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11 Posts

11-28-2014

United States

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Re: Miix 2 11 (and similar) CPU Throttle "Mystery" Solved

2015-02-23, 20:33 PM

So I just got several emails regarding this thread and for some reason, I can't login nor reset my password (I'm the OP of this thread). Trying to reset my password said my ID is not valid but I'm using the email that sent me the Welcome to Lenovo community and in fact, I recieved tons of notification re this thread so I was baffled how I "lost" my login credentials. I just re-registerd using the same email again. Anyway, I owe this community an update:

 

First of all, after posting the OP dated Dec. 10, 2014, I got too busy and completely forgot about this. When Christmas came, we all opened our gifts, and of course, my kids were happy and suprised about their gifts. So like anyone else excited with their new "toy", my kids started to use these devices.

 

Later on, both of them started coming back to me, complaining about random stutter, lag about some processing, and a couple of freezes. Looks like my quick test never revealed the problems with this devices. The longer you "actually" use it, in real scenarios, the more the problems persists and more noticeable.

 

So I spent my whole evening of the 25th just trying to figure things out and eventually, I knew this product has a problem. Yes, setting Power Options helps, but not 100% fix for everything. The system will bog down eventually.

 

So I did the most sensible thing: returned the two products back to NewEgg on Dec. 26th and purchased two Acer Switch 11 Core i3 from Microsoft Store (free shipping / free returns). To this day, the new Acer 2-in-1 performed like they would. My kids have used the Acer Switch 2-in-1 to

 

Play games like Civ 5, Lego Hobbit, Minecraft

Code using Pyton, Scratch, Minecraft Red Blocks

Watch Movies thru Amazon Prime, YouTube, Hulu and Netflix

 

And of course, using Office 2013. All of it, without the hassles. I figured, Mix 2 11 is a wonderful device, but I can't accept the flaw that makes the system bog down. Acer Switch 11 lacks the rear camera, which I really prefer, but the Gorilla Glass is what makes up for it.

 

I guess that's it for me, goodbye Miix 2 11...

0 person found this solution to be helpful.

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11 Posts

01-08-2015

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Re: Miix 2 11 (and similar) CPU Throttle "Mystery" Solved

2015-02-27, 3:08 AM

I installed the latest bios just now and the situation became more severe. The processor is fixed at around 0.6GHz. I could not even see it running over 1GHz. Is there any way to complain about this issue? Will lenovo care about their customers?

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2 Posts

04-25-2015

United States

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Re: CPU unlock causes worst stutter

2015-04-25, 4:48 AM

the bar edit trick seems to cause the motherboard to put one of the cores to sleep to keep the SoC within the 4.5W SDP. You can confirm this in the Intel Extreme Tuning tool. Check the number of  'active cores' after you set the value to 0 with bar-edit.

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5 Posts

05-27-2015

China

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Re: Miix 2 11 (and similar) CPU Throttle "Mystery" Solved

2015-05-27, 11:11 AM

agree with you .never buy lenovo again!

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18 Posts

10-03-2014

Alabama

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  • Message 35 of 40

Re: Miix 2 11 (and similar) CPU Throttle "Mystery" Solved

2015-06-03, 0:02 AM

Going to die from lack of surprise ...

 

Lenovo has stopped carrying the MIIX 2 11. They are sold out and claim it's no longer available. At least no one else will have to deal with it's lack of performance for ... almost anything. I still do use mine, but it's relagated to be an $800 web browser and mail client. That was quite a waste of $600. Live and learn.

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11 Posts

01-08-2015

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Re: Miix 2 11 (and similar) CPU Throttle "Mystery" Solved

2015-06-03, 14:08 PM

I know that feel. I could only use it as a laptop with basic competence. I WOULD NEVER BUY THIS BRAND AGAIN.

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36 Posts

01-05-2015

Republic of Korea

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Re: Miix 2 11 (and similar) CPU Throttle "Mystery" Solved

2015-06-04, 1:11 AM

I wish I had a solution for everyone :( but it really seems like it is impossible to do much without modifying the hardware or knowing exactly how Lenovo's embedded controllers work. 

 

I do have one small tip for people who want to play some simple/older 3d games on this device:

In Intel Extreme Tuning Utility: set Turbo Boost Power Max and Turbo Boost Short Power max to 4.5W.

To further improve performance try undervolting cpu and gpu too.

 

When we limit the the power by software to 4.5W the hardware controller will not send a hardware interrupt because of exceeding 4.5W(the power is kept just at the limit by other means).

 

The hardware interrupts cause the device to stutter heavily in games/ graphical applications etc, if you do this the FPS will not improve but it will seem much smoother. 

This does not by any means make the device performance 'good' though, it is still way too limited on power.

Also be aware if you limit the power to 4.5W in XTU you won't get CPU turbo 'bursts', so CPU performance will be worse but this does not matter in games which run continously. 

 

This is one of the most posted threads in this sub-forum now and no response from Lenovo, sigh... The hardware has alot of potential but the limits they have put in are just ridicilous, and the methods used for limiting are even more ridiciluous, I doubt anyone tested this device more than 10 minutes before going in to production.

 

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27 Posts

12-11-2014

San Diego

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  • Message 38 of 40

Re: Miix 2 11 (and similar) CPU Throttle "Mystery" Solved

2015-06-04, 6:00 AM

"I do have one small tip for people who want to play some simple/older 3d games on this device:

In Intel Extreme Tuning Utility: set Turbo Boost Power Max and Turbo Boost Short Power max to 4.5W."

 

Could you please tell us how to do this. I can't find the Intel Extreme Tuning Utility. Thanks.

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36 Posts

01-05-2015

Republic of Korea

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Re: Miix 2 11 (and similar) CPU Throttle "Mystery" Solved

2015-06-04, 9:42 AM

Download the program here:

 

http://www.intel.com/content/www/us/en/motherboards/desktop-motherboards/desktop-boards-software-extreme-tuning-utility.html

 

On the Advanced tuning -> All Controls page you will find the relevant sliders that I mentioned in previous post

 

For Dynamic CPU Voltage Offset and GPU voltage offset you may want to start with -50 mV and work your way down until you see artifacts or something crashes. Cache should be OK at -100mV ( at least on my device ) or less

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5 Posts

05-27-2015

China

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  • Message 40 of 40

Re: Miix 2 11 (and similar) CPU Throttle "Mystery" Solved

2015-06-05, 3:56 AM

thx

 
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