what is difference between 11-11-B3 and 11-12-B4 ?

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eyoav

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Dec 12, 2013
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Hello,

I have HP Pavilion n003ej and I want to upgrade my memory.
I have kingston 4GB 1Rx8 PC3L-12800S-11-11-B3.
I want to add Hynix 4GB 1Rx8 PC3L-12800S-11-12-B4.
What 11-11-B3 means and what is the difference and? can I mix them together?

Thank you.
 
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eyoav

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Dec 12, 2013
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Thanks, but what is difference between 11-11-B3 and 11-12-B4 ? speed ?
 
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eyoav

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Dec 12, 2013
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and the B3 or B4? what it means? what is difference?
will it slow my computer? Will there be a change in the speed of the computer?
 
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MIPShog

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The first 11 is the CAS timing. The second 11 or 12 is the version of Serial Presence Detect (SPD) used for communication between the RAM module and the computer. The B3 or B4 is the reference design file used for this design and Revision number of the reference design used.

The CAS timing is what matters.
 
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zysinger

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The first 11 is the CAS timing. The second 11/12 is the version of Serial Presence Detect (SPD) used for communication between the RAM module and the computer. The B3/B4 is the reference design file used for this design and Revision number of the reference design used.

The CAS timing is what matters. The lower the number the fewer clock cycles it takes so in effect its faster. In this case, they would perform identically, although the B4 is technically a newer version.
 
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