can i ask why majority of asus notebook is with 2gb ddr3? them listed when i want to download driver at asus website.. i also saw the k42jP and k42jY but no like As for touchpad, is it elantech or synaptics? View and Download Asus K42JY user manual online. Asus K42JY: User Guide. K42JY Laptop pdf manual download. Also for: A42jy, A52f-xn1, A52n-xe1. The oversized touchpad has a smooth surface. This is a multitouch clickpad; press down anywhere to produce a click. As with many ASUS-branded notebooks.