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+RAMspeed is a command line utility to measure cache and memory performance of
+computer systems. It offers 18 cache and memory benchmarks for i386 and amd64
+machines, though 6 only for alpha ones. There are *mark benchmarks such as
+INTmark, FLOATmark, MMXmark and SSEmark. They operate with linear (sequential)
+data streams passed through ALU, FPU, MMX and SSE units respectively.
+There are also *mem benchmarks such as INTmem, FLOATmem, MMXmem and SSEmem.
+These are supposed to illustrate how fast is actual read/write memory
+performance. There are also non-temporal versions of MMX and SSE benchmarks.
+They have been coded with special instructions to minimise cache pollution on
+memory reads and to eliminate it completely on memory writes. In addition, they
+operate with a built in aggressive data prefetching algorithm. In some cases,
+non-temporal MMXmark and SSEmark can deliver almost 100% of theoretical
+bandwidth while reading. 
+
+WWW: http://alasir.com/software/ramspeed/