[Raudi]

haha still confused will a PSU have a fan? and knowing that I need the least amount of power what am I looknig at in terms of needed watt. and If Its cheaper without a case I was thinking of just leaving it without but I've never brought a case for these boards or anything. Thanks for helping I will do some research before I ask anything else.

If I type Biostar J1800NH2 xbmc into google I dont get any links but if I type Gigabyte J1800N-D2H I get lots.
Also will this do for Ram?
http://www.ebay.co.uk/itm/2-GB-2x-1GB-PC...1c40265a0a

Also if a power supply says 70watts is that how much its doing. like the board says it uses 10 watts so if I got a power supply rated 70 watts. wheres the rest of the 60 watts. excuse me for sounding dumb.

Most traditional PSUs have a fan. A pico PSU or similar like the one built into my case are completely fanless, since they only supply such a low amount of energy. They also require an external part which takes the AC current and transforms it to DC, like the ones for laptops, or some computer monitors etc.
The 10 Watt only refers to the TDP and doesn't equal the power intake of the processor alone. In idle, you should be able to go below 10W, but under load you should calculate with much more. And it doesn't hurt to have reserves for a harddrive or two.