x850xt problem

[notsosmart]

so i just got this x850xt

i was wondering, how do i tell if my card is dead?

i installed it and connected the power cables and everything, just when i boot i get a bunch of random boxed colors running up and down my monitor.

i hear the fan on the card working and it is putting out a signal; its just that the signal is bad!

should i have uninstalled old drivers from my old card? (x700, catalyst)

any help is appreciated, if worse comes to worse i'll have to RMA it

 

[notsosmart]

anyone??

 

[Green Man]

Does it give you the scrambled display at POST or only after it boots to windows? Does it even boot to windows?

 

[notsosmart]

no it just shows colors all pixelated.. it boots windows i hear the jingle when i turn it on, i just cant see anything