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IGN 是全球规模最大的游戏网站
http://ps3.ign.com/articles/712/712822p1.html
重点如下:(转贴自巴哈)
PS3 Cell 的PPE 与Xbox360 CPU 三核心PPE的其中之一核大致相同
X360 GPU有更多的通用计算能力(不是在讲峰值效能),对於运算资源可以有效分配运用
(XCPU是通用三核心CPU,Cell 重点运算能力的来源SPE则否)
由於PS3 主记忆体与绘图记忆体各为256MB,不会有使用超过256MB 绘图记忆体的游戏
(Xbox360 是系统与绘图部件共享512MB)
注:这部份的意见与过往一些开发者耳语、系统分析看法大致相符.
不过有消息推测PS3 PPE由於非性能重点,相较於XCPU而言算是弱化的PPE.
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PS3 Cell因为考虑良率表现,8个SPE之中仅有7个可使用(这部份已由Sony 确认)
作业系统另行会占用一个SPE,即PS3游戏可用的资源为6 SPE.
PPE的资源则将大多挹注於系统运算任务对於其馀六个SPE的分配与切割
这部份在今年GDC Demo中可发现很容易就运算满载.
反倒是PS3 性能中心的SPE群要有效运作并不容易
因为这面临计算机科学历史上长久以来的难题:平行计算.
-"I don't think the Cell is as well designed for game development as Sony would have you believe," Lee told the site. According to Lee the design of the PS3's Cell is more suited for "serialized streaming math code" which is common in video codecs and audio processing. This makes sense considering Sony's push for the inclusion of the next-gen Blu-Ray format in its console."
"我不认为Cell是为游戏开发而设计，事实上Cell的设计更适合用在串流编码和影像处理" 。这很可能是为何索尼将Cell跟下ㄧ代蓝光光碟格式包含在PS3里的原因。"
-"The PPE [Power Processing Element] appears to be essentially identical to one of the Xbox 360 cores,"
-the X360 has more "general purpose processing power" that is more easily reallocated, because the X360's CPU cores have equal access to all of the console's memory.
-"you'll never see a PS3 title with more than 256 MB of textures at any given time, due to the split graphics and system memory banks."
-(On Wii)"I think Nintendo has a pretty awesome system on their hands [ ... ] it looks like a well thought-out input system. The motion sensing features are solid and uncompromising, and they've left room for future expansion through the port on the main controller."
-The PS3's Power Processing Element is not intended to perform all primary processing for the system, but rather to act as a controller for eight SPEs, or Synergistic Processing Elements. One SPE is reserved for the system OS. Another SPE serves as a backup in case one of the remaining SPEs is defective.. |
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发表于 2006-6-16 14:48 · 加拿大
