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Topic Title: DDR2
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Created On: 01/19/2005 05:56 PM
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 01/19/2005 05:56 PM
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Anyone know if the upcoming dualcores will be socket 939? Will they be compatible with DDR2? I'd truly hate to keep using my P4.
 01/20/2005 10:37 AM
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QUOTE Anyone know if the upcoming dualcores will be socket 939?
Dual-core processors will be released for Socket 940 (Opteron series) and Socket 939 (Athlon 64 FX series).
QUOTE Will they be compatible with DDR2?

Most likely, you won't see DDR2-support on an AMD-platform before 2006 when it'll actually make sense to endorse DDR2...also, DDR2 would probably require a new Socket.


Right now, DDR-2 memory is NOT faster than high-end DDR-I memory, because it currently suffers from very high latencies which significantly reduces its efficiency.
Furthermore, a 'stick' of DDR-2 memory costs considerably more than a DDR-I 'stick' with the same capacity and equal or better performance.

At this point, DDR-2 memory provides neither enough raw bandwidth nor bandwidth-efficiency, let alone an acceptable price-performance ratio to justify a move from DDR-I to DDR-2 with AMD processors.
Therefore, it doesn't really make sense to redesign the Athlon 64's on-die memory-controller to accomodate for DDR-2 memory at the moment.

Future AMD processors and platforms will support DDR-2 memory, but only if it makes sense...which will probably be the case around 2006.

In my opinion, not supporting DDR-2 at the moment is a good decision as it saves us users a lot of money (for buying expensive DDR-2 memory and new motherboards) and AMD platforms will still outperform the competitions' DDR-2 platforms by a comfortable margin for the simple reason that the integrated memory-controller's low-latency and the absence of a 'Frontside Bus' on the Athlon 64 results in much better throughput and efficiency.

The opinions expressed above do not represent those of Advanced Micro Devices or any of their affiliates.

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