The RB4011 uses the amazingly powerful quad core Cortex A15 chip from Annapurna labs, an Amazon company, same as in our carrier grade RB1100AHx4 unit. The CPU supports IPsex hardware acceleration, there is 1GB of RAM, so this device will easily handle any task you have configured RouterOS to perform. All of this power, in a compact, fanless and professional looking solid metal enclosure in matte black. RB4011iGS+RM - In addition to the ten 1 Gbps ethernet ports, an SFP+ port provides optional 10 Gbps connectivity through an SFP+ module (not included). All of this power, in a compact and professional looking solid metal enclosure in matte black. The ethernet model includes two rackmount ears, that will securely fasten the unit in standard 1U rack space.