System fan noise

What really determines the noise of a fan and from what aspects depends the fact it stays on more or less frequently ?

I've two identical Dell E4300 and I've noticed than on one of them the system fan stays on much more frequently.

On a laptop there is a SUNON with following specs:

DC 5V -- 0.21 A
MIN 2.9 CFM

While the other has a FORECON with these specs:

CD 5V -- 0.45 A
MIN 2.8 CFM

thks

 

The first thing that will influence fan noise is the effectiveness of the cooling system, this amount to materials, size and shape as well as the amount of dust present. Those factors will contribute to lower or higher temps of the components which will determine how fast the fan revs.

Different fans can also have different noise levels depending on their geometry. I don't really know a lot about laptop fans, but for desktop fans, there area lot out there with different noise levels and flow rates. You're talking about a rather complicated system.

Also don't forget that there is a fan profile somewhere in your bios as well which determines the thresholds for different fan speeds, given that it's the same system, i'd assume the fan profiles are the same and that the main difference will likely be in the dust present in the system and then in the fans used.

 

Mostly dried bearings, poor manufacturing and in the cheap stuff, plain poor design (i.e. at least not fit for application).

Have a look at this:
Acoustics/Noise from Cooling Fans - Wikibooks, open books for an open world

 

Assuming an identical O/S and software/driver install on both and identical (test) usage patterns...

Does the one that the fan stays on longer have the WD drive?

(Both systems are 'clean' from dust, right?).

 

Could it depends on the hard drive ?

In chich manner the hard disk can influence the usage of the system fan.

However the system with a fan "more active" was that with the hitachi.

 

In a notebook, any component can heat up the whole system which will affect the system fan...

The Hitachi, huh?

Still didn't verify that the usage was controlled/identical in your tests nor have you confirmed that they were identical (hardware) system either (with clean fans/fan blades and exhaust ducts/vents).

 

Both fans are clean and the systems area really "identical".
Only slight different components and a different amount of ram.
Both have xp but with some differences about the versions of the installed drivers.

I'm really undecided, again, on choosing with hard disk to keep for me among hitachi and wd.

 

Not very forthcoming with the details, huh?

The different version drivers, the different RAM setups and (I'm pretty sure different software plus possibly O/S configurations...) makes this too difficult to tell why the fan stays on longer in one of them.

I quit guessing.

Can you give more details? (If not; I would still choose the Hitachi given that both are from the same 'era' and otherwise identical to each other, spec-wise).

 

Both have windows xp just installed.
One has 4 gb of ram (Hynix 2gb + Hynix 2gb) while the other has only one module of ram of 1 gb.
The BIOS settings are identical and on both systems the "SATA section" is set on AHCI.
Also in windows I have set them in the same mode using the "laptop" power scheme.

Are there effectively important aspects to prefer the Hitachi over WD ?

On a laptop the difference of noise among two hard disks could effectively impact on the overall noise of the system ?

Basing your opinio on the cpu fan brands indicated above, which one would Your prefer ?

If it could be useful I can post some photos about the two cpu fans.
They are designed slightly different.

 

Fans? As long as they spin and they're not too noisy - I have no preferance - especially in something so proprietary as a notebook where we don't have too many (if any at all) options.

As for the Hitachi's; in my experience, they are cooler, less noisy and last longer than other drives of the same generation/era while giving the same or (usually) superior performance in Windows based O/S's.


For the rest of your questions: again - too many variables between the machines to know which fan is better (and the system with 4GB RAM is definitely not utilizing it all with XP, while the 1GB system will benefit with more RAM - I would be putting 3GB RAM in both systems...).

 

Check the motherboard revisions and the BIOS version on each notebook. CPU-Z is a good tool:
CPUID - System & hardware benchmark, monitoring, reporting

 

So Do You think that for what about the cpu fan there cannot be concrete differences about the noise and the cooler capacity ?

For what regard the hd... supposed that in terms of performance they are similar, considering primarily operative temperature and noise is the Hitachi (On the average) better than a Western Digital or a Seagate of the same "era" ?

 

Nothing ?

 

Sorry, try re-phrasing your last response - very hard to decipher (for me).

 

i'd like to know of there are or not concrete differences among the two different fans and, about the hd, if the Hitachi is overall better than the WD (Or than a Seagate of the same "era").

Now is the question more clear ?

 

Fans: no comment (I'm sure nobody can contribute anything here...).

HDD Concrete differences:

In my experience: Hitachi HDD's last longer, run cooler and perform (usually) better in Windows than any other HDD I have ever used (RIP Hitachi... bought out by WD in 2011...) this is based on over 500 systems and at least 1000 various HDD's in the past 15 years.

The last Hitachi that I worked on (client's) was a 20GB model that was working daily for over 9 years (in a notebook) until it finally gave up - I do not know of any other HDD that has/can take that kind of use/abuse and last so long.

You keep asking the same question(s) - and I keep giving the same answers: Hitachi drives are much preferred over any other brand (all else being equal: capacity, era and rotational speed) - while fans (in a notebook) are nothing to have a preference to - if one works; ignore it till it doesn't.

Good luck.

 

Really useful.

I'll followYour suggestion keeping the Hitachi.

thks