Richard Gerber's NERSC Blog
January 16, 2015
JANUARY 16, 2015 by Richard Gerber
Edison is back, now with all 28,000 memory DIMs replaced and upclocked from 1600 MHz to 1866 MHz. (This is the memory speed, not the processor speed.) So, what will this mean to you? It's hard to predict exactly, but some codes will see a noticeable performance increase, which is good news for everyone. If you know that your code is memory bandwidth limited then your code could run up to 16 percent faster. If memory bandwidth doesn't matter to you, then you may see no improvement. Most codes will probably fall somewhere in between.