Latitude E6400 Owner's Lounge, Part 2

Any idea how to test that?

FWIW, I did some testing, and found that no matter what I tried as long as my wireless connection was connected it always prefered that connection, and I was getting about 16mbps through it (tested using a few large file transfers + stopwatch) no matter what I had the wired connection set to.

If I disabled the wireless connection I got 7.9mbps when it was set to auto and showing 10mpbs (which is _really_ fast for a 10mpbs connection), and if I manually set it to 1Gbps full duples I got 279mbps (seems reasonable, probably limited by the drives involved especially since they were connected to the machine via usb).

The connection _appears_ to be stable when manually set to 1Gbps, didn't have any file transfers drop and am typing this and using that machine through RDP, so I'd know right away if it did drop.

 

To all e6400 owners:
can you hear a powerful buzz from the psu?
when the room is silent?
or when you place it close tot he ear in a noisy room?

i can hear mine in a very silent room from 3 meters or yards

maybe it has something to do with the fact that over here the plugs are 220V ?

 

PSUs should be inaudible. You have got one where something inside is not fixed securely and is vibrating. It should still be under warranty so ask Dell to replace it (you can argue that the noise may indicate that it may die). The mains voltage is not an issue.

John

 

+1. Mine is barely audible apart from fan noise, that too only when on high speed.

 

john in normal office conditions you might not be able to hear it
but what about a silent room?

its a different sound when the computer is in stand-buy , different when it is on, different when its not connected to the computer, only to the ac plug

 

and to be clear im talking about the black sim brick between the 2 cords connecting the computer and the plug

 

Ok I had a look to my friend Dell laptop PSU (which is not the slim line), and my E6400, and under a very quiet room, when the computer is at sleep, they both produce a electric like sound. I think this is normal for laptop PSU's, as they are made such small, and need to produce minimal amount of heat as it's in an enclosed area.

 

I have a little bit of electrical noise from my E6400 (I think it's largely from the SSD), but nothing audible from the power brick (admittedly behind my desk). On the plus side, it's less than the switching noise from my ThinkPad, and way less than what I had on my D830.

 

Sometimes I am working in a quiet room where I can here the CPU fan, even on slow speed, but I have never heard any noise from any of the Dell PSUs in my collection. I've just put my ear against my current PSU (a 90W slim unit) and it is quiet.

John

 

then mine is faulty
and never mind that it could die, it could cause a fire