User Guide

8965 N/B Maintenance

further improvement of overall system performance.

System Power Management

For sophisticated power management, the PN800 supports dynamic CKE control to minimize DDR SDRAM power

consumption during normal system state (S0). A separate suspend power plane is implemented for the memory

control logic for Suspend-to-DRAM state. Enhanced Intel SpeedStep™ Technology enables minimization of CPU

power consumption while sustaining processing power. The PN800 graphics accelerator implements dynamic clock

gating for inactive functions to achieve maximum power savings. The system can also be switched to standby or

suspend states to further reduce power consumption when idle.Automatic panel power sequencing and VESA

DPMS (Display Power Management Signaling) CRT power-down are supported.Coupled with the VT8235-CE

South Bridge chip, a complete power conscious PC main board can be implemented with no external glue logic.

3D Graphics Engine

Featuring an integrated 128-bit 3D graphics engine, the PN800 North Bridge utilizes a highly pipelined architecture

that provides high performance along with superior image quality. Several new features enhance the 3D

architecture, including two pixel rendering pipes, single-pass multitexturing, bump and cubic mapping, texture

compression, edge anti-aliasing, vertex fog and fog table, hardware back-face culling, specular lighting, anisotropic

filtering and an 8-bit stencil buffer. The chip also offers the industry’s only simultaneous usage of single-pass

multitexturing and single-cycle trilinear filtering – enabling stunning image quality without performance loss.

Image quality is further enhanced with true 32-bit color rendering throughout the 3D pipeline to produce more

vivid and realistic images. The advanced triangle setup engine provides industry leading 3D performance for a

realistic user experience in games and other interactive 3D applications. The 3D engine is optimized for AGP

texturing from system memory.

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