Datasheet

Intel Xeon Processor E7-8800/4800/2800 Product Families Architecture
16 Datasheet Volume 2 of 2
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Figure 2-2. Intel® Xeon® Processor E7-8800/4800/2800 Product Families Block Diagram
Table 2-2. System Interface Functional Blocks
Name Function
Core Intel Xeon Processor E7-8800/4800/2800 Product Families core
architecture processing unit
Bbox Home Agent
Cbox Last Level Cache Coherency Engine
Mbox Integrated Memory Controller
Pbox Physical Layer (PHY) for the Intel
®
QPI Interconnect and Intel
®
SMI
Interconnect memory controller
Rbox Crossbar Router
Sbox Caching Agent
Ubox System Configuration Agent
Wbox Power Controller
Intel
®
SMI Intel
®
Scalable Memory Interconnect (formerly “FBD2” or “Fully
Buffered DIMM 2 interface”)
Intel
®
QPI Intel
®
QuickPath Interconnect
LLC Last Level Cache (Level 3)
Core
3
Core
2
Core
4
Core
5
Core
6
Core
7
Core
8
Core
9
Cbox (LLC Coherence Engine)
Rbox
(Router)
30M Last Level Cache (L3 Cache)
Sbox
(Caching Agent 2)
Bbox
(Home
Agent 1)
Bbox
(Home
Agent 2)
Mbox
(Memory
Controller)
Mbox
(Memory
Controller)
Pbox
(Physical
Layer)
Pbox
(Physical
Layer)
Sbox
(Caching Agent 1)
Pbox
(Physical
Layer)
Pbox
(Physical
Layer)
Pbox
(Physical
Layer)
Pbox
(Physical
Layer)
4 Intel® QPI links
Dual Intel
®
SMI
Channels
Dual Intel
®
SMI
Channels
Wbox
(Power Controller)
Ubox
(System Config
Controller)
Core
10
Core
1