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43 Posts

11-01-2019

Poland

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Re: y540 heat and BIOS issues

2019-11-05, 21:31 PM

ok, I played a bit and 26WW seems to be better.
IMO, fans speed are better controlled, CPU can achieve 4GHz and is almost stable all time, more power is delivered to CPU (sometimes ca. 45-50W) so I will stick with this one.

 

@Nexon - thank you for support ;)

 

P.S. I use ThrottleStop to undervolt CPU,

I've read many guides/manuals and almost in all of them is written that core and cache undervolting values must be the same (to avoid stability problems).
Do you have core and cache set to -140mV ?

 

 

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11 Posts

09-19-2019

Saudi Arabia

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  • Message 32 of 83

Re: y540 heat and BIOS issues

2019-11-05, 22:15 PM

thank you nexon and all for the help

im now undervolting by XTU for -150core and using bio 26ww as nexon said

laptop now is very better :)

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86 Posts

08-28-2019

Czech Republic

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  • Message 33 of 83

Re: y540 heat and BIOS issues

2019-11-05, 23:18 PM
No problem at all, I just want to share information I had to gather by myself when I bought the laptop as 26WW is very rare in Y540 out of the box, they sent out vast majority of them with 27WW and 28WW.

Ok I will give some other tweaks that you may find helpful to reach full performance.

In ThrottleStop:
1. tick Speedshift and change that value to 64
2. In turbo ratio columm of Fivr, change it to similar pattern as mine from up to down: 41,40,40,39,39,38. Even if go down up to 36 you lose nothing! out of your performance while lowering temps a lot, meaning you are quite likely to gain some fps because of this.
If you need to render video or something just make second profile and keep ratios as they are and follow just the rest of steps.
3. TPL window: change long power to 65
change short to 80
That should reduce temps some more too.

Hope this helps.

In XTU app they are paired but I had previously at 150mV both which caused problems sometimes so I changed to 170 on core and 130 on cache because cache does not provide as much heat as cores but often causes instability when too low. This setting has been working better for me so far.
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86 Posts

08-28-2019

Czech Republic

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  • Message 34 of 83

Re: y540 heat and BIOS issues

2019-11-05, 23:19 PM
I hope you can fully enjoy it now Vulter :)
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26 Posts

10-05-2019

France

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  • Message 35 of 83

Re: y540 heat and BIOS issues

2019-11-19, 0:15 AM

Really nice post I have to reckon. There are great advice I'm going to apply right now, especially for the bios downgrade. 

 

I'm experiencing issues right now. Since I installed the new Vantage from Windows Store, my Thermal mode is totally messed up. No matter the Thermal mode, the TDP is the same, just quieter fans on Quiet mode. But that's an issue since the Watt usage is the same as Perf mode, so a lot of heat!

 

I've also noticed a weird thing: when Hybrid mode is OFF, during CPU load, fan makes as much noise no matter the thermal mode. WHEREAS in Hybrid ON, fans get very quiet even during CPU load. Have you experienced the same thing? Or is it just a WW32 thing?

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26 Posts

10-05-2019

France

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  • Message 36 of 83

Re: y540 heat and BIOS issues

2019-11-19, 0:39 AM

I downgraded and the issue I was experiencing is still here: Quiet mode no longer sets CPU Usage to 25W, as it used to do even on WW32. TDP is set to PL1 45W, where as it used to be 65W in Perf mode...

I just remember having installed lenovo vantage from WIndows Store and did manual driver install from Lenovo software page, such as Intel Thermal stuff and so on. Could it be that? I uninstalled these Thermal drivers but my problem still persists.

 

1. What are your PL1 and PL2 Power Limits?

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43 Posts

11-01-2019

Poland

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  • Message 37 of 83

Re: y540 heat and BIOS issues

2019-11-27, 21:50 PM

I'm on 26WW.

 

Silent mode:

PL1 = 25W

PL2 = 45W

 

Balanced mode:

PL1 = 60W

PL2 = 80W

 

Performance mode:

PL1 = 70W

PL2 = 107W

 

ThrottleStop

CPU core and cache -125mV

speed shift EPP = 1

max PL1 and PL2 values like shown in performance mode :)

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26 Posts

10-05-2019

France

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  • Message 38 of 83

Re: y540 heat and BIOS issues

2019-11-27, 21:54 PM

Thanks for your share.

 

Have you noticed CPU PL is capped at 45W on CPU/GPU load? Such as a game. And on Perf mode, GPU PL is 90W instead of 80W on other modes?

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86 Posts

08-28-2019

Czech Republic

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  • Message 39 of 83

Re: y540 heat and BIOS issues

2019-11-27, 22:12 PM
It's TDP is capped to 45W in balance and 50 in performance respectively in combined CPU/GPU workload.

My GPU is capped always at 80ˇ
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43 Posts

11-01-2019

Poland

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  • Message 40 of 83

Re: y540 heat and BIOS issues

2019-11-27, 22:22 PM

Balanced mode, Witcher 3, all sets to UBER.

CPU PL mostly during game at 25-40W but sometimes jumps to 50W.

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