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2 System Board
Memory Controller Hub (82850)
Memory Controller Hub (82850)
The MCH Host Bridge/Controller is contained in a 615-pin Organic Land
Grid Array (OLGA) package and is the bridge between the System bus,
Dual Rambus bus (main memory), AGP 4x (graphic) bus and Hub Link 8-
bit.
The following figure shows an example of the system block diagram using
the MCH.
I850 Memory
Controller Hub (MCH)
82850
Dual Rambus Bus
Address (36)
Control
Data (64)
AGP 4x Bus
(133 MHz (1 GB MB/s
data transfer rate)
HUB LINK 8
(266 MB/s data
transfer rate)
I/O Controller Hub
(ICH2) 82801BA
3.2 GB/s at 400 MHz-
data transfer rate
AGP
Interface
Memory
Controller
1.5V
AGP
PRO
Connector
Socket 423
Intel Pentium 4
Processor
4 onboard RIMM sockets
supporting RDRAM memory.
100 MHz two-way System Bus
(Data Bus runs at 4 x 100 MHz,
3.2 GB/s transfer rate)