Paper - CPU and GPU usage for password recovery

"Let's start with CPUs. Intel Core 2 (and its successor Core i7) is capable to perform up to three ALU instructions per clock cycle. As we want to reach highest performance possible we'll definitely need to use SSE extension (so everything written below assumes that we're using SSE). Thus we have 3 instructions with 4 32-bit operands each == 12 instructions per clock. Unfortunately not every instruction can run on this highest rate. In fact it's only possible for simple logic like OR, XOR, AND. Integer additions already limited to 2 per clock. And only one shift is possible per clock. Single precision floating point (SPFP) also can be done at rate of one instruction per clock, this applies to multiple and addition (this is important for comparison with GPU and will be used later)..."
http://www.golubev.com/about_cpu_and_gpu_2_en.htm

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