Q. Has ANSYS done any bench marks between amd 64 bit with ddr 400 ram vs intel 64 with ddr2 ram ? I am not too sure of the current mainboard situation and if it is even mainboard related, but will intel machine perform faster based on the ram alone, if all other factors are as equal?
A. The memory speed is an important factor in comparisons between 2 systems, whether AMD vs. Intel or Intel vs. Intel, but bus speed and processor speed are also important. Often a given processor gets put on a cheaper, slower board with slower memory. This happens often with the lowest cost systems. Then the processor is a lot slower than expected. If an Intel em64t system has equal memory size to an AMD system the em64t system will win (The fastest em64ts - 3.6 - 3.8 Ghz). This is especially true for sparse solver performance in ANSYS. In the pcg solver memory speed is more important so the 2 processors are more equal in that case.
Both AMD and Intel make fast processors. Both have their strengths and weaknesses. In either case the recommendation is to purchase a 64 bit machine with at least 8 Gbytes of memory, 2 processors and the fastest bus speed. 800 Mhz for Intel is about equal to 1.6 Ghz speed on AMD because they mean slightly different things. But a motherboard that runs at 500 Mhz is not going to run ANSYS nearly as fast as the 800 Mhz boards (and soon to be 1600 Mhz Intel motherboards). It is worth investing in memory on any system. It is THE performance differentiator. Given that both AMD and Intel have equivalent configurations, it comes down to price.
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Q. Has ANSYS done any bench marks between amd 64 bit with ddr 400 ram vs intel 64 with ddr2 ram ? I am not too sure of the current mainboard situation and if it is even mainboard related, but will intel machine perform faster based on the ram alone, if all other factors are as equal? A. The memory speed is an important factor in comparisons between 2 systems, whether AMD vs. Intel or Intel vs. Intel, but bus speed and processor speed are also important. Often a given processor gets put on a cheaper, slower board with slower memory. This happens often with the lowest cost systems. Then the processor is a lot slower than expected. If an Intel em64t system has equal memory size to an AMD system the em64t system will win (The fastest em64ts - 3.6 - 3.8 Ghz). This is especially true for sparse solver performance in ANSYS. In the pcg solver memory speed is more important so the 2 processors are more equal in that case. Both AMD and Intel make fast processors. Both have their strengths and weaknesses. In either case the recommendation is to purchase a 64 bit machine with at least 8 Gbytes of memory, 2 processors and the fastest bus speed. 800 Mhz for Intel is about equal to 1.6 Ghz speed on AMD because they mean slightly different things. But a motherboard that runs at 500 Mhz is not going to run ANSYS nearly as fast as the 800 Mhz boards (and soon to be 1600 Mhz Intel motherboards). It is worth investing in memory on any system. It is THE performance differentiator. Given that both AMD and Intel have equivalent configurations, it comes down to price. |
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