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what is the difference between 2-clock and 4-clock memory? two types of sdram modules are the 2-clock and the mx 4-clock module. structurally, they are the same, but they are accessed differently. a 2-clock sdram module is set up so that each clock cycle accesses two chips on the module. a 4-clock sdram setup accesses 4 chips per clock cycle. to choose what kind to get, you must look into the motherboard''s documentation. 4-clock modules are the more commonly used. the typical indication of the wrong type being used is a system giving error beeps and not booting as it cannot use the memory installed. the system will not proceed past post (power on self test). 2-clock was only used in 66 mhz systems. all pc 100 and pc 133 memory is 4-clock only. do all of your sdram modules use spd? spd, or serial presence detect, is a program in an eeprom chip on the modules of sdram (synchronous dynamic random access memory). it tells the system’s bios what the specifications and settings of the memory module are. all of our sdram dimms have spd programming. the system bios should therefore be set on autodetection for memory.

what is the difference between 2-clock and 4-clock memory? two types of sdram modules are the 2-clock and the mx 4-clock module. structurally, they are the same, but they are accessed differently. a 2-clock sdram module is set up so that each clock cycle accesses two chips on the module. a 4-clock sdram setup accesses 4 chips per clock cycle. to choose what kind to get, you must look into the motherboard''s documentation. 4-clock modules are the more commonly used. the typical indication of the wrong type being used is a system giving error beeps and not booting as it cannot use the memory installed. the system will not proceed past post (power on self test). 2-clock was only used in 66 mhz systems. all pc 100 and pc 133 memory is 4-clock only. do all of your sdram modules use spd? spd, or serial presence detect, is a program in an eeprom chip on the modules of sdram (synchronous dynamic random access memory). it tells the system’s bios what the specifications and settings of the memory module are. all of our sdram dimms have spd programming. the system bios should therefore be set on autodetection for memory.

what is rambus memory? rambus is a chip to chip interface design that is system wide, allowing up to 800 mhz transfer rates. it allows data transfer through a simplified bus that operates in a high frequency range. rambus uses a low 1200 voltage signal swing with data transfer on both edges of a synchronizing clock pulse. the intel pentium iv cpu is designed to take full advantage of this new, extremely fast memory design. what is ddr memory? ddr memory, or double data rate memory, is an evolutionary new memory technology mx that doubles the data through put to the processor, or cpu. it is an evolution of sdram, which leverages the existing production and environment to provide higher pc performance. what is meant by registered memory? "registered" is a means of "buffering" the memory in sdram. this means that the clock signal is boosted across the entire array of memory chips so that the computer sees a clean sharp clock signal instead of a weakening clock signal as it 1200 progresses along the length of the memory path. registered memory must be supported by the system board and cannot be mixed with "unbuffered" modules. you must have only registered memory to use registered memory.

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