Author: Nigel Edwards
Date: 09:29:14 02/22/05
I am building a dual opteron 248 based on the new Tyan S2895 motherboard and will use it mostly for playing and analysing with Deep Shredder 9. I am looking to purchase 2gb ram but am unclear on the most suitable type of ram and how it should be configured. Any advice would be most welcome. The motherboard is expected to be stable with either DDR3200 CL=3 or DDR2700 CL=2.5 registered ram. More aggressive latency is discouraged because the motherboard provides only 2.5v to the memory sockets, and lower latency ram requires 2.6v or above, although there is some tolerance. The ram can be operated at 128 bits with or without NUMA, or at 64bits. I think I have the following choices: 1. 2 x 1gb DDR2700 CL2.5 configured at 64 bits. 2. 2 x 1gb DDR3200 CL3 configured at 64 bits. 3. 4 x 512mb DDR2700 CL2.5 at 128 bits with or without NUMA. 4. 4 x 512mb DDR3200 CL3 at 128 bits with or without NUMA. My gut feeling is that option 1 should be best. After interrogating the archives my understanding is that in general low latency is more important than bandwidth and 64 bit operation is preferable to 128 bit. However I have also read that Shredder may use memory in a different way to other chess engines and perhaps I should not ignore bandwidth and NUMA considerations. I am an amateur in this field and apologise now for any howlers in the above. I would very much appreciate help in this decision as the outlay is c. £400 and I would like to get it right first time!
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