Intel E7-8891 v2 CM8063601377422 User Manual

Product codes
CM8063601377422
Page of 504
Intel
®
 Xeon
® 
Processor E7-2800/4800/8800 v2 Product Family
45
Datasheet Volume Two: Functional Description, February 2014
IIO Functional Description
6
IIO Functional Description
6.1
Integrated I/O Module Overview
The IIO module provides:
• x32 PCI Express interface for general purpose PCI Express devices at 3.0 speeds
• x4 DMI interface for the southbridge component (PCH) or a x4 PCIe Gen2 device
• Intel
®
 QuickData Technology DMA Engine to support IOAT, ROL and External 
Storage Usages
• IOxAPIC controller used to convert legacy interrupts from I/O devices into 
messages to the CPU’s Local APIC
• I/O Virtualization Logic (Intel VT-d2)
• Security features to support Intel TXT
6.1.1
PCI Express* Features
• Compliant with the PCI Express Base Specification, Revision 2.0 and Revision 3.0
• Two x16 PCI Express 3.0 interface configurable to x8 and x4 links.
Figure 6-1. Integrated I/O Module High-level Block Diagram
Vtd-2
Coherency Engine
Write Cache
IOAPIC
Crystal 
Beach 
DMA
PCIe Gen3
DMI
x4
x4
x4
x4
x8
x8
x16
PCIe Gen3
x4
x4
x4
x4
x8
x8
x16
HP
HP
x4
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