Installing RAM - What is Channel A or B?

Sony Vaio vgc-rb40 desktop
January 27, 2011 at 13:52:14
Specs: Windows XP
I have just installed 512 of RAM, but now when my PC boots it states that RAM should be installed equally for Channel A and Channel B for optimum performance. I don't know which "channel" is which. I have four slots: 1=256, 2=new 512, 3=256, 4=empty. Should they be in a different order? Thanks for any help!

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January 27, 2011 at 14:14:06
You have 4 ram slots and 3 sticks of ram installed. If you use 2 sticks in channel A or channel B it will use dual channel mode which is optimal. You could add another 512 stick in the 4th slot. look at your mobo manual to see what is designated channel A and B. It will work fine the way you have it, but it won't run in dual channel mode with 3 sticks.

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January 27, 2011 at 19:22:13
Should have two different colors white and blue etc.

the one closest to the cpu is usually A .

Goes A B A B

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