:04 AM	#12
sireric ATI Guru Join Date: May 2002 Location: Bay Area, CA. Posts: 1,918	One little correction on a misconception: The design and architecture teams for the 770 are the same as the 600. There is no seperate "xenos" design team.

Jun 25, 2008, 01:41 PM	#17
Dave Baumann ATI Guru Join Date: Sep 2001 Posts: 434	w00t! Nice job guys! __________________ "Wavey" Dave Expand. Accelerate. Dominate. ATI Radeon HD 5800 Series Graphics Cards - Designed by the Community

Jun 30, 2008, 08:23 AM	#18
Sound_Card Rage3D Veteran Join Date: Apr 2006 Location: L2 Cache Posts: 9,729	I think the biggest surprise was the over all densisty of the chip as compared to RV670. A quick question, was their any changes to the ultra threaded shader dispatcher? Are each SIMD still set up with dual arbitars/sequencers like R600? __________________ "It is the Case that we put a bunch of die area into double precision floating point, a bunch of die area into ECC. And for gaming graphics applications, those give us less returns then they do for the scientific applications." -Bill Dally, Nvidia Corp. Chief Scientist. "Nvidia is a software company." -Jen-Hsun Huang, Nvidia Corp. CEO.

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