The only advantage I can think of is the situation when one of modules fails and still have another one to work with.
As the memory speed is limited, you essentially double the available speed by having two modules, as they run in parallel. The efficiency is generally increased by 20-30% by having two 512mb modules rather than one 1GB module.
DIMM- DUAL INLINE MEMORY MODULE RIMM - RAMBUS INLINE MEMORY MODULE SIMM SINGLE INLINE MEMORY MODULE
Though you'll hardly notice it - speed is the advantage. If a computer has two memory modules, it has to switch between the two while in use. A single chip with twice the capacity is fast - because the computer doesn't have to waste time switching.
Ram bus Inline Memory Module
None, other than the fact that you are taking up motherboard slots for future upgrades.
SODIMMs(Small Dual Inline Memory Modules)
DIMM stands for dual inline memory module
There is no disadvantage other than you are using up slots that you might want to use later for upgrading.
ECC stands for Error Checking and Correction. This type of memory module is used to correct memory errors within the computer registry. ECC memory modules generally have 9 chips compared to 8 chips in a non-ECC memory module. This is the easiest way to differentiate the two.
There are a number of different names. They are usually in the form of SIMMs (Single Inline Memory Modules), and people often call them just memory modules. Some also call them memory cards or memory sticks. They may go by other names based on the exact chips and how they are wired, such as DDR, DDR2, DDR3, and so on.They are sometimes called MultiChip Modules. When their sole function is RAM they can be called Memory Modules.Sometimes they are identified by the type of connector: SIMM, DIMM, UDIMM, SODIMM, etc.Memory Modules (memory card)
1. DIMM modules are open standard. SIMM modules are copyrighted standard.
Some domestic uses for a memory module include use in a computer, or server in a office or workspace. Memory modules come in different sizes and can be applied to a variety of hardware.