2 System Board

Memory Controller Hub (82850)

 

RIMM Memory Slots

 

The HP Kayak XU700 PC Workstation has four RIMM memory sockets,

 

RIMM A1, RIMM A2, RIMM B1, RIMM B2, for installing two or four RDRAM

 

memory modules.

 

Each pair of memory sockets must contain identical memory modules

 

(identical in size, speed and type). That is, sockets A1 and B1 must contain

 

identical modules, and sockets A2 and B2 must contain identical modules

 

(or continuity modules).

 

 

If only two RDRAM modules are installed, use the sockets marked A1 and

 

B1. The other two sockets (A2 and B2) must contain continuity modules.

 

If only Each DIMM socket is connected to the SMBus and is described on

 

page 49.

Read/Write Buffers

The MCH defines a data buffering scheme to support the required level of

 

concurrent operations and provide adequate sustained bandwidth between

 

the DRAM subsystem and all other system interfaces (CPU, AGP and PCI).

System Clocking

The MCH operates the System interface at 100 MHz or, PCI at 33 MHz and

 

AGP at 66/133 MHz. Coupling between all interfaces and internal logic is

 

done in a synchronous manner. The clocking scheme uses an external clock

 

synthesizer (which produces reference clocks for the host, AGP and PCI

 

interfaces).

41