GT 5 Prologue this fall, Gran Turismo 5 spring 2008

Someone with an eagle eye caught this:

GTHD_using_3SPEs.jpg



It's from around 0:29 of this video.
http://www.gametrailers.com/player.php?id=18931&type=wmv&pl=game

It shows 4 bars at the top of the screen. The finder seems to think it shows GTHD is currently using 3 SPEs, but it may be 2 PPE threads + 2 SPEs.
 
one said:
Someone with an eagle eye caught this:

It shows 4 bars at the top of the screen. The finder seems to think it shows GTHD is currently using 3 SPEs, but it may be 2 PPE threads + 2 SPEs.
Click to expand...

they're going to need the rest of the SPEs to deliver more than one car (8-12?) on screen all with AI and physics.

good find!
 
Tap In said:
they're going to need the rest of the SPEs to deliver more than one car (8-12?) on screen all with AI and physics.

good find!
Click to expand...


Who says that little demo even uses up those 2 SPEs? Just because they are used doesn't mean they are utilized 100%. I see nothing that could not be done on the PPU alone in that demo.
 
Jesus2006 said:
Who says that little demo even uses up those 2 SPEs? Just because they are used doesn't mean they are utilized 100%. I see nothing that could not be done on the PPU alone in that demo.
Click to expand...

Thats a bold statement (unless you are creating the game), considering there is more than what you can see (leaving graphics aside). You see there is calculations being done for the physics, animations, and how the parts/tires affect the car and these calculations may be offloaded to the SPUs. ;)
 
Tap In said:
they're going to need the rest of the SPEs to deliver more than one car (8-12?) on screen all with AI and physics.

good find!
Click to expand...

Thats what I think to, so far you only see one car. So the AI, collision detection, graphics, geometry, effects (perhaps they add skid marks?) and more for the other cars.
 
Nebula said:
Thats a bold statement (unless you are creating the game), considering there is more than what you can see (leaving graphics aside). You see there is calculations being done for the physics, animations, and how the parts/tires affect the car and these calculations may be offloaded to the SPUs. ;)
Click to expand...

I dont think GTHD, used any really heavy physics algorythms, mostly felt like GT4
 
Nebula said:
Thats a bold statement (unless you are creating the game), considering there is more than what you can see (leaving graphics aside). You see there is calculations being done for the physics, animations, and how the parts/tires affect the car and these calculations may be offloaded to the SPUs. ;)
Click to expand...
I thought it was common knowledge that the 360 can process physics for a maximum of 17 cars and display them all on screen at once and the PS3 can process physics for a maximum of 39 cars but display only 23 on screen at once. That based of course on detailed analysis of the FLOPS of each system.
 
Bigus Dickus said:
I thought it was common knowledge that the 360 can process physics for a maximum of 17 cars and display them all on screen at once and the PS3 can process physics for a maximum of 39 cars but display only 23 on screen at once. That based of course on detailed analysis of the FLOPS of each system.
Click to expand...

Well I responded to the post below. :smile:
Jesus2006 said:
Who says that little demo even uses up those 2 SPEs? Just because they are used doesn't mean they are utilized 100%. I see nothing that could not be done on the PPU alone in that demo.
Click to expand...
 
Bigus Dickus said:
I thought it was common knowledge that the 360 can process physics for a maximum of 17 cars and display them all on screen at once and the PS3 can process physics for a maximum of 39 cars but display only 23 on screen at once. That based of course on detailed analysis of the FLOPS of each system.
Click to expand...

I hope you're joking...
 
Nesh said:
Will someone explain me what exactly that is?:devilish:
Click to expand...
In the PS3 Edge demo, there was a graph that showed CPU usage on each of the cores/threads which was colour coded to different tasks. Each line represented one PPU thread or SPE. The GT5 pic shows a similar looking graph, though it's unclear from the low quality if it's exactly the same thing. Assuming it is, and counting the lines, only four threads are in operation - 2 PPU threads and 2 SPEs. I dunno that this is surprising; it'd be crazy to think this demo was using a large amount of Cell!
 
Shifty Geezer said:
In the PS3 Edge demo, there was a graph that showed CPU usage on each of the cores/threads which was colour coded to different tasks. Each line represented one PPU thread or SPE. The GT5 pic shows a similar looking graph, though it's unclear from the low quality if it's exactly the same thing. Assuming it is, and counting the lines, only four threads are in operation - 2 PPU threads and 2 SPEs. I dunno that this is surprising; it'd be crazy to think this demo was using a large amount of Cell!
Click to expand...

Oh, ok thanks for the info :)

Atlast someone who put the time and effort to explain to me!!
 
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