Wii U vs PS4 vs Xbox One FULL SPECS (January 24, 2014)

[zarx]

ethomaz said:

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.

Link? The largest GDDR5 chips I can find reference to are 2Gbit. http://www.elpida.com/en/products/gddr5.html, http://www.skhynix.com/products/graphics/graphics.jsp?info.ramCategory=&info.ramKind=26&info.eol=NOT&posMap=graphicsGDDR5, http://www.samsung.com/global/business/semiconductor/product/graphic-dram/catalogue

Are you sure you are not getting that mixed up with DDR3 which does go to 4Gbit?

The latest device with 4GB of GDDR5 would be the GTX680 which uses 16 memory chips

"Galaxy looks to be the first with a custom designed PCB in order to fit the massive sixteen memory chips required to get a full 4GB."

http://www.legitreviews.com/news/12716/

So unless you have a source that 4Gbit GDDR memory chips will be available in the next few months.