RAM Installation

[aldago]

I have a Pavilion a1020n with WindowsXP. There are four memory slots with slots one and three containing 256MB RAM. I want to add 2GB additional RAM using two matched 1GB memory sticks. Shall I put the 1GB sticks in slots two and four or pair them with using adjacent slots with 256MB and the other two slots with 1GB, should I put the 1GB pair closest to the CPU or doesn't it make any difference? Maybe I'm making a mountain out of a molehill but the HP video tutorial on RAM installation says there's a difference in performance depending on how the RAM is installed. Thanks for any help.

[Big_Dave · Accepted solution]

Hi,

Typically with dual channel you want to populate bank 0 (the first slot) for each channel as currently installed in your PC. Then to add additional memory you would then just fill in the empty slots with dimms.

With some PCs, the higher density memory dimms need to be installed in the first slot of each channel. I can't say for sure if this restriction applies to your particular PC.

The below articles may offer additional explanations.

This is an Intel dimm layout document for single, dual, triple and flex mode memory configurations. Remember this article is for Intel boards but it does have good information.

You can download and use CPU-Z to determine if your memory is operating in dual channel mode. You should use it before you install additional memory to make sure dual channel is operating correctly and then again to ensure that dual channel is still operating correctly.  With CPU-Z, look under the Memory TAB.

[hinojose]

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