24 IBM System x3850 X6 and x3950 X6 Planning and Implementation Guide
2.3.1 Intel Xeon processor E7-4800/8800 v2 product family
There are two groups of the Intel Xeon processor E7 family that are used in the X6 servers
and support scaling to separate levels:
The Intel Xeon processor E7-4800 v2 product family is used in the x3850 X6. This family
supports four-processor configurations.
The Intel Xeon processor E7-8800 v2 product family is used in the x3950 X6 to scale to
eight-socket configurations.
The X6 systems support the latest generation of the Intel Xeon processor E7-4800 v2 and
E7-8800 v2 product family, which offers the following key features:
Up to 15 cores and 30 threads (using Hyper-Threading feature) per processor
Up to 37.5 MB of L3 cache
Up to 3.4 GHz core frequencies
Up to 8 GT/s bandwidth of QPI links
Integrated memory controller with four SMI2 channels that support up to 24 DDR3 DIMMs
Up to 1600 MHz DDR3 memory speeds and up to 2667 MHz SMI link speeds
Integrated PCIe 3.0 controller with 32 lanes per processor
Intel Virtualization Technology (VT-x and VT-d)
Intel Turbo Boost Technology 2.0
Intel Advanced Vector Extensions (AVT)
Intel AES-NI instructions for accelerating of encryption
Advanced QPI and memory reliability, availability, and serviceability (RAS) features
Machine Check Architecture recovery (non-execution and execution paths)
Enhanced Machine Check Architecture Gen1
Machine Check Architecture I/O
Security technologies: OS Guard, Secure Key, Intel TXT
Table 2-1 compares the Intel Xeon processor E7-4800/8800 v2 product families used in X6
systems with the Intel Xeon processor E7-4800/8800 product families that are used in IBM
eX5 servers.
Table 2-1 eX5 and X6 processors comparisons
Feature eX5 family X6 family
Processor family Intel Xeon E7-8800
Intel Xeon E7-4800
Intel Xeon E7-8800 v2
Intel Xeon E7-4800 v2
Processor codenames Westmere EX Ivy Bridge EX
Cores per CPU Up to 10 cores Up to 15 cores
Last level cache Up to 30 MB L3 cache Up to 37.5 MB L3 cache
QPI QPI 1.0 at 6.4 GT/s max QPI 1.1 at 8.0 GT/s max
CPU TDP rating Up to 130W Up to 155W
DIMM sockets 16 DIMMs per CPU 24 DIMMs per CPU
Maximum memory speeds 1067 MHz DDR3 2667 MHz SMI2
PCIe technology PCIe 2.0 (5 GT/s) PCIe 3.0 (8 GT/s)
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