9Internal componentsNo. Description1 Altos G701 model - Power supply module bay for redundantPSU 11 Though the system supports two hot-swappable power supply module bays, thesystem comes bundled with a single power supply module only. You have the option topurchase an extra power supply module to provide the system with redundant powersource.2 Rear system fan3 Rear system fan release latch4 PCI bus slot5 Mainboard6 Air baffle7 Power distribution board8 Hot-swap HDD fans9 Hot-swap HDD backplane board