walsufnir on 05 June 2013
| Otakumegane said: Can someone explain eSRAM and why it's so important all of a sudden? |
First, it's not important all of a sudden - it is usual stuff in consoles, even ps2 had it :)
What is it for? Well, the "path" from and to cpu is "long" and slow - that's why we have caches in processors so that often needed data are "nearer" and faster accessable to the cpu. We now also have 2nd-level-cache, sometimes 3rd-level-cache, and then ram. You can think of another cache-like memory between the cpu and ram - esram is an especially high bandwidth, low-latency memory-solution.
Look at this picture:
From high to low memory is increased but therefore speed is also decreased - think of esram between ram and the caches.
