PDA

View Full Version : technical PS3 info from GDC - RSX based on NV47


Pages : [1] 2

suburbanguy
03-29-06, 03:46 PM
http://www.watch.impress.co.jp/game/docs/20060329/3dps3.htm
http://ps3forums.com/viewtopic.php?t=18987
http://forums.e-mpire.com/showthread.php?t=54081
http://www.ga-forum.com/showthread.php?t=92548


- PPE has 128 VMX registers now, and a dot product instruction (I think).

6 SPEs are available to applications - as speculated/expected by many, a SPE is reserved by the OS.

For the first time, Sony references the architecture RSX was based on specifically - the NV47. 24 2D texture lookups simultaneously = 24 pixel pipelines. 384 flops/clock.

Two models for RSX programming:

PSGL - high level
libgcm - low level, to the metal

I'll update as I get more out of Google.
___________________________________________


the important info is the confirmation that PS3's RSX GPU is based on the NV47 (G70)

|MaguS|
03-29-06, 09:32 PM
Insted of google, trying getting a reliable source... Nvidia said the RSX was based off the G70, and SPE's have nothing to do with the GPU. They are part of the CELL CPU and 7 are available, not 6.

Bad_Boy
03-29-06, 09:44 PM
chill Magus, this is pretty reliable info from japan. even though it says NV47, it doesnt mean a 6800, it means "6800 family" which includes 7800's, which is also a G70. nvidia can be iffy about the naming schemes sometimes.

http://img526.imageshack.us/img526/7506/rsxnv471qy.jpg

and about the 6 SPE's, its 7 SPE's total, and 1 dedicated for the OS. and ofcourse the 8th left out for production issues.

suburbanguy
03-29-06, 10:37 PM
Insted of google, trying getting a reliable source... Nvidia said the RSX was based off the G70, and SPE's have nothing to do with the GPU. They are part of the CELL CPU and 7 are available, not 6.


MaguS, no, they ARE a reliable souce, that's the point.


they were talking about PS3 as a whole, Cell and RSX. they were *not* saying there're SPEs in RSX (because there's no SPEs in RSX) they were talking about CELL's SPEs *and* the NV47-based RSX.

RSX = modified NV47 / G70 / G71

the CELL CPU in PS3 has 7 SPEs, but only 6 are usable for anything, the 7th is for the OS and the 8th one, if it is there at all, is totally inactive.

MUYA
03-29-06, 11:21 PM
IIRC G70 was the new code name NV came up for NV47 when they decided they would use new code bumbers blarggghh thing

|MaguS|
03-30-06, 07:23 AM
The 8th is inactive and only there to give higher yields. As for the dedicated SPE must have been added in the later devkits (I used the nasty big box) since all were available for applications during my time with EA.

As for the whole G70, never knew it was called NV47... Always saw it called the G70, oh well. Its still based off the 7x00 series.

Mr. Hunt
03-30-06, 08:13 AM
The 8th is inactive and only there to give higher yields. As for the dedicated SPE must have been added in the later devkits (I used the nasty big box) since all were available for applications during my time with EA.

As for the whole G70, never knew it was called NV47... Always saw it called the G70, oh well. Its still based off the 7x00 series.

Personally I don't care if it is based off the Voodoo 3000... if it can produce graphics like MGS4 and has great games, it will be a fantastic purchase.

ArturNOW
03-30-06, 08:52 AM
Insted of google, trying getting a reliable source... Nvidia said the RSX was based off the G70, and SPE's have nothing to do with the GPU. They are part of the CELL CPU and 7 are available, not 6.
N47 and G70 is the same GPU. M$ Vista recognize GeForce 7800/7900 cards as NV47... guess why 'cause I've got no idea (nana2)

|MaguS|
03-30-06, 09:05 AM
N47 and G70 is the same GPU. M$ Vista recognize GeForce 7800/7900 cards as NV47... guess why 'cause I've got no idea (nana2)

Good job on keeping up with the thread...

