I have a fairly unstable system and I'm wondering if it's the power supply. I've replaced a lot of the other parts (RAM, for example, really helped the stability)

But the reason I ask power supply is because I've got other power supply problems.....like it's always feeding power to the system. Even when it's off (Mouse light and light on my hub are always on)

And since I want a new one.....would 300W help the stability?? Or is it just overkill??