个人认为可信度很低的一则传言：CPU和GPU分离设计，GPU浮点性能达到2.3T，8GB DDR3 + 6GB GDDR5

http://vgrumors.com/xbox-2049594113.html

Xbox dev kit specs 05/2013
May 4, 2013 - Durango - Rumor
Source Says: I think at some time in the second half of 2012 Microsoft must have realized that their vision of a console powered by an APU with 1.23 TFLOPS graphics processing power will have a hard time competing with the PS4. It also became seemingly clear at that time, that Sony could quite easily upgrade the RAM in their new console, due to new chips being available with higher capacities. Although I guess they didn't *know* that Sony would really go with 8 GB at that time, they knew it was a possibility. The problem was, they were running out of time. Their old design was not very flexible, so they had to come up with something new.

So they completely scrapped the APU approach, and basically rebuilt the whole architecture from scratch with even more off-the-shelf parts. The current kits we have received a while ago have a discrete CPU and a discrete GPU. The CPU is still x86, has 8 cores and has still relatively low clocks, but it's not Jaguar as far as I am aware. I guess they did choose a CPU with a slightly bigger die now, because size isn't as important anymore as it was on the APU, but I don't know exactly because the cases are sealed and I can't take a look inside. The GPU is also new, and it is not GCN1, at least that's what I heard from our programmers. More about the GPU further down. There was also a big change regarding memory architecture: It is no longer a unified memory solution. There are now two memory pools: One with 8 GB DDR3 RAM (34 GB/s, 4 GB available for games), and one with 6 GB GDDR5 RAM (192 GB/s, all available for games). eSRAM is GONE! Technically the devkit has 16 GB DDR3 RAM, but the Xbox will ship with 8GB DDR3 (and 6GB GDDR5). The downside of going with a discrete CPU/GPU is loosing some of the APU synergy effects, but I guess it's not too bad and it was the only way to update the specs, because designing a new custom chip was certainly not possible in that time frame.

There is currently some confusion about clock speeds and processing power, I cannot give you exact numbers, because they are... a little bit odd right now, and as I wrote above I suspect it's a way of tracking leaks. When we received the kits, we where a bit surprised because they had the same cases as the old ones, which seems strange because a discrete CPU/GPU with split RAM obviously needs a little bit more space / cooling. And they where loud. Really loud. Shortly after we received the kits we got an update which reduced clock values slightly, because some devs have reported problems with heat. As it stands now, the GPU has ~2.3 TFLOPS (it was ~2.7 when we received the kits - again, sorry for not giving you the *exact* number). I have no idea if this is the final number or if they will work on a better cooling solution or something like that. It probably could even go further down, I don't know, so don't be too excited - our games are currently built with lower specs in mind. A personal theory of mine is that they postponed the reveal to work on an updated case, which is better suited for the updated specs.
Source: pastebin.com

[ 本帖最后由 KoeiSangokushi 于 2013-5-7 08:15 编辑 ]

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原帖由 @chenmingod2008  于 2013-5-7 08:24 发表
6G GDDR5目前A系只有7970的384bit才用得上吧，结合以前阿杜君的384bit接口爆料，有可能吗？

这个网站什么传言都收录的，连上次BD愚人节说720是双APU的传闻都有收录

所以我感觉这则传闻的可信度也应该很低

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原帖由 @chenmingod2008  于 2013-5-7 08:50 发表
我觉得从成本的角度来说微软也不会傻堆配置了，这条消息有点扯了

VGLEAKS关于720的料目前来看依然是最可信的

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原帖由 @nvidia  于 2013-5-7 09:52 发表
这个应该是微软FANS YY的吧，针对性太强了

微软FANS没YY这样的内容吧，太假了

本帖最后由 KoeiSangokushi 于 2013-5-7 09:56 通过手机版编辑

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原帖由 掳卡古米 于 2013-5-7 10:08 发表

机能比PS4差多少.

我只能说VGLEAKS泄漏的架构肯定是靠谱的
问题是具体的数值，比如说，微软真的有必要做到砍掉三分之一的CU数量（18 VS 12）吗？

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原帖由 @正义的化身  于 2013-5-7 10:47 发表
有病啊！没两天就21号了，不能消停点！？~~

传言网站不靠发传言混靠什么混？

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原帖由 @GYNECOMASTiA  于 2013-5-7 11:52 发表
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原先的四两拔千斤顶不住了 ？

这个可信度虽然低，但比四两强了不少，还是改信这个吧

这就是为什么说四两拨千斤的原因
微软当然会选择最能取得家用机市场统治地位的方案，而不是性能最强的方案
一如XBOX360

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原帖由 @倍舒爽  于 2013-5-7 18:52 发表
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cu估计是有chenyu的，不排除以降低良率的方法来提高cu数

GPU部分的良率对于索软双方都一样的，所以最后结果还是要问微软为什么要砍掉三分之一的CU

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原帖由 @倍舒爽  于 2013-5-7 19:25 发表
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你理解错了，我不是这个意思

哦，我看错了

不过反过来推也是一样吧，索尼也可以这样做

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原帖由 @倍舒爽  于 2013-5-7 20:57 发表
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也有可能，反正这招就是俺想破脑袋不回炉却又能增加cu组数的方法了

前提是12组CU这个数字为真