What type of ram card will work with 545s

i own a 545s with 6gb of ram. i want to upgrade to 8. 2 are 2gb and 2 are 1gb. i want to replace the 1gb cards with two 2gb cards. what specs do i need to know before ordering? the current ram is ddr2 so, i know i need the other two to be ddr2 as well.
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More about what type card work 545s
  1. Is that a Dell Inspiron 545S ?
    If yes, you need to order 2 X 2Gb 800MHz Dual Channel DDR2 SDRAM slots.
    But to be on the safe side , since you want to continue to use the already existing DDR2 2Gb RAMs you have already installed, you need to be sure that you get the same make and model of the older 2GB RAMS so you don't see a performance drop,
    Hope fully you're using a 64Bit edition of windows.....
    To check the Make and Model of the RAMs that you already have and want to keep, you can either open the case and remove them and check the thing, but, preferred idea would be to download CPUz from http://www.cpuid.com/softwares/cpu-z.html
    and check the Memory tab in it and then place your order for the new RAM
  2. You should be using a windows 64bit or you waste the 8Gb.
    Ok 2Gb to replace the 1Gb is should be same make to avoid problems.
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