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Simm = Single In-line Memory Module.

Dimm = Dual In-line Memory Module.

Rimm = RDRAM In-line Memory Module.

Simms were common from the early 1980s to the late 1990s. Simms and Dimms are very similar, except that Dimms have electrical contacts on each side of the module, while the contacts on SIMMs on both sides are redundant. Also, Simms are 32bit, Dimms are 64bit.

Rimms are obsolote, and were only used by very few Intel Pentuim 3 based motherboards, and early Pentuim 4 motherboards, and while perfomace was good, they were over 3 times the cost of similar SD Ram (Dimm) ram sticks. That, and the manufacturer of RDRAM Rimms taking various other companines in the Ram market to court are ther main reason why RDRAM is no longer used.

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11y ago

SIMM(Single in-line Memory) it has a small circuit board which is designed to hold memory chips. The control circuit board contains pins for accepting data. These circurit boards or mudules are known as packages. The SIMM packages varies based on the number of pins it contains. There ar e30 pin packages and 72 pin packages.

WhileRIMM(Ranbus inline Module) has a data storage speed of 600MHz, 711MHz, 800 MHz and 1066MHz. The RDAM chip uses the RIMM memory package. The DIMM package is the RDRAM. The pin configuration differs. The bandwidth and the low voleny application use thi s in its memory package.

The capacities of a 30 pin SIMM package arew 25KB, 1MB, 2MB, 4MB,8MB and 16MB . A 30 pin SIMM package has a data bus width of 8bits with 9 bit parity. Parity checks the accuracy of the data transmitted. An odd parity and an even parity are the two modes of parity checking.

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Q: What is the major difference between SIMM and RIMM memory modules?
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