RAM-testing - odd errors

[rkauer]

@Iznougoud:

 Did you check the power supply and ventilation on the 040?

 Random lockups are common with bad power supplies (due ripple) and when the 040 goes too hot.

 Even if you don't have a oscilloscope, you can check the ripple on the +5V line using a humble digital multimeter (simply put it on the smallest AC scale and read the LCD). Acceptable "noise" is in the 50mV tops!

[rkauer]

Iznougoud wrote:

--zip--

I am however a bit confused by the output given by MemTest..

 Ripple can cause the symptoms you are experienced. Alas anything sourced from the +5V line can suffer. Sensitive devices first (memory, CPU, SCSI and IDE controllers...).