[Solved] [URGENT]gtx 260 dead?? or motherboard slot??

here is my comp spec that I upgraded :

msi n260gtx-t20896-ocv3
phenom II x2 550
gigabyte GA-MA770T-UD3P
coolmax cu-700b 700w
Elpida 4x1gb ddr3

i also have a lite-on cd rw and sata 400gb hard drive that i am sure it has no problem since was using them before.

ok here is my story.
first of all, I didn't not buy that 700w power supply. and I use my old coolmax 450w instead. however, i got everything,built and it works perfectly fine at that time. I even installed window xp and drivers with the 450w.

after that, I was going to finish up everything and plug in all the usb stuff.
then it doesn't work.

I wasn't able to power it up. So i think that is because of the lack of power from the power supply. so I bought the 700w from newegg.

now i got the power supply, fortunately, i am able to power it up every time. all the fans are moving. But there is nothing showing on my monitor.
I also noticed that there is a sticky smell coming out from the video card. and the fan of the video card were kind of unstable, its like running fast->low->fast->low~~ P.S. i did plug in all the 6pin connectors.

so i stopped it... and now I am not sure what is the problem with it....
is it the motherboard pci-e slot problem? or the video card problem??
HELP PLZ >.<

I agree, seems like the video card.