Yes you can migrate your OS to the ssd, however, this is highly not recommended. It is always better to do a fresh/clean install. This will mitigate many issues you could/would encounter with a migration. Bad alignment, slow speeds, etc. I like to think that my current setup is optimal. OS on Samsung 840 PRO 256Gb ssd, dedicated gaming Samsung 840 PRO 128Gb ssd, storage Seagate 2Tb hdd. The storage drive also handles the Windows temp files, etc. A Samsung 840 PRO 128Gb ssd is fairly cheap right now.