Then u can try your card on another computer, if it's fine then u might want to upgrade your PSU with better one...
(did u connect all of the power cable for your card?)
Yup . i have 1 PCI-e and on 2 @ 4 pin molex to PCi-e connector which comes with this card connected to card.
And i have another PC but its PSU is a Cheapo one
and also if i have to buy new one i have a selected these two PSU's
kindly tell me which one is better for me.