• DALLAS RTC coin cell empty

The motherboard's Real-Time Clock (RTC) chip contains a coin cell that may have drained, causing the loss of CMOS settings. This can result in an inability to save settings, causing system instability or failure to boot. To fix this, the RTC chip can be replaced with an equivalent or repaired by cutting into it and soldering on a new external coin cell holder. Replacement guides are available at https://github.com/necroware/nwX287 or https://github.com/necroware/nw12887, depending on the actual chip used.

• Underpowered VRM

The onboard VRM may not provide sufficient power for certain processors or configurations.

Some variants uses Async cache in DIP sockets, others use soldered Pipeline Burst cache

Some additional known issues:

• Multiplier selection with Pentium MMX CPUs may not work correctly due to a design issue. For example, a 3X multiplier for 200MHz Pentium MMX CPUs can not be set and it will be stuck at 2.5X/166MHz. The board is missing a 2.2Kohm pull-up resistor on the BF0 CPU pin needed for this to work correctly with MMX CPUs. Classic Pentium CPUs will not have multiplier selection issues.
• This board does not appear to be compatible with Dallas DS12887/DS12887A RTC modules and will consistently report CMOS checksum failures when one is used. The Benchmarq BQ3287 and Odin OEC12C887 both appear to work fine. Necroware's BQ3285 based custom RTC module is confirmed to work fine in this board.