    AST RESEARCH, INC.        TECHNICAL BULLETIN # 1663          02/11/97

    TITLE:  CPU Upgrades and Advantage! 4066

    ISSUE

       The Advantage! 4066 series computers use a fixed 5 volt supply
       and a 168 pin LIF (Low Insertion Force) socket for CPU (Central
       Processing Unit) installation.  Not all CPU chips in this format
       will work as an upgrade.

       This issue affects all Advantage! 4066 systems.

    BACKGROUND

       N/A

    ACTION

       AST Support has tested several commercially available processor
       upgrade kits which seem compatible. One such upgrade is produced
       by Evergreen Technologies. The processor upgrade module comes
       with good documentation and provides a moderate (40% to 45%)
       performance increase. Product information and a list of
       authorized dealers is available from Evergreen's Web site at
       www.evertech.com.

       To physically install the Evergreen upgrade, refer to the
       documentation included. After the processor module is properly
       configured and installed, it is necessary to reset the Advantage!
       system board jumpers. The following chart indicates working
       jumper settings for the upgrade kit tested.

       Evergreen P/N 248

       This module consists of an AMD 5x86-133 processor mounted to a
       small circuit board, which supplies the proper CPU voltage and
       allows the CPU's clock to be properly configured.

       For this part, set the Advantage! jumpers as follows:

       Jumper          State        Jumper          State
       1201            ON           1202            1-2
       1203            OFF          1204            OFF
       1205            OFF          1206            2-3
       1207            OFF          1208            2-3
       1209            ON           1210            ON
       1211            OFF          1212            ON
       1213            ON           1301            2-3
       1302            2-3

    NOTES

       Please note the on-screen BIOS message at boot time (as well as
       some third-party diagnostics) may not correctly report the new
       processor. This is normal and often occurs when CPU upgrades are
       installed in any system.

       Benchmarking will reveal that performance has increased and the
       utilities included with the upgrade should provide accurate
       processor information.

       --------------------------------------------------------
       Although the above mentioned components functioned properly in a
       controlled testing environment, AST can make no guarantees of
       suitability or compatibility for any specific configuration. The
       upgrade product mentioned in this bulletin is only used as an
       example of third-party products which are currently available to
       the consumer, and should not be taken as an endorsement of this
       or any particular brand.

       The consumer should verify return policies with any vendor prior
       to upgrade purchase.
       ---------------------------------------------------------

    TAN TPR 16540JB

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