Xbox and PS3 dont have any DDR3 based memory.
Probably said already GDDR3=DDR2 slightly tweaked. XDR=Competitor to DDR2/ XDR2 = competitor to DDR3.
Besides GDDR4 is NOT BASED ON DDR3 but on DDR2.
DDR2=GDDR3/GDDR4
DDR3=GDDR5
Also XDR is inferior to DDR3.
Both Consoles are on DDR2 level. GDDR3 is nothing else then an enhanced DDR2 module. XDR is not better then GDDR3 basically there is no Ram Speed advantage between PS3 and 360. As xdr is faster but offers less bandwith practically giving away its advantage. In Raw Numbers both Consoles are GDDR3 Level=Enhanced DDR2.







