PS3 fixed but now a annoying sound

I got the yellow light about a week ago. sent it off to CD24-7 on wednesday got it back on thursday. They also increase the fan speed which is a 'unique mod'. But now whenevaer it is on it has a really loud sound, not a bad sound, you can just here the fan spinning constantly.

Sounds like they didn't add new thermal compound to the heatsinks and now the fan is doing more work. phoonbaba098

When you speed up a quiet fan, you will hear it. Like when you're in a car, and the car goes faster, you can hear the motor get a bit louder. Speeding up the fan too much will shorten it's life.