PC100 SDRAM
(PC100 Synchronous DRAM)
Manufacturer: IntelŪ Speed: 8ns
Year Introduced: 1998 Frequency: 100MHz
Burst Timing: 4-1-1-1 Pins: 168
Voltage: 3.3v Bandwidth: 800MBps

     PC100 SDRAM is synchronous DRAM (SDRAM) that states that it meets the PC100 specification from IntelŪ. IntelŪ created the specification to enable RAM manufacturers to make chips that would work with IntelŪ's i440BX processor chipset. The i440BX was designed to achieve a 100MHz system bus speed. Ideally, PC100 SDRAM would work at the 100MHz speed, using a 4-1-1-1 access cycle. It's reported that PC100 SDRAM will improve performance by 10-15% in an IntelŪ Socket 7 system (but not in a PentiumŪ II because its L2 cache speed runs at only half of processor speed).
     To develop this type of Memory, a set of specifications has been developed by IntelŪ and was endorsed by most of the Memory manufacturers. IntelŪ established a very precise set of specifications and guide lines to ensure compatibility between Memory modules of any brands. The IntelŪ PC100 compliance specifications are ensuring robust Memory operation from suppliers that meet these specifications and this is a great benefit to both the industry and the end users. In addition to IntelŪ providing specs for PC100 devices and DIMMs, IntelŪ has released module gerber (raw card) design files. Vendors using these raw card design files will have much more consistency than those using their own raw card design files.

     PC 133 SDRAM is downward compatible with PC 100 SDRAM memory.



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