I have a Dell Dimension 8100 and the case fan is making too much noise and I want to replace it. Here are the specs on the fan that is currently in it:
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Dell P/N: 6985R
DATECH
0925-12HBTA
DC 12V 0.60A
P/N: 83581
DC Brushless Fan
3 pin
7 blade
3.75" x 3.75"
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My specific question is regarding the amperage. The current unit is a 0.60A unit. Do I have to replace the fan with a unit that has the same amperage spec? I assume that a lower amperage would provide a fan that runs at a slower speed, which I do not think that I would want. Can anyone help clarify this for me?
I assume that a lower amperage would provide a fan that runs at a slower speed, which I do not think that I would want. Can anyone help clarify this for me?
Thanks
You could well be excused for assuming that a fan with with a higher power consumption (voltage x the current = the power in Watts) but it isn't always the case, as you appear to hit on it's the air flow that is important.
I guess you needn't worry unduly because all the fans of a given size more or less draws nearly the same amount of current... give and take about 30MA or 0.03 Ampere or so, obviously a fan that requires about 0.12A or more would make me think twice, there is one negative side and that is the faster it goes the noisier they get.
You need be more concerned with the direction of airflow, on some fans not all there are two arrows somewhere along the sides of the fan indication direction and clockwise rotation.
The double bearing fans are superior and longer lasting than many of the 'El cheapos' which just uses brass bearings sleeve.
I have a Dell Dimension 8100 and the case fan is making too much noise and I want to replace it. Here are the specs on the fan that is currently in it:
////////////////////////
Dell P/N: 6985R
DATECH
0925-12HBTA
DC 12V 0.60A
P/N: 83581
DC Brushless Fan
3 pin
7 blade
3.75" x 3.75"
////////////////////////
My specific question is regarding the amperage. The current unit is a 0.60A unit. Do I have to replace the fan with a unit that has the same amperage spec? I assume that a lower amperage would provide a fan that runs at a slower speed, which I do not think that I would want. Can anyone help clarify this for me?
Thanks
I too need a help that my pc is making a lot of noise while booting.What should I do.
Sometimes I get a loud noise. A friend thinks a fan is going out. If I turn PC off and back on, the noise is gone. Looking thru holes in metal plate forming the back of the tower, I see two fans running:
1. Fan at top, up against the back plate with no id info visible.
2. Below that, still in upper half of back of the PC, a little further into the PC going horizontally, I see another fan with this info on it:
SensFlow
DC Brushless
EFC0912BF
Dell P/N 4W022
DC 12 V 0.70 A (Rated 0.60A)
Delta Electronics Made in Thailand
Which is the case fan and which the CPU fan...are there other kinds? I'd like to know more before taking the cover off. From Dell documentation that doesn't look as easy as I thought it would be on the 8300.
Sometimes I get a loud noise. A friend thinks a fan is going out. If I turn PC off and back on, the noise is gone. Looking thru holes in metal plate forming the back of the tower, I see two fans running:
1. Fan at top, up against the back plate with no id info visible.
2. Below that, still in upper half of back of the PC, a little further into the PC going horizontally, I see another fan with this info on it:
SensFlow
DC Brushless
EFC0912BF
Dell P/N 4W022
DC 12 V 0.70 A (Rated 0.60A)
Delta Electronics Made in Thailand
Which is the case fan and which the CPU fan...are there other kinds? I'd like to know more before taking the cover off. From Dell documentation that doesn't look as easy as I thought it would be on the 8300.
Sorry...now I think that the upper component I see thru the back of the tower is the power supply. I think I'll wait until the noise happens again before taking the cover off because I can't run the PC with the cover off in the position that Dell describes for removing the cover. When the noise happens again, I'll see if the one fan is turning. That will tell me to replace the fan or look for other causes of the noise.
Ya wanna find where the noise is coming from... play doctor get a lengthy bit of plastic tubing, think you know what I'm about to suggest... place one end against the ear and prod about with the other end keeping well away from fan blades..
...it's a trick I used to play in the good ol' days of VHS and Betamax video recorders, used it on tape casstte recorders as well when they all developed strange mechanical noises - you can tell I used to end em or mend them
The local barman should have heaps of the stuff they dangle in beer barrels, I glued a small funnel on mine so it fitted over my ears.
0.6 amps thats 600ma, anything up to about 0.8A will be fine... you can't really say the more current it takes the faster it goes, the more current it takes the more torque or pulling power it has... if you want to convert that to watts its like shelling peas.... V x I = Watts so 12V times 0.6 equals a grand total of 7.2 Watts.
What is important is the direction of air flow, not all fans but many have 2 arrows printed somewhere on the casing indicating direction (blow in or out) and rotation (suck or blow).
wouldn't like the noise be the hard drive... if it is better backing up any important files, you can power up with the hard drive disconnected and see of there's a difference - no harm doing that. This could apply to rtginc as well.
Fans can make strange noises when they start from a standstill when the bearing become dry or worn, or clogged with dust for that matter, always best getting double bearing types, it's not as much as the current they take but the amount of air they can shift.
Help replace my fan 
get a lengthy bit of plastic tubing, think you know what I'm about to suggest... place one end against the ear and prod about with the other end keeping well away from fan blades.. 
Linear Mode
