Changing of video card

Previously I was using GTS260, man, it's churning out hot air at approx 70 celcius as soon as windows has finished booting.

When I was folding, the temperature could go up to 80 celcius. I tried once to let it fold through the day when I went for a trip, when I reached home at night, the whole room feels like an oven! Even hotter than the day.

Now I have switched to GT430, the temperature is only at 43 celcius. Much more comfortable.

Not sure if I should continue to use Windows Vista or should I switch to Windows 7?