This is the trick. You have to create a file and run it all the time, because of this the cpu is working always 100% and the noise disappears. The file you need to create and run is this (with Windows):
it's just a loop. It only repeats what is written in echo function. With this repetitiveness the cpu works always 100%.
wow it works! only problem is CPU is running @ 23% just for that program and fan running constantly, So you have to have it running constantly? That kinda sucks. Tells me it's a CPU problem anyways. aka C3 state. Here' another forum with a potential solution: http://forum.rightmark.org/topic.cgi?id=6:852 This isn't really acceptable in my books. Memo date 2008 lol what a joke! Let's see what DELL says.... http://support.dell.com/support/top...&s=gen&docid=0A7D5CD2E17F5125E0401E0A55176204 My Laptop Makes a High-Pitched Buzzing Noise Journal ID: 10249FR709 Article ID: 295216 Date Published: 6/17/2008 Last Revised: 6/14/2010 » Discussion In certain situations, an intermittent, high-frequency buzzing noise may be heard from the system. It appears to change with processor activity and can increase in frequency if USB devices are attached. This buzzing noise is apparent to some degree on all laptops but is perceived as abnormal because it is different from the other more familiar noises the computer makes. The noise has been isolated to the processorâs power circuit and is only audible when the processor is in C3 (clock-stopped) power state. In this state, the computer is in a low-power mode designed to reduce chassis heat and extend the battery life. The changes to the components in the processor's power circuit are caused by a phenomenon referred to as the Piezoelectric Effect. When a specific voltage is applied to these components, they begin to resonate producing sounds that fall within the range of human hearing (15 â 20 KHz). The noise is normal and within the acoustic specifications of the computer.
Well I tried the fixes and none are acceptable. Looks like the computer will have to be replaced. Here's is a pg for anyone with similar problems in the future: http://cpunoise.shrtl.com/pmwiki.php?n=Main.HomePage
well DELL replaced the system but it didn't make any difference. The noise is still there. It really is pathetic that they let this issue go on in the industry. Intel needs to give up on these low powered states for their chips if they all are going to cause high pitched interference on the motherboards. Oh well, buyer beware. My next laptop will be bought locally from Best Buy so it can be replaced quickly if it turns out to be a dud.
CDN: sorry I didn't re-read the entire thread in details. When pulling the specs on Dell Vostro 3700, it said Featuring up to Intel® CoreTM i7 Quad-Core processors. But it looks like it could be equipped with i3, i5 or i7 chip. Exactly what chip are you using? I have a HP dv8t 1100 which has i7 720QM processor. It didn't have any noise issue. (It does have some other annoying defects but that's another story.)
I was looking at getting the vostro 3700 until i saw this thread. Did you ever get rid of the noise? I like having a 17 inch screen. Also looking at Latitude e6510. Screen is only 15.6 but can get resolution of 1920x1080 v 1600x900 in the 17 inch vostro.