| Zappykins said: As far as arrangements go there are four 256b wide banks for a total of 1024b or 128B wide memory. A little math gets you to a speed of 1.59375GHz, lets call it 1.6GHz because the peak bandwidth is unlikely to be 204.00000GBps. Why is this important? What was that GPU frequency again? 800MHz you say? Think that is half of the memory speed for no real reason? If you said yes you are wrong. With the rumored bump of GPU speeds from 800MHz to 831MHz, this may also bump the internal memory bandwidth up by a non-trivial amount. In any case now you know the clocks. |
Unless Microsoft says otherwise, I'll assume that the eSRAM's clock will be untied from the CPU and GPU and runs at a multiple of the base clock.
| Zappykins said: There is obviously the Radeon GPU, something that sources say is somewhere between an HD6000 and HD7000 in capabilities and a fraction behind what Sony has in the PS4. These very minor version differences should be more than made up for by the differences in uncores and system implementation though, don’t read too much in to such minor generational differences. Think of this as more nuance than substantial. |
The sources are wrong, the Xbox One uses a GCN based GPU not one based on the prior VLIW 4/5 GPU's, there are stark differences between the GPU generations in all areas.
| Zappykins said: The rest of the units are not well-defined by the presentation but you can get an idea that the video decode and encode engines are substantially beefed up from what AMD puts in their current GPUs. There is no word on whether it is a Microsoft design or the AMD version but the capabilities of always-on recording, encode, and decode presumably without interrupting any DVR functionality points to quite substantial throughput, far more than a PC needs. |
Obvious reasons why this could be true, on the PC you can fall back to software, CPU's have plenty of horsepower and some codecs/video playback software will actually use the GPU's shaders rather than AMD's UVD hardware block.
But to say it's "far more than a PC needs" is almost funny, you can do all that, plus more on a modern Radeon GPU, consoles have to be more resource conscious however when it comes to such things, so it makes sense.
Often I might have a TV streaming in and recording then transcoding to other devices in my home whilst running a video game on top of it, all on the GPU, without slowdown, heck, sometimes I might do twice that at the same time with a couple of TV streams.
HTPC's have been doing it for years.
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