My brother has an old motherboard with a 66 MHz bus. The motherboard has 1 DIMM and 4 SIMM slots. The manual states that the DIMM can hold max. 128MB.
When we put a SDRAM DIMM module in the DIMM-slot each time the motherboard only detects the capacity of the memory module divided by 4. We've tried the following:
256MB SDRAM 133 MHz -> 64 MB detected
128MB SDRAM 133 MHz -> 32 MB detected
128MB SDRAM 66 MHz -> 32 MB detected
Is there anyone who can explain why only a quarter of the capacity of the chips is detected. The frequency of the memory module doesn't seem to solve the problem.