DigitalFoundryltä on tullut mielenkiintoista analyysiä X1:n tehoista ja muusta. Lisäksi tehovertailua PS4:een, minkä nyt luulisi kiinnostava ihmisiä:
But the only new information we had that hadn't previously leaked was the inclusion of a 500GB hard drive and a five billion transistor count for the main processor. Gaming specs like the CPU clock-speed, the type of RAM, the make-up of the graphics core - all the most controversial elements of the leaked information, in other words - were ignored.
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A follow-up architecture panel hosted by Microsoft's Larry Hyrb soon put paid to the latter, more optimistic appraisal of the situation. Very early on it was established that ESRAM is indeed incorporated into the Xbox One design.
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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.
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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.
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PlayStation 4's 18 CU graphics core has 50 per cent more raw power than the GPU in the new Microsoft console.
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With multimedia such a core focus for its hardware, it set out to support 8GB of RAM from day one (at the time giving it a huge advantage over the early PS4 target RAM spec) and with serious volume of next-gen DDR4 unattainable in the time window, it zeroed in on supporting DDR3 and doing whatever was necessary to make that work on a console. The result is a complex architecture - 32MB of ESRAM is added to the processor die...
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Bottom line: if you're wondering why Xbox One has a weaker GPU than PlayStation 4, it's because both platform holders have similar silicon budgets for the main processor - Sony has used the die-space for additional compute units and ROPs (32 vs. 16 in One), while Microsoft has budgeted for ESRAM and data move engines instead. From the Xbox perspective, it's just unfortunate for Microsoft that Sony's gamble paid off - right up until the wire, it was confident of shipping with twice the amount of RAM as PlayStation 4.
Eli PS4:n grafiikkaprosessori on 50% tehokkaampi kuin X1:ssä. Lisäksi rakenne PS4:n on ilmeisesti yksinkertaisempi, koska X1 kikkailee tuolla ESRAM:lla. Tämä yhdistettynä siihen, että Sonyn dev kitit on kuulemma paremmat, ei tarvitse ihmetellä kun (indie) devaajat sanovat että PS4:lle on helpompi kehittää pelejä.
Ja vähän tuosta multimediasysteemin toiminnasta:
Firstly, Microsoft needs to be able to make this work with any and all set-top boxes in the world. Its solution appears to be the time-honoured IR blaster - a little cable plugs into the rear of the One, its emitter pointing towards the infra-red input on the set-top box. The console essentially emulates the functions of the existing remote control, relying on precise positioning to beam the signal into the IR receptor on the box. Historically it is fraught with inaccuracy, and we do wonder how Microsoft aims to address this. Secondly, the One itself has no DVR functionality, meaning that it is layering its own user interface over the existing one - not exactly a useful set-up.
More than that, the system appears to have been designed with a very specific US focus, where cable TV boxes are the norm. What about TVs with built-in decoders, either terrestrial and satellite in nature? Not everyone wants subscription TV, so not everyone has a set-top box - but they're still enjoying a large range of digital channels and a decent amount of HD programming. Perhaps more pertinently, Microsoft appears to have invested a massive amount in accommodating live TV when the overall trend is moving towards time-shifted viewing and streaming media - something it almost completely ignored in its presentation. It's a very curious decision and a massive gamble. It's clear that the firm seeks to bring gaming and other media more closely together than they ever have been but we suspect that the success of this endeavour will come down to the usefulness and desirability of the companion content that was being demonstrated. Other than that, Microsoft seemed to be suggesting that changing inputs was a massive problem for people - something we find rather hard to grasp.
Paljon lisää:
http://www.eurogamer.net/articles/digitalfoundry-spec-analysis-xbox-one