How to Identify RDRAM & DDR RAM Chips
Anytime you see a computer term that ends in RAM, you are dealing in memory. Random Access Memory (RAM) is directly responsible for how quickly your computer can access and/or process data by storing information before your computer uses it, acting as "middlemen." You can identify different types of RAM by the number of pins it has to "talk" to your computer's brain or the type of slot in the motherboard your RAM is housed in.
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Instructions
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Determine the form factor of the memory chip you are looking for based on the age of your computer and its original RAM type. The form factor is the size and shape of the memory chip and includes set numbers of pins, or connectors, that match the connectors in the slot on the motherboard. Older computers will have Single Inline Memory Modules (SIMMs) which are not compatible with DRAM or DDR RAM.
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Dynamic Random Access Memory (DRAM) can only be inserted into Dual Inline Memory Modules (DIMMs) on the motherboard. RDRAM is a proprietary variant of DRAM manufactured by Rambus, and will have the company's name visibly printed on the form factor.
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Double-Data-Rate (DDR) Synchronous Dynamic RAM (SDRAM), DDR RAM for short, is based on the same architecture as DRAM and can be inserted into the same type of DIMMs as DRAM or RDRAM. DDR is visibly printed on the form factor for clear identification.
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