Takie tam forumowe gadki-szmatki:
-czyli dlaczego ostatnio niektórzy deweloperzy stękali coś na temat mniejszej ilości pamięci w PS3 [ w sensie dostępnej dla programisty , bo fizycznie jest to 512 w PS3 i 512 + 10 w X360]
"the OS for the ps3 actually takes up a little bit more then 96MB of memory, i cant go into specifics because of restrictions but trust me its a bit higher.
also on the 360 the 32MB quote is including the sound from games, not just the OS. the OS for the 360 only takes a little less then 16MB of memory.
here is the OS breakdown for the two systems to put it all together:
PS3:
-1 SPE used for OS 24/7
-1 SPE on stand-by, can be taken over by OS at any moment (game code will NOT run to this SPE)
-96+ MB of memory used by OS
-leaves 1 thread on PPE and 5 SPEs for game development code and execution.
360:
-.5%-2% of the second thread on cores 1 and 2 reserved for OS (cores are labeled core0, core1, and core2 in game development.)
-16MB of memory reserved for OS
to clarify, the OS in these systems includes the dash, guide, menues, OS kernal, and such.
so in total we have a little less then 416MB of memory in the ps3 and in the 360 around 496MB of memory; yes this DOES make a difference. Both systems are capable of handling 6 hardware threads at a time, this does not mean that it can not handle more then 6 software threads though.
as for the question of accessing the XDR memory for RSX, it can be done but its so bottlenecked and not efficient enough to be used in real world programming."
http://www.gamersreports.com/forum/index.php?showtopic=7975