Chapter 2. Technology 21
If you want to take advantage of this recovery, it is important to carefully plan your network
and storage connectivity, because if CPU 1 fails, PCIe slots 9, 10, and 12 become
unavailable.
2.2.2 x3950 X6
The x3950 X6 server has the same architecture adapted to 8-socket configuration.
Figure 2-14 and Figure 2-15 show the system architecture of the x3950 X6 server
(Figure 2-15 shows the upper half, and Figure 2-14 shows the lower half).
Figure 2-14 x3950 X6 (bottom half)
SMI
links
MB 2
MB 1
X6 DDR3
Compute Book
QPI links
MB 2
MB 1
MB 2
MB 1
MB 2
MB 1
MB 2
MB 1
DMI links
Slot 7: PCIe 3.0 x16 (x16)
Slot 9: PCIe 3.0 x16 (x16)
MB 2
MB 1
MB 2
MB 1
MB 2
MB 1
8x USB
Serial
Management
Video
IMM2
PCIe x1
Slot 10: Mezz LOM (x8)
Slot 12: PCIe 3.0 x16 (x8)
Slot 8: PCIe 3.0 x16 (x8)
Slot 11: PCIe 3.0 x16 (x8)
Slot 1: PCIe 3.0 x16 (x16)
Slot 2: PCIe 3.0 x8 (x8)
Slot 3: PCIe 3.0 x8 (x8)
Slot 4: PCIe 3.0 x16 (x16)
Slot 5: PCIe 2.0 x8 (x8)
Slot 6: PCIe 3.0 x16 (x16)
Storage Book
Primary I/O Book
PCIe 3.0 lanes
Full Length I/O Book
Half Length I/O Book
PCIe 3.0 lanes
Intel
Xeon
CPU 3
Intel
Xeon
CPU 4
Intel
Xeon
CPU 1
Intel
Xeon
CPU 2
QPI link (to CPU 7)
QPI link (to CPU 8)
QPI link (to CPU 5)
QPI link (to CPU 6)
PCIe
switch
Intel
I/O Hub
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