Just buy a set of these if you want to max out the ram on the Acer E5-771G (the max is 16GB this was near impossible to find), I specifically have the -52PR model so your mileage may vary but it went in like nothing -- no problems. https://www.gskill.com/product/2/159/153...-1600C9S-8GRSLRipjaws-DDR3-SO-DIMMDDR3L-1600MHz-CL9-9-9-1.35V8GB-(1x8GB) now ill drift back into the web looking for a *!&$!&$^ schematic on the DA0ZYWMB6E0 mainboard that is in this laptop so I can figure out why this %#*@ webcam isn't working (not showing in device manager) is it windows 10? is it broken? did I forget to plug it in when I took this laptop apart WHO KNOWS.....