To get a 4 socket motherboard you HAVE to use windows server OS or Linux. Windows 7 or 8 or 10 will support dual socket but not quad. That OS limitation makes a quad socket gaming machine impractical. Having to use an E5-4xxx CPU or an E7-xxxx CPU makes it cost prohibitive. If you have an extra $40K to $50K then Dell, HP, SGI, or IBM would be happy to sell you a quad socket server.