Three miniPCI slots and three Ethernet ports give you enough connectivity options to use the RB433 as the central part of your network. In addition to our regular model, the AH version adds more RAM and our popular high-speed Atheros 680MHz CPU making this the perfect universal choice for serious networks. A microSD card gives you the ability to add more storage for Webproxy cache, logs, or Metarouter virtual machines. The RB433AH comes with a 680MHz Atheros CPU and is preinstalled with a Level5 RouterOS license. RouterBOARD 433AH with Atheros 680Mhz (800MHz factory tested) CPU, 128MB RAM, three LAN, three MiniPCI, microSD slot, Voltage Monitor, Fan headers, NAND Storage with RouterOS Level 5 (AP support)