Originally Posted by Yeroon
Why gddr5? DDR4 brings a large bump in bandwidth as well as being lower power and better latency. No point in dragging the already lower cpu performance even lower.
You got a link or something showing the Temesh/Kabini SoC's are bandwidth limited, considering 128 gcn cores get a 64bit mem interface while a 7750 has 512 gcn blocks with a 128bit mem interface? It ends up working out to the same data rate per core/mem clock if the 7750 gets gddr5 (QDR). So I doubt a large increase in bandwidth is going to change much unless the core clocks go up or the count goes up.
Yes I know that from a ram manufacturer isn't that legit but the numbers are
Temash not so much as it is all BGA already but non tablet Kabini does DDR4 is great for processor logic but as we are focusing on faster graphics rather than more cpu performance gddr5 is a better choice.
If you need really low power there is DDR4L but if you want gpu perf faster less precise low latency ram like gddr5 is a better choice.
Now DDR4 isn't really that in use yet the high end platform I'm getting will be DDR4 ready but because HP and other big server names haven't stepped up yet it wont be until the haswell refresh late 2014/early 2015 before it gets here.