A user on Neogaf wachie recently started a thread with his analysis on why the Xbox One S could be using Polaris 11 GPU technology and it makes for an interesting read. Of course, full credit goes to wachie for putting this together.
Note: If there is indeed any form of GPU upgrade we imagine it’s limited to being used for HDR and nothing more.
It’s a well-established fact that the Xbox One (Durango SoC) was based on the Bonaire GPU. With the upcoming Xbox One S (Edmonton SoC), Microsoft is using the Polaris 11 GPU aka Baffin. Everything fits if you look at the full leaked specs from VC today.
R7 260X – 14
RX 460 – 14
R7 260X – 16
RX 460 – 16
R7 260X – 56
RX 460 – 48
R7 260X – 128b
RX 460 – 128b
R7 260X – 1.2
RX 460 – 1.4 (HDR)
R7 260X – 1.97 TFlops
RX 460 – 2.2 TFlops (because its clocked higher)
R7 260X – 115W
RX 460 – less than 75W
R7 260X – October 2013 (Xbox One – November 2013)
RX 460 – July 2016 (Xbox One S – August 2016)
R7 260X – 139USD
RX 460 – 99-109USD (expected)
Xbox One real-world power usage at 120W, not a huge jump from 260X accounting for lower clocks of the Durango GPU and rest of the Jaguar cores + subsystem. If the same translates for Xbox One S, we could be looking at ~80W or around 40% less consumption than the OG PS4.
The above is based on the assumption that the Baffin GPU is indeed 14 CU and not 16. If Baffin is 16CU, it doesnt make sense for AMD to not launch the full GPU with the 460. The texture unit partitioning is also weird, may be the Xbox One GPU will be clocked slightly (negligible) higher?