Power prob with upgrade

[c61ll]

Just repalced my asus a8n sli athalon xp 4800x2 and 1gb ram with a bfg nforce680i c2d 6750 and 2gb of crucial ballistix, upon boot it says there is insufficient power to my video cards 2 7800gtx's, im using an enermax liberty 620w

any ideas?

 

[helmutcheese]

Check connections to cards, if adapters try use PSU leads instead and dont have both cards on same Rail.

 

[c61ll]

sorted the power out now need to get sound working installed drivers but nothin comin from speakers

 

[helmutcheese]

Onboard or pci card ?, if later disable onboard in bios.

 

[c61ll]

just using the onboard