Hardware Reference
In-Depth Information
16 lanes
PCI Express 2.0
Graphics
16 GB/s
DDR3
1333 MHz
or
Intel
Core i7
8 lanes
PCI Express 2.0
Graphics (optional)
DDR3
1333 MHz
8 GB/s
8 lanes
PCI Express 2.0
Graphics (optional)
8 GB/s
DMI
20 Gb/s
Intel High
Definition Audio
480
Mb/s
each
5 Gb/s
each ×1
Intel P67
Express
Chipset
8 PCI Express 2.0
14 Hi-Speed USB 2.0 Ports;
Dual EHCI; USB Port Disable
6 Serial ATA Ports; eSATA;
Port Disable
Intel Integrated
100/1G/10G MAC
Up to
6 Gb/s
2
PCIe ×1
SM Bus
Intel Rapid Storage
Technology (optional)
Intel Gigabit LAN
Connect
2 GB/s DMI
480
Mb/s
12 Hi-Speed USB 2.0 Ports;
Dual EHCI; USB Port Disable
Intel High
Definition Audio
each
ICH10
ICH10R
500
Mb/s
each ×1
3
Gb/s
each
6 Serial ATA Ports; eSATA;
Port Disable
6 PCI Express ×1
Intel Integrated
10/100/1000 MAC
PCI
LPC
or SPI
GLCI
LCI
Intel Gigabit LAN
Connect
BIOS Support
Figure 3-52.
The bus structure of a modern Core i7 system.
1G Ethernet, USB ports, and old-style PCI Express and SATA interfaces. Newer
systems may not incorporate the ICH10; it is required only if the system needs to
support legacy interfaces.
PCI Bus Operation
Like all PC buses going back to the original IBM PC, the PCI bus is syn-
chronous. All transactions on the PCI bus are between a master, officially called
the
initiator
, and a slave, officially called the
target
. To keep the PCI pin count
