I have an Acer Aspire E1-572 and just purchased a Kingston KVR13S9S8/4 to upgrade it to 8GB RAM but the system doesn't detect the new memory.
The info about the original RAM that came with the laptop is as follows (# dmidecode -t 17):
Memory Device
Array Handle: 0x000F
Error Information Handle: No Error
Total Width: 64 bits
Data Width: 64 bits
Size: 4096 MB
Form Factor: SODIMM
Set: None
Locator: ChannelB-DIMM0
Bank Locator: BANK 2
Type: DDR3
Type Detail: Synchronous
Speed: 1600 MHz
Manufacturer: 0114
Serial Number: 04211349
Asset Tag: 9876543210
Part Number: SF564128CJ8NWMNSEG
Rank: 1
Configured Clock Speed: 1600 MHz
Minimum Voltage: 1.35 V
Maximum Voltage: 1.5 V
Configured Voltage: 1.35 V