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Technology Stocks : Advanced Micro Devices - Moderated (AMD)
AMD 236.73-6.1%Jan 30 9:30 AM EST
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To: wanna_bmw who wrote (85479)7/22/2002 11:06:37 AM
From: Joe NYCRead Replies (3) of 275872
 
wbmw,

But an AMD 64-bit computer can only address 1TB of memory (40-bits).

CPU internally can access 2^64 bytes of memory. How many address lines, of those 64 bits AMD choses to connect has to do only with real world. Fi AMD imposed limit is indeed 40 bits, it means that the CPUs that go on sale early 2003 will within their lifetime be able to use DIMMs only up to 128 GB, 8 of them. If the current technology is at 512Mb x 32 = 4 GB.

So the current densities can go up 32x from where we are today before the current implementation of Hammer runs out of its addressing space, which, with 3 years of its lifetime will not happen.

Also, this limit is per CPU not per computer, so it may be entirely possible to have a dual CPU computer with 2 TB capacity, 8 way with 8 TB, etc.

Joe
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