“Every thing is good except DDR3.Can you replace DDR3 with DDR4? Is 22 in used monitor inclouded in th offer. Please confirm I need three computers.”

Dell - Refurbished Excellent - OptiPlex Desktop Tower Computer PC | Intel Core i7-6th 3.40GHz | 16GB RAM | 512GB SSD | 22" LED | KB & Mouse| Win11 - Black