E1705 making whining/chirping noise

I hear the same noise.

My guess is that its related to the power brick, or something with the power unit in the laptop. I see that your GPU run at 1.24V and my guess is the noises will go away if you flash it with 1V. Mine did.

The noise was only present when I was playing a game or running 3D mark.

My PC power supply did this before it cratered. My power supply croaked afterwards. This is similar but sounds like a normal thing. Though I am no expert.

The following is taken from a Mac blog but it is related.

"Sounds to me like capacitor whine... this is a problem endemic to switching power supplies (such as the kind used all over a motherboard, and inverter). This is probably from trying to make the machine too light - they used too small of a capacitor in the power supply, and the voltage ripple, while within electrical specs, makes the capacitors act like speakers (tweeters, specifically).

The solution would be to re-work the boards to add an extra damping cap to certain power busses on the board (that is, if the buses aren't buried in the middle of the board, and they can get to them), and add this to a rev B board.

Processors, themselves, are seldom the direct cause of audible whine - it's the caps that are mechanically resonating with the voltage ripple (but, the processor switching it's current consumption at audio frequencies can induce that voltage ripple -- so, changing the processor's load can change the ripple on the power bus).

The other thing that can happen is (depending on the design in question) when a switching power supply is lightly loaded, it's switching frequency changes, and can reach a frequency that the caps in it resonate with - so, just plugging in a USB memory sick (or some such thing) can change the loading on the power supply enough to kick it out of the resonant frequency. Also, the frequency can change with changing input voltage, so I wouldn't be surprised to see (er, hear) the whine come-and-go with varying battery levels."

Also from the same post:

"This is indeed capacitor whine. I hear it on my Dell machine. However, the cause of the problem is not quite the switching noise. The CPUs have advanced power states that allow the voltage to the CPU to be lowered for a few milliseconds to save power. This is why the "fix" is to stress the CPU enough to prevent it from entering these lowered power states.

The caps bypassing the cpu voltage physically changes its length slightly depending on the voltage expressed across it. WHen the advanced power management changes this voltage, the cap changes its length accordingly. When this happens at the right intervals, acoustic noise is created.

I am going to try putting epoxy or some sort of glue that "holds the cap from vibrating".

So its not that they used cheap caps, but that this new power management scheme was introduced.

To fix it, they would have the place the caps in such a way that these vibrations cancel out - this means whole redesign of MB."

Yea, it's probably the capacitors whining. I have the same issue. When I play games and stress my CPU/GPU much, it demands more power, which will also produce a higher ripplevoltage, which will again cause whining in the capacitors.

Actually I never get it when my computer is in full load...or maybe I just don't hear it at those times?
I get that exact same noise, but only when I'm in a lower power state.
Makes sense I guess...

It's the opposite here...under full load I get an infernal whining...

go buy the 130 watt brick, you'll never put a full load on it

Hi guys, I made a thead about this today, didn't see this one. I was pointed here because my problem seems very similar to all of yours.

I see that this thread is a month old, have any of you found a fix yet?

Here is a link to my thread: http://www.notebookforums.com/post2623619.html

Basically this is what I had to say there:

I believe that the electrical filters Dell put on the MotherBoard are not providing sufficient electronic filtering thus the electrical interference is working it’s way out through the speakers, which happen to be the least filtered component of the system.

I'm going to give it a week and see if I can live with the sound. As I type, the sound is basically inaudible. Maybe in the future I may open up the laptop and disconnect the Sub speaker hopefully cutting off any outlet source for this electronic noise.