That PSU sounds fine to me... I actually don't even have a board that has four memory slots in it, but from the looks of it a few other people here do.
I've heard reports that running memory in unganged mode can help solve these problems that pop up when using four modules. Ganged/unganged mode has to do with how the memory will talk to the memory controller. In ganged mode, both channels are synchronized and data travels from the memory to the CPU in a big block. In unganged mode, each channel is free to operate independently of the other, so it makes sense that would lessen the restrictions on the system, and could improve stability.
A 4GB module isn't that big these days, so I can't imagine that the CPU or motherboard wouldn't have support for it... probably one of those problems that pops up only when just the right(or wrong) things all come together.
Do not meddle in the affairs of archers, for they are subtle and quick to anger.
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