Quote Originally Posted by saaya View Post
tdp? i find it hard to believe that the memories power consumption is an issue

its possible that since its 320bit, they dont need high clocks, more bw barely scales... so they go for the cheapest low clocked stuff... makes sense, thats kinda what they did with gt200, very wide interface and then use cheaper gddr3.
High speed GDDR5 consumes power like a mofo - it's the reason the 4870 had such a horrendous idle power consumption. And also the reason the 5970 only has 1000 Mhz GDDR.