There are 5 PCIe slots in the Netra SPARC T4-1 system: PCIe slots 0, 1,2, 3, and 4. PCIE card slot 0 and slot 1 are shared with XAIU cards and can be populated with either PCIe cards or XAUI cards. Slots 0, 1 and 2 support only low profile PCIe cards. Slots 3 and 4 support both low profile and full height/half length PCIe cards.
To optimize cooling and performance, follow these card installation rules:
Low profile PCIe cards should be installed into slot 0 first, then slots 1, 2, 3 and finally slot 4. If XAUI cards are installed in slot 0 and 1, the low profile PCIe cards should be installed into slot 2 first, then slot 3, and finally slot 4.
The full height/half length cards should be installed into slot 3 first, then slot 4.