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Possible Duplicate:
Matched DRAM — Why? Is it important?

I'm building a machine with the following motherboard and processor.

MSI 890FXA-GD65 Socket AM3/ AMD 890FX/ DDR3/ SATA3&USB3.0/ A&GbE/ ATX Motherboard AMD Athlon II X2 Dual-Core Processor 240 (2.8 GHz) AM3 1GB DDR3-1333 PC3-10600

Do I need multiple DIMMs for this setup to function?

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marked as duplicate by Daniel Beck, Sathya Jun 7 '11 at 6:08

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

Not necessarily, but installing memory in matched pairs will ensure optimum performance. A computer will function with only one module or with modules with different sizes or speeds, but performance will be less than optimal; furthermore, if memory with different speeds are used, both modules will be limited to that of the slower module. If matched pairs are used, they can work together to increase performance, but you can operate a modern computer with only one memory module. For more information, see the Wikipedia article on dual-channel architecture.

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