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6-2 www.hp.com Technical Reference Guide
Integrated Graphics Processor
6.2 Functional Description
These systems include a graphics subsystem based on the ATI Radeon 3100 controller integrated
into the AMD RS780 North Bridge (Figure 6-1). The ATI Radeon 3100 operates off the internal
PCIe x16 bus and can directly drive an analog multi-scan monitor or a DVI-D-compatible digital
monitor. The ATI Radeon 3100 includes a memory management feature that allocates portions
of system memory for use as the frame buffer and for storing textures and 3D effects.
Figure 6-1. Integrated Graphics Processor, Block diagram
The IGP provides the following features:
■ Fully DirectX 10-compliant 32-bit floating point
■ Shader Model 4.0 geometry and pixel support
■ Anti-aliasing filter 11
■ Aniosotropic filtering
■ Advanced texture compression
■ 3D resources virtualized to a 32b addressing space
■ Vertex cache/fetch design
■ Full 64b and 132b support for tectures and surfaces
■ Up to 8K x 8K texture support (including 128b/pixel texture)
■ Multi-level texture cache
■ Upgradeable through the PCIe x16 graphics slot
■ Multi-monitor support with SurroundView™ technology
The IGP uses a portion of system memory for the frame buffer. The amount of memory used by
the IGP may by user-configured (in BIOS) to 32, 64, 128, or 256 megabytes, or set to Automatic.
In Automatic mode, the BIOS will select the optimum amount of memory.
RGB
RS780
ATI
Controller
Monitor
(System
DDR2
PCIe x16 Graphics Slot
DDR2 Controller
SDRAM
Memory)
DVI-D
Monitor
Analog
Digital
PCIe I/F
PCIe x1 Slot
PCIe
Radeon
3100
North Bridge
PCIe
PEG data
Processor
data