Hey @bluedog1us , hope that you found your answer but I also like to add that if you are using eMachines Desktop PC ET1331G and having slow RAM issue, then I will suggest you to find the most compatible and fastest DDR2 RAM Memory for your system. Here I like to mentioned one of the best memory supplier Memory4Less.com where you can find all types of computer ram from top brands like Crucial, Samsung, IBM, Kingston, Micron and more. Please take a review at http://www.memory4less.com/crucial-memory-upgrades?filter=capacity:8gb;memorytype:...-memory-upgrades&sz=20 and find the most compatible ram for your ET1331G Desktop PC.