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Old May 27 2013, 12:22 PM   #211
Rincewiend
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Re: Offiical XBox (3) Launch Thread

True, CD/DVD's are cheaper to mass pruduce than cartridges but they got the same pricetag...
And PS3 games pretty much cost the same now as PS1 games cost back then...

Nice article here:

http://www.eurogamer.net/articles/di...lysis-xbox-one

Very early on it was established that ESRAM is indeed incorporated into the Xbox One design - essentially a large, very fast cache of embedded memory attached to the GPU and CPU that helps to make up the bandwidth deficit inherent in using slower memory. So even without direct confirmation, we now knew that the 8GB of memory in Xbox One is indeed DDR3 as opposed to the bandwidth-rich GDDR5 found in the PlayStation 4 (and Wired's internal photography of the One confirms 2133MHz DDR3 Micron modules). Xbox One may well have a latency advantage over PS4 and power consumption will probably be lower, but GPU bandwidth - a key element in graphics performance - is indeed more limited on the Microsoft hardware.
In terms of the GPU hardware, hard information was difficult to come by, but one of the engineers did let slip with a significant stat - 768 operations per clock. We know that both Xbox One and PlayStation 4 are based on Radeon GCN architecture and we also know that each compute unit is capable of 64 operations per clock. So, again through a process of extrapolation from the drip-feed of hard facts, the make-up of the One's GPU is confirmed - 12 compute units each capable of 64 ops/clock gives us the 768 total revealed by Microsoft and thus, by extension, the 1.2 teraflop graphics core. So that's another tick on the Durango leaked spec that has been transposed across to the final Xbox One architecture and the proof we need that PlayStation 4's 18 CU graphics core has 50 per cent more raw power than the GPU in the new Microsoft console. Now, bearing in mind that we fully expect PlayStation 4 and Xbox One to launch at similar price-points, how did this disparity come about?

The answer to that comes down to a specific gamble Sony made that Microsoft could not - the utilisation of a unified pool of GDDR5 memory. In the early days of PS4 development, only 2GB of this type of memory looked viable for a consumer-level device. As higher density modules became available, this was duly upgraded to 4GB. By the time of the reveal back in February, Sony had confidence that it could secure volume of 512MB modules and surprised everyone (even developers) by announcing that PS4 would ship with 8GB of unified GDDR5 RAM. The design of its surrounding architecture would not need to change throughout this process - one set of 16 GDDR5 chips would simply be swapped out for another.
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