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Technology Stocks : Advanced Micro Devices - Moderated (AMD)

AMD 219.83

+1.1%

Dec 1 3:59 PM EST

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To: Tenchusatsu who wrote (60491)	10/26/2001 2:20:33 PM
From: dale_laroy	Read Replies (1) of 275872

>Dale, then what is the point of addressing 64 bits in the OS if it is already able to address 36 bits? The highest-end AMD platform can't even support more than 4 GB of DRAM, and it will take them quite a while before they even hit the 36-bit limit of 64 GB.< You are of course right for the specific example of applications that only address 32-bits. But, the ability of Hammer to do the same thing with applications that are designed to utilize up to 36-bits of address space could encourage the development of more 36-bit applications. As for x86 systems not having more than 4GB of physical memory, this is largely irrelevant. Hammer can utilize a 48-bit virtual address space in 4GB or less of physical address space. Especially when doing database queries using "in memory" files, it is unlikely that all the virtual addresses will ever have to be physically in memory.

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