The item MS4096AC-NB135 is a memory upgrade for the ACER TravelMate P277-M series, which comes with 4 GB of RAM by default. The ACER TravelMate P277-M series can be upgraded to a maximum of 16/32 GB of RAM. For maximum memory expansion, the device has 2 slots. Sometimes, the manufacturer's specifications for maximum memory expansion are outdated and may differ from our information. This is due to the rapid advancement of technology or the revisions of memory manufacturers changing so quickly that they can hardly keep up with certification, or older models may not be validated again at all. Here, Memorysolution steps in with extensive testing and guarantees you continuous availability of the upgrade, far beyond the manufacturer's production cycle. Our qualified memory module for the ACER TravelMate P277-M series is fully functional even under full load and absolutely meets the specifications.