Lenovo v15 g4 ryzen 7 7730u launch date July 8, 2019 16 32 64 128 Lenovo v15 ryzen 3 Lenovo v15 ada ryzen 5 Lenovo thinkbook 15 g2 ryzen 7 4700u Lenovo thinkpad e15 gen 3 ryzen r7-5700u
