Intel System Board G4H875-B User Manual page 8

1
Introduction
Performance Acceleration Technology (PAT)
PAT mode is supported only when the system uses DDR400
with 800MHz FSB CPU. PAT performs data transactions directly
from the CPU to the system memory, bypassing the normal path
of operation. This reduces the MCH timing therefore providing
improved system performance.
Expansion Slots
• 1 AGP slot
• 4 PCI slots
• 1 PCI-X 64-bit/66MHz slot
AGP (Accelerated Graphics Port)
• Supports AGP 3.0 (AGP 4x and 8x) and AGP 2.0 (AGP 1x and
4x) spec.
• Supports 1.5V AGP 8x (2.13GB/sec.) and AGP 4x (1066MB/
sec.) add-in cards.
AGP is an interface designed to support high performance 3D
graphics cards for 3D graphics applications. It handles large
amounts of graphics data with the following features:
• Pipelined memory read and write operations that hide
• Demultiplexing of address and data on the bus for nearly
8
Density 128 Mbit
X8
Density Width
SS/DS
Single/Double
128/256MB
184-pin DDR
memory access latency.
100 percent efficiency.
Note:
AGP 2x and 3.3V AGP cards are not supported.
256 Mbit
X16 X16
X8
SS/DS SS/DS
SS/DS
64MB/NA 128MB/NA
256/512MB
512 Mbit
X8 X16
SS/DS SS/DS
512/1024MB 256MB/NA