ArturNOW
03-30-06, 09:55 AM
Good job on keeping up with the thread...
sorry but banana is still dancing (nana2)

harl
03-30-06, 10:44 AM
It's me or 22.4 GB/s for the video RAM it's too slow,
(if the want 1080p and/or HDR)
http://www.watch.impress.co.jp/game/docs/20060329/3dps303.jpg
It's like a 7800 GTX 512 with the RAM of a 7600 GT :thumbdwn:

Any way,stil unknwon the number of pipes of RSX

H3avyM3tal
03-30-06, 10:51 AM
Personally I don't care if it is based off the Voodoo 3000... if it can produce graphics like MGS4 and has great games, it will be a fantastic purchase.

I think people are rather off better reading other posts. Like this one up here.
I like your thinking Mr. Hunt.

With graphics like MGS4 showed, I wouldnt give a damn about no pipes or amount of memory... -_-

harl, it sucks ass huh? Why do ppl insist on putting console gpus on the same table as pc gpus.....

|MaguS|
03-30-06, 11:08 AM
Harl, For HD Video the PS3 uses both the CELL CPU and the RSX GPU so its not only dependent on the video memory.

harl
03-30-06, 11:12 AM
Harl, For HD Video the PS3 uses both the CELL CPU and the RSX GPU so its not only dependent on the video memory.

I mean Games in 1080p with HDR.

|MaguS|
03-30-06, 11:22 AM
I mean Games in 1080p with HDR.

I don't think we would need to worry about the bandwidth considering many PC games NOW are heavily CPU limited. Consoles work in different ways then PCs aswell, they are programmed in a different fashion.

Look at it this way, the bandwidth between the GPU and the CPU is over 5x the speed of 16x PCI Express (3.7GB/s)

ArturNOW
03-30-06, 11:57 AM
Why should we worry anyway. Let's wait 'til E3 and first real-time demos. Even though their will show only fraction of what PS3 is capable of it'll be indication what we can expect from future games.

|MaguS|
03-30-06, 12:01 PM
Acouple realtime demos have been shown already... MGS4, LAIR and I-8.

ArturNOW
03-30-06, 12:16 PM
Acouple realtime demos have been shown already... MGS4, LAIR and I-8.
I'm not sure if MG4 was really real-time demo. I thought that first show was during GDC and all screenshots that I was able to see were low quality. Also opinions about Sony's conference are contradictory.

|MaguS|
03-30-06, 12:17 PM
MGS4 is 100% realtime, Kojima was there himself to change the camera angles, zoom in to show more detail and even change game effects as the demo rolled.

http://www.gamespot.com/ps3/adventure/metalgearsolid4/news.html?sid=6133382

We don't need to tell you that Guns of the Patriots looks utterly incredible--the screenshots certainly speak for themselves--and unlike what we can say about some other PS3 games shown back at the Electronic Entertainment Expo, we can say with confidence that enough aliasing and pixelated textures were evident in this trailer to indicate that it was running smoothly in real time, and further live demonstrations from Kojima on the show floor at TGS confirm this to be the cast.

Marvel_us
03-30-06, 12:18 PM
AFAIK MGS4 was real time. Kojima even changed the lighting and such during the presentation.

EDIT: Posted a couple secs slower than |Magus|

ArturNOW
03-30-06, 12:45 PM
MGS4 is 100% realtime, Kojima was there himself to change the camera angles, zoom in to show more detail and even change game effects as the demo rolled.

http://www.gamespot.com/ps3/adventure/metalgearsolid4/news.html?sid=6133382
On E3 they changed angles, zoom and so on during Unreal Engine 3 show... but as you can probably know their was no working PS3 what Sony admited.

|MaguS|
03-30-06, 12:47 PM
On E3 they changed angles, zoom and so on during Unreal Engine 3 show... but as you can probably know their was no working PS3 what Sony admited.

Yeah, no PS3 but there was a DevKit that they ran it on. They did the same thing at this years GDC with UT2007 being played (not just a running demo).

Marvel_us
03-30-06, 12:49 PM
MGS4 was shown at TGS wasn't it?

|MaguS|
03-30-06, 12:50 PM
Yup, Search it here. Believe there was a link to the realtime presentation.

EDIT: Here it is...
http://files.filefront.com/MGS4_PS3_Devkit_Demo_Eng_subs/;4440530;;/fileinfo.html

ArturNOW
03-30-06, 12:53 PM
MGS4 was shown at TGS wasn't it?
Yes... but what I'm saying is I won't believe in Sony's crap 'til I see working PS3 :D It's always better not to hope for to much 'cause I don't like being disappointed.