Can someone help me get a new MotherBoard I have a good enough GPU

What's your budget, what's your case size (ATX, mircoATX), and do you have a decent enough PSU?

If you're on a tight budget you should look at this combo. Just add some DDR2 RAM and you'll be good to go

http://www.newegg.com/Product/ComboDealDetails.aspx?Ite...

Are you looking for AMD or Intel dual/quad core??
Do you have thoughts of xfire in the future?
What size board does the case support?

How do i find out what size it is? the case says HP Pavilion533W
and intel dual/quadcore sound good

megaman if i buy that can my new video card fit in it??

And.. is this mother board way better then my old one?"

Old MotherBoard http://www.fic.com.tw/product/motherboard/AMD/K8MC51G.a...

mATX it is then. I'm surprised that the PSU in that system is running fine with an Athlon 64 and a 4850. Yeah, that combo I sent you fit just fine. Thing is, running with that factory PSU is a little scary. Perhaps you are better off with something that generates less heat and uses less power like

AMD Athlon 64 X2 5400 Brisbane BE $58.99
http://www.newegg.com/Product/Product.aspx?Item=N82E168...

and pair it with this board

ASRock A780GMH $71.99
http://www.newegg.com/Product/Product.aspx?Item=N82E168...

If the PSU inside your computer is at least 450W then you should be O.k with the Kuma combo I listed earlier. If not then perhaps using the 5400 BE would be a little better.

What's your budget? The combo suggested by megamanx00 is a decent price, but a low/midrange budget combo.

Any newer board out there now will support your video card. Your video card uses a pcie slot. You will be hard pressed to find a newer board that doesn't have one.

Your concern should be more with your power supply. Does it have the 4/8 pin cpu power connector? If not, you'll also have to get a new power supply.

How do i check my power supply?..
And i ccan get anything within 100-200 cause my mom is buying it for me  
and thanks for everything megaman

Look at all the connectors coming from the PSU. Is there one that has 4 pins or 8 pins that plugs in right next to the cpu?

The recommendation would depend on the psu then. If you need a new psu, go with megamans' suggestion. If you don't need one, I think you can get a better board/cpu.