Upgrading/replacing my graphic/video card

We need lots more information...

What cpu and motherboard do you have?

What is your monitors resolution?

What power supply?

What is your budget?

I figured you needed more information  , thanks in advance though.
for CPU it show I have: intel(R) CORE(TM) 2 Quad Q8200 @ 2.33 GHz 2.34 Ghz
I have 4gb of ram.
What doe you mean with monitors resolution?

http://guzilla.com/images/P/843591006880.jpg
This is my watt if Im correct

My budget is around 200-300 Euro. Im keeping this flexible as I have no idea how much its gonna cost me  

you can get a very nice card with that budget, a 6950 or a 560 ti.

both of which will fulfill your needs.

but the best card for your needs right now would be a 6870 which will be a lot cheaper for somewhat less performance.

Could u give me some links to these cards
Because I this much that there are 2 different sort of cards? Nvidia and AMD.
Ye im horrible when it comes to computers  

I have no idea about European websites that you'd be able to purchase the card.

AMD and nvidia are 2 companies that design the cards and then they are sold by other companies. Either one should be good for what you need.

Monitor resolution examples. All monitors have a native resolution.

1280x1024
1400x900
1680x1050
1920x1080 (1080p)

AMD HD6950 1GB or Nvidia GTX560ti 1GB would be good choices but will probably be slowed because of your low cpu speed. You should try to overclock that cpu to 3ghz if you want to see the full potential of those video cards.

Overclocking will make it work harder right? So that also means I'd have to get more ventilators in for the heat they create. I prob will, but need a miracle to get so far on my own