The Inspiron 530s has the same design as the 530, but it is 41% slimmer. However, because of its design, it is not physically compatible with all desktop hardware, especially graphics cards (Dell only gives you the option of the ATI 2400 XT, which is not a high performance card). The case used in the 530s can accommodate one 5.25" optical drive, one external 3.5" drive (either a 1.44Mb floppy or 19-in-1 card reader), and up to two standard 3.5" hard drives. The motherboard used in the 530s is the exact same Foxconn G33m02 mATX motherboard used in the Inspiron 530. While almost any low profile PCI-E x16 video card will physically fit in the 530s, the custom sized Delta 250W power supply that the 530s is equipped with may seriously limit the potential for using higher end cards.