PowerStacker 5x86 BIOS Configurations

You may need to change some of the BIOS setup options if the PowerStacker is not operating properly.  In most cases, you can access the BIOS setup options by holding the "Delete" key during the POST (Power On Self-Test). Refer to your computer manual for further details.

Advanced Chip set Options:

Step 1
- Locate the "AT Bus Clock Selection" (may be called AT Bus Clock Source). The settings should be as follows:

  • CLK/3 for a original machine SX/DX 16, 20, 25 or SX2/DX2 50
  • CLK/4 for a original machine SX/DX 33 or SX2/DX2 66

Step 2 - Locate the Memory Read Wait State (or DRAM Wait State). You should have options of two or three different settings for the Wait State (or W/S).  Experiment with the different settings other than the default to find one that works for your system.

Step 3 - Locate the Cache Wait State.  If your bus speed is higher than 33 MHz, the Wait State should be set to 1.  Otherwise, set the W/S to 0.

Step 4 - Locate the System Boot-up Speed Setting.  High is recommended, but if you have recurring boot problems, you may want to change the System Boot-up Speed to Low.

Advanced CMOS Setup Options:

Step 1- Locate the Internal Cache settings in the Advanced CMOS Setup.  This setting should be enabled.  Some CMOS setups have two Internal Cache settings, so be sure that both are enabled.

Step 2 - Locate the "Numeric Processor Test" setting in the Advanced CMOS Setup.

This setting should be enabled. If it is disabled, the floating-point unit is not recognized and will significantly decrease the overall system performance.

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Louis F. Ohland, Peter H. Wendt, David L. Beem, William R. Walsh, Tatsuo Sunagawa, Tomáš Slavotínek, Jim Shorney, Tim N. Clarke, Kevin Bowling, and many others.

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Last update: 08 May 2024 - Changelog | About | Legal & Contact