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Unbuffered and Buffered Ram

P

Phonetic

n00b
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Jul 7, 2006
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5
I was reading an article that briefly mentioned buffered and unbuffered ram. The gist of the article was that any IT person needs to know what that is, and that was it.

Is there anyone here that can explain buffered and unbuffered ram, because wikipedia doesn't have an article on it and google hasn't been giving me any love.
 
all you really need to know is that buffered ram is for servers, and unbuffered ram is for normal desktop pc's :D
 
I guess a basic description of it would be that buffered has additional circuits to improve signal strength. It only becomes really useful when you start dealing with a lot of ram or if the chips are spaced out a bunch. Hence it's usually seen with servers because those are the only systems typically using more than say 2-4 memory sticks. It runs at slightly reduced speeds(unless you change the timings) compared to unbuffered memory and is slightly more expensive.
 
quick google search turns up this:

# What is meant by Registered memory

"Registered" is a means of "Buffering" the memory in SDRAM. This means that the clock signal is boosted across the entire array of memory chips so that the computer sees a clean sharp clock signal instead of a weakening clock signal as it progresses along the length of the memory path. Registered memory must be supported by the system board and cannot be mixed with "Unbuffered" modules. You must have only Registered memory to use Registered memory. This is a further means of eliminating the possibility of errors when reading the data in memory and is used when the data returned from memory is extremely critical, such as in scientific or financial calculations where the integrity of the data is CRITICAL. It also allows a module to be built using more chips, allowing for larger capacity modules to be made.
Click to expand...
http://www.gen-x-pc.com/memory_faq.htm
 
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