I have an Acer Aspire E1-572 and just purchased a Kingston KVR13S9S8/4 (1333Mhz/1.5V) to upgrade it to 8GB RAM but the system doesn't detect the new memory.
Running "# dmidecode -t 17" I got this for the RAM shipped with the laptop:
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