12 Lenovo System x3850 X6 and x3950 X6 Quick Start Guide
General eXFlash DIMM population rules are as follows:
– A maximum of four processor books can be configured with eXFlash DIMMs.
– For the x3950 X6, the primary node (lower processor books) must host the eXFlash
DIMM modules.
Population rules for up to eight eXFlash DIMMs and up to eight memory modules in a
Processor Book (two DIMMs per channel is 1333 MHz) are as follows:
– RDIMMs install to DIMM slots 9, 6, 1, 10, 15, 24, 19, 16
– eXFlash DIMMs install to DIMM slots 8, 5, 2, 11, 14, 23, 20, 17
Population rules for up to eight eXFlash DIMM and up to 16 memory modules in a
Processor Book (two DIMMs per channel is 1333 MHz) are as follows:
– RDIMMs install to DIMM slots 9, 6, 1, 10, 15, 24, 19, 16, 8, 5, 2, 11, 14, 23, 20, 17
– eXFlash DIMMs install to DIMM slots 7, 4, 3, 12, 13, 22, 21, 18
I/O subsystem
Figure 8 shows an overview of the I/O layout of the x3850 X6 server.
Figure 8 I/O layout of the x3850 X6 server
4x hot-swap power supplies:
• 750 W AC
• 900 W AC
• 1400 W AC
1x Primary I/O Book:
• 2x PCIe 3.0 x16 (x16 wired)
• 1x PCIe 3.0 x16 (x8 wired)
• 1x Mezz LOM (ML2) PCIe 3.0 x8
(2x 10 GbE or 4x 1 GbE options)
• 1x internal USB 2.0 for hypervisor
• 4x external USB 2.0
• 1x DB9 serial
• 1x DB15 video
• 1x RJ45 IMM2 management
Optional I/O Book 1 and I/O Book 2:
• Half-length book:
– 1x PCIe 3.0 x16 (x16 wired)
– 2x PCIe 3.0 x8 (x8 wired)
• Full-length book:
– 2x PCIe 3.0 x16 (x16 wired)
– 1x PCIe 2.0 x8 (x4 wired)
• Support hot swap
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