Does anyone have any clue how much memory bandwidth 4xAA@1280x720 would account for? I cannot find any answers on google, i asked M_hael and all he could tell me was it accounts for huge amounts of bandwidth(i know it doesn't effect the 360 with EDRAM but im trying to figure something out)

What do you mean memory bandwidth? As far as I understand it the graphics chip gets anti-aliasing for "free", and even so the processing happens inside the chip, the bandwidth needed would just be the byte size of the frame.

On the 360 its free, on all other system the bandwitdth tax is massive(the main reason why pc video cards utilize well over twice the bandwidth in the PS3 or xbox 360)

Try this link;

http://download.MS.com/download/d/3...on_Xbox_360.ppt


I have a comparision between the R420 (ATI Radeon X800XT) and the 360's R500 somewhere.

I will track it down if it is really important.


cpi

since there is no r500 chip that ati put out im aumming its the r580 ? x1900 ? 48gb/sec memory bandwidth, though using anti aliasing wont affect that as much as it will the gpu core.