Dell™ PowerEdge™ R710 Technical Guidebook33sectiOn 11. i/O slOtsa. Overview / DescriptionThe PowerEdge R710 requires two PCI Express risers: Riser 1 and Riser 2. Each riser connects to theplanar through an x16 PCI Express connector.• Riser 1 consists of two x4 slots and a third x4 slot dedicated for internal SAS storage throughthe PERC 6i or SAS 6/iR.• The default Riser 2 consists of two x8 PCI Express connectors.• There is also an optional x16 Riser 2 that supports one x16 PCI Express card.To ensure proper cooling, no more than two of the four expansion cards can have a power consumptionof greater than 15W (up to 25W maximum each), not including the integrated storage controller.The system does not support hot-plug or hot-removal of PCI Express cards.The table below provides a guide for installing expansion cards to ensure proper cooling and mechanicalfit. The expansion cards with the highest priority should be installed first using the slot priority indicated.All other expansion cards should be installed in card priority and slot priority order.caRDPRiORity caRD tyPe slOtPRiORitymaxallOWeD25WcaRD?1 PERC 5/E controller 1, 3, 4 2 Y2 PERC 6/E 3, 4, 1 2 Y3 10Gb NIC 3, 4, 1, 2 2 Y4 All other Dell storage cards 3, 4, 1 2 Y5 All other NICs 2, 1 4a Nb6 Non-Dell storage cards 1, 2 4 a Nba Maximum of 2 of any card whose maximum power exceeds 15wb Refer to the expansion card’s documentation to determine if the maximum power exceeds 15w