NEC SP B-Series - Manual (Page 16)

Technical Information 1-5
Audio Connectors – Minitower Models
A – Line Out Jack B – Line In Jack
C – Microphone Jack D –MIDI/Game Port
System Board
The system board contains most of the components that provide system
functions. The following subsections provide a description of these components.
Processor
The system board uses a 350-MHz, 400-MHz, or 450-MHz Intel Pentium II
processor or a 500-MHz Intel Pentium III processor. All use MMX technology.
The MMX processor improves audio, video, and 3D graphics performance.
Each processor is packaged in a Single Edge Contact (SEC) cartridge that plugs
into the system board’s slot 1.
System Cache/Memory
To use the processor’s power, the system features an optimized 64-bit memory
interface and provides support for a second level cache to complement the
processor’s internal cache.
High-performance features include:
T pipeline 32-bit addressing
T 64-bit data
T 512-KB of pipeline burst secondary cache; direct mapped write-back and
write-through organization.
The system comes with 32 to 384 MB of main system memory. Three sockets
on the system board support up to 384 MB of high-speed memory using
industry-standard gold-plated dual in-line memory modules (DIMMs).
The system supports PC100-MHz Synchronous DRAM (SDRAM) only.