Move TEMPDB to another location

I tried moving the location of TEMPDBusing following script

USE master
GO
ALTER DATABASE tempdb
MODIFY FILE (NAME = tempdev, FILENAME = 'C:\tempdb2005.mdf')
GO
ALTER DATABASE tempdb
MODIFY FILE (NAME = templog, FILENAME = 'C:\tempdb2005.ldf')
GO

AFter moving i restarted sql server and went to drives and seeif it got moved. Tempdb size was 6 GB and only 10 MB got moved. Not sure is therwe anything else missing from this which need to account for. Any help much appreciated.