abit ax78 not booting up

[jabran200]

I got new pci-e HD3870 graphic card and tha bit ax78 mobo as well.

Basically i have akasa powermax 1000w power supply.

The graphic car does not seem to boot up as the fan is not spinnnign on it.

i have hooked up the 20 pin in the place where the 24/20pin should be. I also plugged the 4 pin into where the 8 pin should be as well as i don't have an 8 pin.

Now it starts everything lights etc but just a black screen.

any ideas.

 

[jabran200]

thats the one. those connectors they have now are new as they are detachable from the supply. yes the cable is hooked uo to the g-card. I also noticed the hdd and dvd drive do not power up at all yet the case fan and cpu fan do. I hooked up a 350w psu from my other psu wich has a 4 pin and a 20 pin plus I hooked up the graphics card as well and same symtoms no hdd power up or dvd as well??!! could it be the mobo doing that.