Specification: 4GB RAM | DDR3 | 204 pin DIMM | SO DIMM | 1333MHz PC3-10600S | 1.35 volt The memory is 100% compatible with Asus U30SD-RO058V. The memory has been tested and released to the device. The memory of the device Asus U30SD-RO058V can be adjusted to max. 16 GB.