PS3 devkit

i dont think they were using this at E3

 

same is the case with alpha kits on xbox 360. G5 with AGP 8x runs at 2 Gb/s between cpu gpu

 

So what do you think they were using at E3? Something worse?

 

in E3 everything was a tech demo except Unreal 2007 which was running on a high end pc with sli 6800 like gears of war while the real time UE3 demo is similiar to the alpha kit Ruby Demo

 

That bandwith is for only one bus in the system, the AGP / PCI-X goes between main RAM and video RAM/GPU. It can slow down texture and vertex uploads (makes streaming them problematic), but the actual video subsystem can work at the full speed of the GPU's own memory bus.
So, the change won't have such a big effect, although it should allow some interesting new effects and more textures per frame.

 

thats funny you said that ut2007 one was on a high end PC considering current games run with HDR like crap not to mention AA in there and soft shadowing all on 720p, i dont see 6800s doing that. He also mentioned it was running on Cell so I don't see how they can use cell on a pc mobo with 2 pci-e slots running sli

 

I actually seem to remember that he specifically said they didn't use Cell on the UT2007 demo, and that they would be able to do 'more amazing things once they start using it', or something along those lines.

 

They used the PPE, but none of the SPEs. I thought it was quite clear the UE3 demo was running off a PS3 dev kit though.

 

Close enough!

 

What about the memory on the unreleased gpu ? Remember the video card has its own set of memory. I would highly doubt they were fetching textures over the 2gb bus

 

Wow..it is pretty huge

 

Thats just a decoy console, the real console is the Giant Panda in the backround.....huh...where do you feed the CDs? You ever have a colonic...No?...then you don't want to know...

 

What's so shocking. U2K7, spiderman on a black background and assorted tech demos aren't so amazing. As far as the Killzone video, my PC can play back a CGI movie just as good as those PS3 dev kits.

 

Now I could be wrong here, but I remember reading in an interview (Mark Reins, I think) where they stated that the were using '2 Next Generation Video Cards in SLI' which I assume means that the UT2K7 demo was running of 2 7800's in SLI.

 

Can someone explain the hang up on the pci-e 4x bus ?

The dev kits have a cell and over that 4x pci-e bus are g70 cards with thier own pool of fast ram. Its most likely 256bit bus with 650+ mhz ram. This should be faster than the bandwidth the rsx will have acess too in the actual ps3 unit

 

Except you will never get the full xdr bandwidth to the rsx considering the cell chip has to acess it too .