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20 Chapter 4: Matrox Odyssey XG hardware reference
connector #2
connector #1
PCI controller
Memory interface
Matrox Odyssey XG architecture
Matrox Odyssey XG is a high-performance PCI/PCI-X display board. It features
a 256-bit graphics processing unit (GPU), two high-speed link ports, and up to
128 Mbytes of on-board memory. In addition, Matrox Odyssey XG supports fast
writes, which effectively double the data rate between the GPU and Host.
Matrox Odyssey XG
On-board
memory
(32/64/128 MB)
DVI
Matrox
256-bit GPU
DVI
Matrox 256-bit GPU
The Matrox 256-bit GPU features a 190 MHz processing core with support for
advanced 2D and 3D acceleration. In addition, it features a 32-bit PCI controller
and a 128-bit memory interface.
The on-chip PCI controller provides the GPU with a 32-bit, double-data rate
(DDR) bus to the Host. The GPU can communicate with the Host at up to 66
MHz (effectively 133 MHz), for a maximum data rate of 528 Mbytes/sec.
The GPU features a 128-bit DDR memory interface, which runs at 190 MHz.
This provides a bandwidth of 6.1 Gbytes/sec between the GPU and on-board
main memory.
Link Port A
64
(up to 1 GB/s)
Link 2
128 DDR
(up to 6.1 GB/s)
32
Link 1
(up to
528 MB/s)
Host 3.3 V PCI/PCI-X bus
Link Port B
64
(up to 1 GB/s)
Link 3
SIB
Link 0
64 (up to 1 GB/s)
Link 2
SIB
Link 0
64 (up to 1 GB/s)
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