SDRAM

•           Synchronous Dynamic Random Access Memory

•          Tecnically correct name is SDR SDRAM

•          4 to 6 times faster than FPM and EDO RAM

•          Linked to the system clock on motherboard (Unlike FPM and EDO) – resulting in less time wasted by the processor waiting for data

•          (66, 75, 83, 100, 133) Mhz are the common SDRAM speeds

•          N.B. SDRAM speed must be equal to or faster than the motherboard speed

•          168-pin DIMMs

•          PC100/133 standards

•          Maximum transfer rate to L2 cache is 528 MBps

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Double Pumping

•          First used with AMD Athlon processor

•           Enabled the Athlon to send/receive two bits of data with every clock cycle to/from the Northbridge

•           Effectively doubles the system bus speed (motherboard speed)

•           Athlons with 100 Mhz or 133Mhz FSBs between the Northbridge and the CPU ran at 200Mhz or 266Mhz

•           Double Pumping systems use DDR SDRAM

        Double Pumping

•          First used with AMD Athlon processor

•           Enabled the Athlon to send/receive two bits of data with every clock cycle to/from the Northbridge

•           Effectively doubles the system bus speed (motherboard speed)

•           Athlons with 100 Mhz or 133Mhz FSBs between the Northbridge and the CPU ran at 200Mhz or 266Mhz

•           Double Pumping systems use DDR SDRAM