CPU onboard,You can choose what CPU you want. Q330G4 Intel Core i3-40005 Processor 3M Cache, 1.70 GHz Haswell Q335G4 Intel Core i3-5005U Processor, 3M Cache, dual core 2.0 GHz Processor Q350G4 Intel Core i5-4200U Processor, 3M Cache, dual core 1.6 GHz, up to 2.6 GHz. Q355G4 Intel Core i5-5200U Processor, 3M Cache, dual core 2.2 GHz, up to 2.7 GHz Processor Q300G4 1U Rack Product Description Active cooling(CPU FAN) Intel AES New Instructions: YES Secure Key: Yes Memory: 1 x DDR3L SODIMM Memory Slot Support DDR3 1333/1600 MHz, Max. 8GB Memory Storage:support 1x mSATA SSD 1 x 2.5-inch HDD/SSD Front-Panel Connectors • 1 x Power Button • 1 x Power LED • 1 x Serial Port (RS-232) • 1 x HD Video Port • 2 x USB 2.0 & 2 x USB 3.0 Back-Panel Connectors • 1 x DV 12V DC input • HDD LED, Power LEDs • 4 x Intel I211-AT- 10/100/1000 Controller • 1 x Speak Out Connector • 1 x Mic In Connector Internal Connectors • 1 x Full Mini pcie slot (for mSATA SSD) • 1 x SATA connector • 1 x Half Mini pcie slot (for WIFI/Bluetooth Module) • 1 x DDR3L SO-DIMM Memory Slot • 1 x Automatically boot jumper Operating System 1)Mini PC supports Windows, Linux, pfSense, CentOS, Sophos, OPNsense, VyOS, Linux iptables, Untangle, etc. It will comes with inactive Windows 10 inactive and without any Windows license. If you prefer to install other OS, please leave a message,you also can reinstall OS by yourself. 2)F11 key boot from USB Drive. Delete key enter BIOS. Packing List 1 x Mini PC 1 x Power supply: adapter and plug (US/ UK/ EU/ AU/ IT standard) 2 x ears 1 x Packaing box 2 x Antennas if order Wi-Fi.(If you choose Wifi option) We Usually ship BY DHL to USA,you could receive the shipment within 4-5 days If there are no special circumstances.