Also this, if it adds anything.
"In addition, the information has been written in the official specification was published, the bandwidth of GDDR5 memory bus that is 176GB / s, you can also guess memory performance. So 256bit, memory interface of the Radeon HD 7800 Series "per" would be 256bit graphics memory is also given in the APU interface of PS4 probably, if it was temporarily 128bit, is too high data rate per 1bit. If the 256bit that point, you will be asked "176GB / s ÷ (256 ÷ 8) = 5.5Gbps" called plausible values, with the 256bit interface data rate of 5.5Gbps (5.5GHz clock operation) would be correct .
So 4.8Gbps, the data rate of graphics memory and the Radeon HD 7870 GHz Edition Radeon HD 7850 has the impression that this point is a little luck the way the PS4."
Before the PS3 everyone was nice to me :(
