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原帖由 shu0202 于 2006-12-5 13:04 发表
AMD日前签署第二代Z-RAM技术,它的全称是zero capacitor RAM,它是一种基于silicon-on-insulator的无电容嵌入存储技术,通过它可以达到非常高密度的处理器cache。
资料显示第二代Z-RAM技术预计可以实现每 ...
哎,又来了,不要指望用一个什么所谓的火星技术就可以翻身的。
这个所谓的Z-RAM什么水准,到现在也没有具体的参数,下面来自于他的关于第二代Z-RAM的宣传资料:
http://www.innovativesilicon.com/en/pdf/gen2_rollout.pdf
“Z-RAM Gen2 also exhibits enormous flexibility,” added Jeff Lewis, vice president of marketing. “The technology can be ‘tuned’ for a very wide range of speed/power operating points, from ultra-low power to very high performance.” Z-RAM Gen2 achieves compelling specifications in a 65nm fabrication process:
• Ultra-high density: greater than 5Mbits per mm2 at 65nm, and greater than 10Mbits per mm2 at 45nm (1.4x – 2x denser than eDRAM and 5x-6x denser than SRAM)
• High performance random array access: greater than 400MHz (when optimized for performance)
• Very low active power consumption: under 10μW/MHz (when optimized for low-power)
他就是不敢说10Mbits/mm2的密度的时候,速度是多少。也不敢说在达到400MHz的存取速度时,密度是多少,更不要说400Mhz的存取速度拿来做片外三级缓存都勉强。
很明显,如果要达到400MHz的读取速度,密度就远没有10M bits/mm2。相比45nm下密度2M bits/mm2,存取速度4GHz的SRAM,看不出什么优势。 |
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