Yoga 2 13 still loud as hell -- why this is a failure

I never wanted to write this post, but it's very hard at this point not to say that the Yoga 2 13 is a failure.
The third generation is now available with the Yoga 3 Pro and Yoga 3 14 and somehow, the Yoga 2 13 is fallen in a black hole where nobody inside the company is listening or caring about the congenital problems of this -- ironically -- highly succesful convertible laptop.
Yep, according to Lenovo is "AMERICA'S BEST SELLING CONVERTIBLE 2-IN-1 PC*"
*The NPD Group, Inc. Retail Tracking Service, Convertible Tablet PC Form, Units and Dollars, Jan - Aug 2014.
Not many knows, but the Yoga 2 13 is the cheap brother (or non-Ultrabook version) of the Yoga 2 Pro. The main differences are in the lower res display (1600p vs 1080p), a thicker plastic chassis prone to flex (the Pro has a much sturdier alloy base structure) and a simplified cooling system, with a single fan with two ventilation ports for intake and outtake placed side by side on the back of the laptop.
I don't know if it's caused by this unhappy fan configuration but there's a critical flaw in the Yoga 2 13. It's loud. Most of time. For no reasons at all.
This is not a problem of a batch or some unfortunate samples, it's just how the laptop behave and there are hundreds of posts in the Lenovo message board with basically every Yoga 2 13 user talking about the same behaviour. The thermal management basically overreact to CPU temperatures (U-series Haswell, Ultrabook class), driving frequents and exagerated bumps in fan speed and consequently loud noise. Browsing, listening to music, reading an e-book or even just idling (!!) often leads to irrational bumps in fan speed, without any process sucking more than necessary (antivirus, broken apps, background processes and updates are not the problem).
Now that the third generation is out I've lost fate to see a patch fixing this problem, which by the way, seems to be quite common in all the Yoga family of the brand.
This is not the ONLY problem of the laptop, but it's definitely the most annoying. I can live with the excessive flexing of the base and on the center of the keyboard, with the Wi-Fi drops, the so-so audio and touchpad, and mostly because the clever hinge design compensate for all of that. But when my almost-Ultrabook laptop with an Haswell-U CPU is louder than my desktop workstation, it makes me feel like this laptop is the worst 850 Euros I ever spent in my life.
Lenovo, you can still fix this.

hi Biscot,
Welcome to the Forums.
I recommend you stop using that specific USB 3.0 port and contact lenovo support ASAP for service. An investivation was done with this issue and a service tip has been released to fix it.
Links:
Re: Power chord plugged into usb and shorted
Support phone list
Regards

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Yoga 2 13 still loud as hell -- why this is a failure

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