Assume just one DIMM is used in a system, and the rest of the system costs $800. Consider the performance of the system using the DDR2-667 and DDR2-533 DIMMs on a workload with 3.33 level 2 misses per 1K instructions, and assume all DRAM reads require an activate. Assume all 8 cores are active with the same workload. What is the cost divided by the performance of the whole system when using the different DIMMs assuming only one level 2 miss is outstanding at a time and an in-order core with a CPI of 1.5 not including level 2 cache miss memory access time?