Trying to upgrade my Hard drive

Solution
Your board supports SATA 3 interface so no issue at all. Go for your desired HDD. Depending upon the usage of the HDD you may go for any option with WD or Seagate. If you need performance go for WD Black Caviar (Operates aty 7200 RPM). If the drive is supposed to have backup storage for songs/movies/data etc you may go for WD Green (Operates at 5900 RPM) or Seagate available option.

http://www.dell.com/downloads/global/products/optix/en/opti_745techspecs.pdf
Your board supports SATA 3 interface so no issue at all. Go for your desired HDD. Depending upon the usage of the HDD you may go for any option with WD or Seagate. If you need performance go for WD Black Caviar (Operates aty 7200 RPM). If the drive is supposed to have backup storage for songs/movies/data etc you may go for WD Green (Operates at 5900 RPM) or Seagate available option.

http://www.dell.com/downloads/global/products/optix/en/opti_745techspecs.pdf
 
Solution