6. (1.5 marks) DRAMs are commonly sold on small boards called dual inline memory modules (DIMMs). DIMMs typically contain 4 to 16 DRAMs, and they are normally organized to be8 bytes wide (+ ECC) for desktop and server systems. Consider a desktop system with a processor connected to a 2 GB DRAM with error-correcting code (ECC). Assume that there is only one memory channel of width 72 bits (64 bits for data and 8 bits for ECC). a) How many DRAM chips are on the DIMM if 1 GB DRAM chips are used, and how many data I/Os must each DRAM have if only one DRAM connects to each DIMM data pin? b) What burst length is required to support 32 B L2 cache blocks? c) Calculate the peak bandwidth for DDR2-667 and DDR2-533 DIMMs for reads from an active page excluding the ECC overhead. 6. (1.5 marks) DRAMs are commonly sold on small boards called dual inline memory modules (DIMMs). DIMMs typically contain 4 to 16 DRAMs, and they are normally organized to be8 bytes wide (+ ECC) for desktop and server systems. Consider a desktop system with a processor connected to a 2 GB DRAM with error-correcting code (ECC). Assume that there is only one memory channel of width 72 bits (64 bits for data and 8 bits for ECC). a) How many DRAM chips are on the DIMM if 1 GB DRAM chips are used, and how many data I/Os must each DRAM have if only one DRAM connects to each DIMM data pin? b) What burst length is required to support 32 B L2 cache blocks? c) Calculate the peak bandwidth for DDR2-667 and DDR2-533 DIMMs for reads from an active page excluding the ECC overhead