Advanced Micro Devices - Moderated (AMD) Message Board

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Technology Stocks : Advanced Micro Devices - Moderated (AMD)

AMD 252.83

+0.3%

3:59 PM EST

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To: ptanner who wrote (103478)	10/22/2003 2:30:58 AM
From: Joe NYC	Read Replies (1) of 275872

PT, I don't want to be right about this nor to keep harping on it. But the memory benefits will be hard for anyone to realize if the near-term motherboards will never support this level. I think the motherboards (and their BIOSs) are basing this their assumptions on memory chips size of 512Mbit. Maybe because they have some engineering samples, I don't know, but we need 1 Gbit chip to break through the 4 GB barrier on the desktop. It would mean 4 ot 6 GB on Socket 754 CPUs and 8 GB on Socket 939 CPUs. Opterons should already be able to achieve 8 GB with 4 DIMM per channel registered, each DIMM containing 2 GB, and it is possible with 512Gbit memory chips on DIMMs. It will go to 16GB max per CPU with 1Gbit memory chips in registered DIMMs. As far as chipset stuff related to memory capacity... aren't a lot of devices allowed DMA which are connected to the chipset rather than directly to the CPU (and its memory controller)? I am not sure how that would impose any limit. The transfers to CPU are done over HT link. Joe

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