Intel S5500WB, Specification

Page: 41 / 117

Intel® Server Board S5500WB TPS Functional Architecture
Revision 1.9
Intel order number E53971-008
27
Table 6. IOH24D PCI Express* Bus Segments
PCI Bus Segment Width Speed Type PCI I/O Card Slots
Port 0
ICH10R
x4 10 Gb/s PCI Express*
Gen1 x4 PCI Express* Gen1 throughput to the ICH10R
southbridge
PE1, PE2
Intel
®
5500 Chipset
IOH PCI Express*
x4 10 Gb/s PCI Express*
Gen1 x4 PCI Express* Gen1 throughput to an onboard NIC.
PE3,
Intel
®
5500 Chipset
IOH PCI Express*
X4 20 Gb/S PCI Express*
Gen2 X4 PCI Express* Gen2 throughput to slot 1.
PE7, PE8
Intel
®
5500 Chipset
IOH PCI Express*
x8 40 Gb/S PCI Express*
Gen2 x8 PCI Express* Gen2 throughput to the slot 6 riser .
PE9, PE10
Intel
®
5500 Chipset
IOH PCI Express*
x8 40 Gb/S PCI Express*
Gen2 x4 PCI Express* Gen2 throughput to each of the two
Intel
®
I/O Expansion Module connectors.
3.5.1.1 Direct Cache Access (DCA)
The DCA mechanism is a system-level protocol in a multi-processor system to improve I/O
network performance by providing higher system performance. It is designed to minimize cache
misses when a demand read is executed. This is accomplished by placing the data from the I/O
devices directly into the CPU cache through hints to the processor to perform a data pre-fetch
and install it in its local caches. The Intel
®
5500 series and 5600 series processor supports
Direct Cache Access (DCA). You enable or disable DCA in the BIOS processor setup menu.
3.5.1.2 Intel
®
Virtualization Technology for Directed I/O (Intel
®
VT-d)
The Intel
®
Virtualization Technology is designed to support multiple software environments
sharing the same hardware resources. Each software environment may consist of an operating
system and applications. You can enable or disable the Intel
®
Virtualization Technology in the
BIOS setup. The default behavior is disabled.
Note: If the setup options are changed to enable or disable the Virtualization Technology
setting in the processor, the user must perform an AC power cycle for the changes to take
effect.
The Intel
®
5500 Chipset IOH supports DMA remapping from inbound PCI Express* memory
Guest Physical Address (GPA) to Host Physical Address (HPA). PCI Express* devices are
directly assigned to a virtual machine leading to a robust and efficient virtualization.
3.6 Management Engine
The Management Engine (ME) is an embedded ARC controller within the IOH. The IOH ME
performs manageability functions called Intel
®
Server Platform Services (SPS) for the discrete
Baseboard Management Controller (BMC).