Dell OptiPlex - Core 2 Duo E8400 3 GHz - New 4GB Memory - Windows 10 Home x64 (Certified Refurbished) This certified reconditioned product is tested and certified by the manufacturer or by a third-party seller to look and work like new, with some signs of wear. The reconditioning process includes functionality testing, inspection and repackaging. New 4GB Memory. Windows 10 Home x64. 3.0 GHz Intel Core 2 Duo CPU E8400! 160 GB SATA HDD - DVD-RW. New Power Cord!