strange noises from my Windows 7 computer

Dell Inspiron 1464 notebook
February 23, 2010 at 13:21:26
Specs: Windows 7
hi people.. bit confused.. noticed a few days ago while on my computer.. when i put my cpu under load i can hear the cpu fan ever so slightly slow down.. it does it when i move the mouse too.. ok so i have 3 fans installed by myself inside the machine.. its a dell dimension 3100 running 64x windows 7 ultimate i have 2 gb ram.. capable of 4... 2 - 160gb sata hdd`s..a crappy pci vidoe card with 64 mb ram (hard to find a pci card thatll support windows 7 aero... anyways enough babbling haha.. just wondered it its the psu thats on its way out... i since swapped my old intel celeron 2.8 ghz for a p4 hyper threading 3.2... and thats about it really... my fans are located one just after the heat sink so it actually has 2 on it.. and 2 on the back as exhaust fans blowing out.. the only modification i have done is to the stock cpu fan.. i installed a switch that makes it shoot upto 8000rpm when things get to hot lol.. only used it 2 times.. and its like a wind tunnel in there lol...

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February 23, 2010 at 17:41:51
I am not sure I understand the question. Are you just hearing the fans speed up and slow down under different loads? That isn't that unusual especially with aftermarket fans. Or is it some sort of other noise? Are you having any issues when powering on or off? May be worth it to blow the dust out of it, if it has been a while.


I want to go like my grandfather did. Peacefully in his sleep. Not screaming at the top of my lungs like the passengers in his car.


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February 23, 2010 at 20:06:56
If you are hearing fan slowing down under load to the cpu, then you might be overtaxing your power supply, or the bus to that part of your mb.

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February 24, 2010 at 13:28:54
this is to likely story, i`ll put it simple....when ever i do anything on my pc.. ie;.. move the mouse... close apps... i can hear the fans (all of them) slowing down for a brief second untill i stop doing anything.. i aint got a clue how much wattage my psu is pumping out.. theres no label on it :/ .. so yeeah just thought it could have been related.. only started doing it after i put the different cpu in.. and even then it wasnt as noticable... cheers for the help people :)

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February 24, 2010 at 21:47:33
It sounds like it. I'll bet that if we look up the spec's your P4 is pulling nearly twice the wattage the celeron was, add the extra fans, and the stock power supply might be overtaxed (you may have 240Watts or less). If you are considering upgrading your video card, replace the power supply first, depending on the card, 400Watts should be enough. Check your potential video card's spec's for wattage, as well as making sure that the PS includes enough of all of the plugs you will need (ie: you may need one floppy plug, a 4pin MB plug, two SATA plugs, and a 6pin video plug, but some may not have exactly what you need).

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February 25, 2010 at 13:06:13
woo-hoo!!! just ordered a new psu with 450 watts.. all the same fitments as the one i cutrrently have,..... now.. my next question is... i have 2gb of 533mhz memory in my pc.. i read somewhere that if you have a processor that has 800 mhz fsb then you can match the memory to the same speed....

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February 25, 2010 at 21:16:51
I do not know if your motherboard supports 800 MHZ memory, I actually doubt it. But your 533mhz memory is probably running at 400 mhz (DDR2 2x200mhz actually) which is fine since your P4 800mhz is probably at 200mhz with 4x multiplier (notice the same base '200mhz' which is the same which is your target).

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