Abit AB-CX6, Руководство пользователя

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Introduction of CX6 Features 1-3
User’s Manual
scalable O riginal E quipment M anufacturer (OEM) motherboard riser board and interface,
which supports both audio and modem functions. The specification's main objective is to
reduce the baseline implementation cost of audio and modem functionality. In accordance
with PC user's demands for feature-rich PCs, combined with the industry's current trend
towards lower cost PCs, all of theses functions are built into the motherboard. But
motherboard integration of the modem subsystem has been problematic to date, in large part
due to FCC and other international telecom certification processes that may delay the
introduction of a motherboard. Resolving the homologation/certification issue for modems
is one of the AMR specification's key objectives.
In the future, not only OEM motherboards will have an AMR design, the AMR card will
appear in the market and you can make a choice in buying this kind of card according to your
budget. But your motherboard must have an AMR slot to be able to plug an AMR card. The
CX6 insures this expansibility for this issue.
Yamaha YMF752-S audio chip
YMF752 is an AC’97 Audio CODEC LSI, which is fully compliant with the industry
standard “Audio CODEC ’97” component specification (Revision 2.1).
YMF752 includes a SRC (Sampling Rate Converter) for support variable sampling rate,
which can work the A/D and D/A converter at different rate. YMF752 has an AC-Link serial
interface, which can be used with digital controller LSI. Therefore, YMF752 is the best
audio solution for both laptops and desktop PCs as well as AMR (Audio Modem Riser) and
MDC (Mobile Daughter Card).
YMF752 also supports low power consumption while normal operating and allows for
controlling the power down mode.
Direct Rambus Technology
During the past few years, computer main memory has become the speed bottleneck that has
blocked improved system performance. This is true despite the fact that DRAM densities
have been accelerating sharply from yesterday's 1Kbit per chip to today's 64Mbit devices.
While that aspect of DRAM technology has advanced by a factor of 1,000 in the past 10
years, the time it takes to access main memory has improved by only a factor of five. The
result is that memory bandwidth, the number of bytes per second that can be moved across
memory I/O, has been hobbled. That sluggish performance improvement is now a severe
drag on systems powered by microprocessors that have improved CPU performance 200
fold in the same timeframe.