Along with Intel® Xeon® E3-1268L V3 processor (quad-core @ 2.3 GHz or turbo frequency @ 3.3 GHz), ATC121 features x16 PCIe Gen 3 slot that accepts any PCIe edge-type module. Dual RJ-45, USB, and RS-232 ports are standard, and graphics ports include dual Display Port input as well as DVI-D and Display Port outputs. Customized versions afford different I/O front panel options. Also available are optional mSATA sockets (for expanded storage) and on-board VT003 shelf manager.