This is an error related to the hard disk, not to the video card. Ext3-fs error (sda5)
means error of the ext3 filesystem on the fifth partition of the first disk. The first thing you can do is to run a diagnostic tool for the hard drive. Try to get the proper one on the manifacturer's website. If the disk is damaged, most likely you have to change it.
In any case, do a backup of your evaluable data on some external device. Always.