Hi, I'm upgrading the RAM in my neighbours laptop which is an Acer Aspire 5742, model PEW71. It came with 3GB RAM from Kingston, ACR256X64D3S1333C9 and ACR128X64D3S1333C9, which are 1.5V, PC3-10600.
I purchased 2 modules from eBay, both Kingston 99U5469-045.A00LF, which are 1.35V PC3L-12800. I...