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Whats the Difference between these two modules???

post #1 of 7
Thread Starter 
This one:

http://www.crucial.com/uk/store/part...PN=CT12864Z40B

and this one:

http://www.crucial.com/uk/store/part...PN=CT12872Z40B

Other than the £50 price difference
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post #2 of 7
The second DIMM you linked to supports ECC while the first is non ECC.
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post #3 of 7
the Cheaper has NON-ECC and the more expensive one ahs ECC, which i think is Error Correction Circuitry, but im not overly sure thats what ECC stands for but that is what creates the price difference
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post #4 of 7
Unless you have a server motherboard (socket 940), you don't need ECC Registered stuff.
post #5 of 7
Quote:
Originally Posted by iker0
the Cheaper has NON-ECC and the more expensive one ahs ECC, which i think is Error Correction Circuitry, but im not overly sure thats what ECC stands for but that is what creates the price difference
I'm pretty sure that's what it means. It's mainly used for servers where accuracy and stability are more important than getting the FSB out of it.
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post #6 of 7
Thread Starter 
Never noticed that!!

I have a stick of the EEC stuff running in my PC right now! Does it make a difference in terms of overclockability? Its just that I've managed to get module to run at 295 (T2 though).
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post #7 of 7
ECC means that the DIMM has a ninth bit for error correction checking. If there are one bit errors in the memory, it can automatically fix it. ECC is usually used in servers which need more secure data however it is not the same as Registered memory.

You can buy ECC memory that is unbuffered (that's what you call non registered memory) and you can also get Registered memory that do not have ECC compatibilty. Registered memory is completely different although a subject of another discussion.

Rampant ECC memory usually doesn't overclock well, you're better off getting non ECC memory.
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