I need help...

Yes - a single nvidia card will work on an ATI MOBO (assuming you have a PCI-e slot)- you just will not be able to use Xfire or SLI to install a second card (Nvidia cards use SLI where ATI MOBOs support Xfire and they do not work with each other).

One more thing to keep in mind is does your system have a good enough Powersupply to run the new video card (many pre-built system s only have 300W PSUs so you would need a new Powersupply as well !

You need two things
1) a pci express x16 slot
2) a strong enough power supply with a 6 pin pcie power connector

The brand of the card shouldn't matter but you might not have enough power to run a 9800gt. You might consider a card that doesn't require an extra power connection like the ati 4650 or 4670 or the nvidia GT 240.

Expansion Slots Total (Free) -1 ( 0 ) x Processor - Socket AM2+ , 4 ( 0 ) x Memory - DIMM 240-pin , 3 ( 3 ) x PCI Express x1 , 1 ( 1 ) x PCI Express x16 ,I got this off the cnet reviews on my pc lol because i dont know much about pc's but does this mean i have what your talking about?

That be the right slot, so how about the PSU?

I can get the powersupply later right?,It wont affect the install? i have 300watt right now

whats a psu?

The power supply unit located within the computer case.

Umm i think its just 300watt...  

You might do well to replace it then, a good quality 450w or 500w wood suffice.

Ok cool,Thank you so much  

Best answer selected by Blondi.

IF the Powersupply does not have enough power to run the new video card then the system will either be unstable (if it is close but not enough under heavy usage) or not run at all (if it is way underpowered) - Worst case would be that it has enough to run for awhile but winds up burning out while running a game (as the power spike from it dying could also damage the new video card or the MOBO or CPU or other parts of the hardware ! - So you'll want to upgrade the powersupply either before the new video card or at the same time !!

The power specifications for the 9800GT call for a minimum of a 400W powersupply so trying to run it on a 300W system would be asking for problems.

Ok i will keep that in mind and go get that powersupply before i have someone put the graphics card in for me,I dont want to hurt my pc lol.Thank you.

This topic has been closed by Mousemonkey