The old laptop I originally installed these DDR2 RAM modules in only sees a total of 3GB. So I installed a new 2GB + 1GB in each of the two laptops; both are now maxed out by 3GB. The increase in laptop speed isn't spectacular, but it's noticeable. FYI, the biggest and best improvement was going from the original HDD to an SSD running Linux Mint 20.1. Perfect!
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