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zarx said: Sea Islands it's self is a slightly modified version of Southern Islands. Whatever custom chip that AMD have cooked up for Sony bassed on VLIW5 will likely incorperate some of the same improvements they were working on for Sea Islands. I would imagine anyway. If they go for unified GDDR5 there is no way they could go past 4GB, I mean 4GB GDDR5 is already 16 chips, unless they are really going for 3D stacking that is already pushing the limit. GDDR5 is half the density of DDR3 and costs more per chip if I'm not mistaken as well. |
16 chips? 256MB is the small chip of GDDR5... there is 512MB and 1GB too (I guess the 2GB too)... so 16 x 512MB is 8GB.
Anyway 16 x 32 bits = 512bits bus width... it's almost twice the rumored bandwidth for GDDR5... I think they are using 8x512MB for 4GB = 256bits bus width... 160-190GB/s depending of the final memory clock.
16 chips (~380 GB/s) I think is out of question... 8 chips is what Sony will use.
