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Motherboard Description
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Accelerated Graphics Port (AGP) Controller
¡ X AGP Specification Rev. 2.0 compliant
¡ X Supports 266 MHz 4x mode for AD and SBA signaling
¡ X Supports SideBand Addressing (SBA) mode (non-multiplexed
address/data)
¡ X Pipelined split-transaction long-burst transfers up to 1GB/sec
¡ X Intelligent request reordering for maximum AGP bus utilization
¡ X AGP Expansion graphics override the integrated graphics by default
with no SMA frame buffer
1-9 CHIPSET
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VT8605
The VT8605 is a high performance, cost-effective and energy efficient
SMA chip set for the implementation of AGP / PCI / LPC desktop
personal computer systems with 66 MHz, 100 MHz and 133 MHz CPU
host bus ("Front Side Bus") frequencies and based on 64-bit Socket-370
(VIA-Cyrix-III and Intel Celeron) and Slot-1 (Intel Pentium II and
Pentium-III) super-scalar processors. In other words, the VT8605 is the
P6-bus version of the Apollo ProSavage integrated graphics product line
targeted at desktop PCs, developed by the VIA / S3 joint venture. The
VT8605 may also be referred to by product name PM133 in VIA and
S3 marketing literature.
The VT8605 integrates VIA VT82C694X system controller and S3
Savage4 2D/3D graphics accelerator into a single 552 BGA package. The
VT8605 SMA system controller provides superior performance between
the CPU, DRAM, AGP bus, and PCI bus with pipelined, burst, and
concurrent operation.
The VT8605 supports six banks of DRAMs up to 1.5Gbyte of system
memory with 256Mbit DRAM technology. The DRAM controller supports
standard Synchronous DRAM (SDRAM) and Virtual Channel SDRAM
(VC SDRAM), in a flexible mix / match manner. The Synchronous
DRAM interface allows zero wait state bursting between the DRAM and
the data buffers at 66/100/133 MHz. The six banks of DRAM can be
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SY-7VMA-B
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