I work in a server room all day, so when I come home I really don't notice the noise of the fans on the dual 1.8 I have in my Digital Audio... but I would warn you that the upgrade over-heats easily because it's a dual 1.4ghz overclocked to 1.8ghz. If you're like me you've got a lot of internal drives. I had to buy another fan to hack the poor airflow in my case.