^^It may help in the long run for the whole PC. I am from India and I know what some local brands are like here. If you hear Zebronic, IBall, Frontech, be alarmed. They are ticking time bombs. Mostly people here don't realize how important a PSU is.
Here the PC dealer is god. If he tells someone (who knows little about PC's... they can sniff out people who are knowledgeable and who are not!!!
) that this is great! The customer would buy it without any checking or reading. And online shops are not predominant here.
I am not suggesting the change in PSU looking at the temp, but by looking at the brand.
@OP: If you are looking at an upgrade in the near future to the HD5770, then i suggest a Corsair VX450W. Would hold out cards till GTX460 1GB easy.