Originally Posted by wee2john
dont know what most that stuff means i am a complete novice - if i put too high a wattage on it would it crash completely??
Actually, as long as the power supply has all the connectors that you need you can go as far overboard as you want without harm. If you need a 500 watt power supply, you could install and use a 1000 watt power supply. Your motherboard and other hardware only draw the power that they need. You just need to make sure that your power suppy is able to supply all the power your computer needs. If the power supply has more than the computer needs no problem.
It looks like you need at about 250 watts according to the calculator. (that I posted a link to)
I would recommend this:Antec Basiq BP430 430W
if you want to keep costs low.
And this: PC Power & Cooling Silencer PPCS500 500W
if you are not worried about the cost.
They are both good power supplies with room for future expansion of your computer.