The pre-installed firmware was the 1.5 and it is the latest and very stable i didnt need to upgrade. But this is for the 512GB. I don't know about other capacities if they are shipping with the latest firmware. Worst case, you can download the ocz toolbox from ocz website and upgrade to the latest firmware. But be carefull, the firmware update might be destructive (it may erase all the contents) so make sure you do the update before installing and restoring all your files and programs.