Its the extreme power series. It may be enough to power your card. But i suggest you change it. It has countless issues and its reliability is next to zero. Hard to believe that such a PSU came out in the market from such a reputed manufacturer! People have complained that it has blown up in their face many times. Not only this forum but in other forums where i hang out. Probably not the best PSU choice. Cooler Master Real Power and Silent Power are better options.
The problem is not with the power! But its with the reliability. Its can run GTS250, HD4850, HD4770 and cards within that range. But its prone to blow. You might have spent 3000 INR on that card, but it may end up causing 15000 INR worth of damage before it blows up!
Why not get the video card you want and consider the cost of the PSU as part of the upgrade?
Yes, I know - money. But how much money will you save if you POS Cooler Master fails and fries something expensive.
As for what brands are good ....forget brands. It's the various lines within a brand that determine quality. You will want to pick from the 1st 3 groupings below if you are using twin GFX cards and OC'ing more than 25-30%.