WHITE PAPER (cont’d) Compaq Workstations - Key Technologies
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COMPAQ HIGHLY PARALLEL SYSTEM ARCHITECTURE
The Compaq Professional Workstation 6000 has been designed with a Highly Parallel System
Architecture that maximizes system bandwidth to improve performance in demanding
applications. Most workstations in the Intel based Windows NT market support two CPUs to
process instructions concurrently. However, overall system bandwidth is limited since each
CPU must compete for access to critical subsystems such as memory and I/O whose bandwidth
has not been correspondingly increased.
The Highly Parallel System Architecture used with the Compaq Professional Workstation 6000
addresses the need for greater overall system bandwidth by using dual memory controllers, dual-
peer PCI buses, and advanced multiprocessing support.
Diagram 1: The Compaq Highly Parallel System Architecture.
Dual Memory Controllers
The Compaq Professional Workstation 6000 uses dual memory controllers that can process
memory requests in parallel, significantly increasing overall memory bandwidth. Other
workstations in the Intel based Windows NT market offer memory bandwidth of either
267MB/second or 533MB/second depending on the chipset used. The Compaq Professional
Workstation 6000 uses two memory controllers, each with a bandwidth of 533MB/second.
Therefore, total memory bandwidth increases to 1.07GB/second- two to four times that of other
systems.
Diagram 2: Dual Memory Controllers Architecture.