The full size I/O supports all ATX motherboard and up to seven full-height add-on cards.  One 120mm and 80mm cooling fans in the front and additional one 80mm fans can be mounted in the rear to provide the best ventilation to prevent critical equipment from heat damage. RM-4160S3 provides server or cluster maximum reliability and performance.

RoHS Compliance Version	Yes
Standard Drive Bays	Slim CD Drive: 1 3.5" Drive: 2
Mainboard Size (inch)	12 x 10
Cooling Fan [Option]	1x120mm 2x80mm [1x80mm]
Indicators	LEDs for Power ON/OFF and HDD
Switches	Power ON/OFF and System Reset
Material of Main Chassis	Zinc-Coated Steel
Color of Main Chassis	Black
Front Connector	Front USB 2.0 x 2 Connector
Dimensions (W x H x D)	19 x 7 x 13.7 inch