To my new Toshiba laptop C70-A-153 with only 4GB of RAM I have to buy these bars. It is 100% compatible with the built-in, which is particularly gratifying because the original Toshiba PA5104U-bar retrofit 1M4G insane 119, - cost impact assessment (EIA). The Kingston costs only about one-third. He is a DDR3L memory with 1.35V as 1.5V works (in Toshiba notebook it is operated with 1.35V). It should be compatible with all Toshiba laptops that have installed the bolt PA5104U-1M4G or PA5104U-1M8G (8GB). Type: 204-pin SODIMM Capacity: 4GB (4096MB) Memory Type: DDR3L (DDR3 Low Voltage) Effective clock: 1600MHz (I / O clock: 800MHz) CAS latency: 11 Memory Bus: 64bit Error detection: Non-ECC Registered: No Buffered: No Memory organization: 512Mb x 64 Number of Chips: 8 EAN: 0740617219784