The Ibm Power8 Processor - IBM Power System E850C Technical Overview And Introduction

Figure 2-6 shows the logical design of the Power E850C server with four processor modules
installed.
CPU Planar
CDIMMs
PCIe
x16
Op-panel
Storage
BackPlane
8 SFF
4 1.8" SSD
DVD
Figure 2-6 Logical diagram for a Power E850C server with four processor modules installed

2.3 The IBM POWER8 processor

The POWER8 processor is manufactured by using the IBM 22 nm Silicon-On-Insulator (SOI)
technology. Each chip is 649 mm
12 cores, two memory controllers, and an interconnection system that connects all
components within the chip. On some systems, only 6, 8, 10, or 12 cores per processor might
be available to the server. Each core has 512 KB of L2 cache, and all cores share 96 MB of
L3 embedded dynamic random access memory (eDRAM). The interconnect also extends
through module and board technology to other POWER8 processors in addition to DDR3
memory and various I/O devices.
POWER8 systems use memory buffer chips to interface between the POWER8 processor
and DDR3 or DDR4 memory. Each buffer chip also includes an L4 cache to reduce the
latency of local memory accesses.
For an in-depth discussion on the POWER8 processor, see the IBM Power System E850
Technical Overview and Introduction, REDP-5222 at:
http://www.redbooks.ibm.com/abstracts/redp5222.html
Max
Processor Module 2
24 GBps
Chip-0
Chip-1
48 PCIe G3 lanes
Max
24 GBps Processor Module 0
Chip-0
CDIMMs
Chip-1
PCIe
48 PCIe G3 lanes
x16
PCIe Gen3 x16 FHHL slot C3
PCIe Gen3 x16 FHHL slot C4
PCIe
x16
PCIe
x8
SAS Cntrl
PCIe
RAID #1
x8
SAS Cntrl
RAID #2
RAID Backplane
2
Processor Module 3
Chip-0
Chip-1
48 PCIe G3 lanes
Processor Module 1
Chip-0
Max 19.2 GBps
Chip-1
48 PCIe G3 lanes
Service Processor card
2 x 1GE, 1 x Serial
PCIe PCIe
2 x USB 2.0
x16 x8
PCIe Gen3 x16 FHHL slot C10
PCIe Gen3 x16 FHHL slot C12
PCIe Gen3 x8 FHHL slot C11
and contains 4.2 billion transistors. The chip contains
Chapter 2. Architecture and technical overview
Max
24 GBps
CDIMMs
Max
24 GBps
CDIMMs
PCIe
x16
PCIe
PCIe Gen3 x16 FHHL slot C1
x16
PCIe Gen3 x16 FHHL slot C2
PCIe
PCIe Gen3 x16 FHHL slot C8
x16
PCIe Gen3 x16 FHHL slot C9
PCIe
x8
PCIe Gen3 x8 FHHL slot C6
PEX PCIe Gen3 x8 FHHL slot C7
USB 3.0 (2 x Front, 2 x Rear )
IO Planar
PCIe
x16
29