Understanding why Xbox One doesn't need GDDR5 RAM

[Eddie_Raja]

ethomaz said:

What did you are talking?

You can't sum bandwidth dude... and 176GB/s is for GPU and CPU in PS4... they use the same memory controller... they share the bandwidth and memory... CPU didn't use 10GB/s bandwidth... 90% of the PS4 bandwidth is for GPU.

The bus for gamepads, EyeToy, peripherals is other in PS4 too... in every other consoles or PC... we are talking about Memory bus and not peripherical/gamepad/kinect bus lol... theses guys didn't access the memory... they do requests to CPU via NorthBridge... they don't have direct access to memory or the memory controller.

And you are not reading the VGLeaks diagram in the wrong way... the PS4 diagram is similar to that too.

And stop with bullshit 102GB/s... only 32MB of eSRAM can be access in 102GB/s... the main bus is 68GB/s shared for all.

Exactly.  The ESRAM may allow them to run a low level AA on it without touching the DDR3, but that is it.  It would take at least 128MB of ESRAM to make a decent difference in my opinion..