A cage can include a thermal plate positioned so as to be aligned with a bottom of a channel. An adjustable biasing system is provided to urge a module toward the thermal plate. The adjustable biasing system may be a riding heat sink. The thermal plate may include a fin to help increase its surface area. A housing with a card slot aligned with the channel can be provided in the cage to provide a receptacle that has a card slot aligned with the channel. A receptacle so configured allows for greater thermal energy to be removed from a module.