Changed HDD - Noisy

[RandomMacBob]

I bought a MBP13 with a 250 GB. I noticed that the HD is a Seagate 250 GB 5400 rpm. So i thought I would upgrade it to a Seagate 500 Gb 5400 rpm(Momentus). Now the noise is noticeable. Not much, but you can hear it.

Should a 500GB harddisk be more noisy than a 250 Gb? I thought it would be the same. The only difference I saw between the two harddisk is that the old HD had a Apple logo on it. Otherwise its the same brand and model, just with a higher capacity.

If I had upgraded at apple would I have been rid of the noise or is this just something that follows along with the higher capacity?

 

[devilstrider]

Did you install it right? Did you put the mounting screws from the old one on the new one?

 

[RandomMacBob]

Yes.

Actually, first I bought a Scorpio Black 7200 rpm which was too loud. Then I switched back to the 250 GB default installed one, and it was quiet again. Today I received the 500 Gb momentus with 5400 rpm.
It is not as loud as the Scorpio but it makes more noise than the default that was installed.

If I place my hand under the directions keys the noise is smaller.

The noise is very little. Just a very small fan/humming sound. But the default installed one, the noise was non existent(had to put ear down to hear it).