Specification: 2GB RAM | DDR2 | 200 pin DIMM | SO DIMM | 667MHz PC2-5300S | 1.8 Volt The memory is 100% compatible with the Acer Aspire 5720G. The memory has been tested and released to the device. The memory of the Acer Aspire 5720G device can be adjusted to max. 2 GB.