Cray/SGI memory latencies

• System Memory Clock Ratio FP ops FP ops to cover

• latency speed per clock memory

• [ns] [ns] period latency

• CDC 7600 275 27.5 10 1 10

• CRAY 1 150 12.5 12 2 24

• CRAY 120 8.5 14 2 28

• X-MP

• SGI Power

• Challenge ~760 13.3 57 4 228

• CRAY

• T3E-900 ~280 2.2 126 2 252

• This and following foils from Performance of the CRAY T3E Multiprocessor by Anderson, Brooks, Grassi and Scott at http://www.cray.com/products/systems/crayt3e/1200/performance.html

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