I take it you are using PC133 CL2 memory... most of the single stick
PC133 CL2 memory modules are very unstable in the i815E motherboards.
The problem is the memory chips are just too slow and when stacked
in parallel they tend to slow each other down. For some reason TWO
separate sticks of PC133 CL2 memory have had better success in the i815E
mobos.
If you need more memory than 256MB then you will want to use PC100 CL2
memory modules to insure a stable system.
Hans
What is the speed and FSB of your processor?
Hans