Would a 5870 or 5850 fix in the master slot on this mb?

Yes, the long orange and green ones are PCI-E 16x slots, it will work fine in there. I would check the motherboard manual to make sure that the orange one is the one with 16x as one is 16x and one is 8x on that board.

i mean mainly length wise and width

it's a antec 300 and the psu is at the bottom 1 hard drive and 1 cd drive

yay or nay

anyone know if a 5850 would fit in a antec 300 case

i'm really looking at this one
http://www.newegg.com/Product/Product.aspx?Item=N82E168...

or maybe

http://www.newegg.com/Product/Product.aspx?Item=N82E168...

does anyone know if there's a difference on the cooling or anything like that?

I know I don't care about the factory oc'd with sticker stuff but i'm not going to oc later so if i get one that has a small oc it wont void my warranty and i pay what another 30 bucks for a few more fps?

sounds good where do i go to figure out how to oc the card without screwing it up, i dont oc my 3.4 phenom II just because I dont trust myself lol....

thanks guys

Best answer selected by cmaki2008.