I purchased a lot of computer equipment from a university IT department.  Most of the operating systems and hard drives have been removed.  I really don't know much about computers or the specs.  Please view the pictures for what you will receive. 

Item: Dell Optiplex 755 Model: DCSM w Windows Vista Business COA - No Power Supply.  Please see photos.    

Bin: 21I-KSUSAL 

Inventory ID: C-G6163, C-P6164, C-O6165, C-LP6166 

Rack: 20.9