BOXD865GLCL Intel, BOXD865GLCL Datasheet - Page 36

• Manufacturer Part Number: BOXD865GLCL
• Manufacturer: Intel

Specifications of BOXD865GLCL

• Lead Free Status / Rohs Status: Supplier Unconfirmed

Intel Desktop Board D865GBF/D865GLC Technical Product Specification
1.8.1.3
1.8.1.4
1.8.1.5
36
DVMT enables enhanced graphics and memory performance through Direct AGP, and highly
efficient memory utilization. DVMT ensures the most efficient use of available system memory
for maximum 2-D/3-D graphics performance. Up to 64 MB of system memory can be allocated to
DVMT on systems that have 256 MB or more of total system memory installed. Up to 32 MB can
be allocated to DVMT on systems that have 128 MB but less than 256 MB of total installed system
memory. Up to 8 MB can be allocated to DVMT when less than 128 MB of system memory is
installed. DVMT returns system memory back to the operating system when the additional system
memory is no longer required by the graphics subsystem.
DVMT will always use a minimal fixed portion of system physical memory (as set in the BIOS
Setup program) for compatibility with legacy applications. An example of this would be when
using VGA graphics under DOS. Once loaded, the operating system and graphics drivers allocate
additional system memory to the graphics buffer as needed for performing graphics functions.
NOTE
The use of DVMT requires operating system driver support.
The Intel Extreme Graphics 2 Controller supports Zone Rendering Technology (ZRT). ZRT is a
process by which the screen is divided into several zones. Each zone is completely cached and
rendered on chip before being written to the frame buffer. The benefits of ZRT include the
following:
The Rapid Pixel and Text Rendering Engine (RPTR) architecture utilizes special pipelines that
allow 2D and 3D operations to overlap. By providing 8X compression, the RPTR engine reduces
the memory bandwidth required to read texture memory, and reduces the amount of memory
required for texture storage.
A dedicated, non-blocking, multi-tier cache is provided for textures, colors, Z and vertex
rendering. With single-pass, quad texture support, the drivers can submit up to four textures that
pass to the graphics engine concurrently. The graphics core can switch between 2D and 3D
operations without having to complete all operations of the same mode, which minimizes the
overhead time required in switching between modes.
A 2D Block Level Transfer (BLT) in the RPTR engine is extended to 256-bit, which supports fast
blitter fill rate. This enables the blitter sequence of the same addresses to access the cache and
offloads the memory bandwidth required to support blitter fill rate. Then the cache is emptied
automatically when the sequence of operations are complete.
Increased memory efficiency via better localization of data
Increased on-chip processing speed due to decreased wait time for data
Increased effective pixel fill rates
Increased headroom for larger resolution and color depth
Reduced power as a result of decreased memory bandwidth
Reduction in depth and color bandwidth associated with conventional rendering
Dynamic Video Memory Technology (DVMT)
Zone Rendering Technology (ZRT)
Rapid Pixel and Text Rendering (RPTR)