My IT provider is convincing me there is no difference between a 2Rx4 and a 2Rx8 RAM. A little digging around informed me that x4 means 4 bits on a chip vs x8 means 8 bits. Which is good, but what difference does that make?
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There's not enough information to say which is better. When looking at RAM you probably care about a number of things:
The 2Rx4 and 2Rx8 DIMMs may well give you different characteristics for many reasons, but you'd need to ask your vendor about those characteristics directly. | |||
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First and foremost, the difference is that they are completely incompatible with each other for use in most server boards. If you're replacing an existing memory module you must either match the given designation perfectly or replace the whole bank with the new type. If you're evaluating a completely new configuration, then see Tom Shaw's answer, and when checking compatibility, the "1x" means "Single Rank" and "2x" means "Double Rank" if the system specifications call for one or the other specifically. | |||
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