What are the wifi and throtting problem of L521X indeed?

Any post with details? I just got my L521X, I don't quite understand the problems that people here are talking about. The wifi is working, but do you mean the signal is weak?
For throtting, does it mean people hear fan noises? I don't have such problem? How to produce that?

 

Indeed the signal IS weak, you have to be really close to the router to get good transfer rates.
Regarding the throttling, no really sure, I got mine a few days ago as well.

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What is the symptom of 'throtting'?

 

Unless you're using an app (read:game, mostly) that uses both the CPU and the NVidia GPU to a large enough and balanced extent that both heat up you won't run into it.

The short version description is that once they heat up to a point, the BIOS starts keeping the CPU at 1.2 Ghz, which usually for the application in question really kills the "feel" of the app.

BIOS A06 changes the balance to pull down the NVidia GPU first/more, and tries for a better balance. Anecdotally, it seems to have worked for most.

It is possible, depending upon external environment, to get the behavior with lighter-weight apps (e.g. using the machine on a beach in the tropics, ha ha ha) but it is not as likely.

The WiFi problem hasn't been "fessed up to" but the primary symptoms are the combination of less-signal-strength and lower-data-rates between notebook and WAP. There's no clear way to mitigate the issue yet short of pulling the wifi antennas outside the machine, lots of conflicting anecdotal data.

 

Did we really need a new thread on this? The Owners Lounge and the Wifi thread offer more information than you'll get here.

 

For a new-comer, both those threads are a *LOT* to chunk through.

Maybe finish summarizing the current situation but lock this thread from further postings? Is that possible?

 

Enjoy your new notebook. If you like its quality and performance, why wonder?

 

I agree, enjoy!

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Thanks. The lounge post must have many information, but too many. How can I quickly find the post I need?
Yesterday I installed Diablo3 and I started to understand more. The fan makes noise when I start the game. Is that so-called 'throtting'?
That also happened when I was updating my BIOS.

 

For wifi, it is weak, at least weaker than my previous E6500's 5300. I am thinking of pulling the 5300 to this new machine. Can that be possible?

 

No its not...You may not notice throttling in that game as many have had success with it. Throttling will occur when things get heated in a game and in order to keep the CPU or GPU in check, it makes itself slower to output less heat causing your game to slow down for a bit. It's not really as bad as it seems.

Also, please ask these kinds of questions in the large Owners thread so more people can chime in.

 

It's not about the WiFi card or its driver. It's a failure of the system design, or as some put it, "systemic defect." It has something to do with the all-aluminum lid, the placing of the antennas, the insulation of the antennas, the interference of certain system components on the WiFi card and/or the antennas... Nobody knows for sure at this point, including Dell engineers.

(Why spend that much money on a premium notebook and have to find ways to "fix" it yourself within days of ownership? Do you do that with your brand-new car?)

 

I like it and I wanna make it better. That's all.

 

Throttling is where the system runs the CPU or GPU under the rated frequency because of overheating. You wouldn't notice it , other than that performance is worse than it should be, without running monitoring software like HWINFO64.

Under A04 it throttles the CPU to 1.2Ghz after about 2 minutes when the GPU is in use.
Under A06 it throttles the GPU up and down between 200 and 700 mhz when the GPU is in use and the framerates fluctuate wildly.

Note that this is only for the quad-core, Geforce 640M model. I don't think the dual-core version has this issue. You can mitigate this issue by running games at lower detail settings and resolutions so that it's less obvious.

Wi-Fi signal is just weak, but it's probably actually a problem with interference but no one has managed to narrow it down yet. Dell has apparently found the cause but doesn't have a solution yet.