Lenovo Y50-70 FPS Problems

Hello, i have really annoying FPS problem! I'm playing with plugged in to my laptop with battery inside my laptop.
I tried to play on "Conservation Mode" when battery always charged on 60% and without when battery charged on 100%

My problem is: after some time like 2-5 mins i lose immediately 20-30 fps in Crysis 2 (From 55-65 stable to 35-45 stable FPS). for example In Day of Defeat: Source.
I lose from 120 stable FPS, to 40-50 stable after 5-10 mins of playing.

Maybe i need to play without battery inside my laptop? to avoid these FPS drops? (I'm using this laptop 99% at home as working and gaming machine)

P.S.

1) My settings are on "High Performance" in "Energy Manager".
2) All my NVIDIA drivers are updated.
3) I'm also using "GeForce Experience" and set my games to "Optimal settings"

 

Please install a temperature logging application (such has hwinfo or throttlestop - i recommend throttlestop) and log your temps during gameplay.
Quite honestly it just sounds like throttling after overheating.
On what surface do you use the machine?

 

That's my temperatures after 5 mins of gaming:

My laptop are on towel on wood table.

 

On a towel?! Damn, you're suffocating it. CPU is overheating like crazy.

 

On what surface you recommend to place my Laptop? Just on wood Table? to remove that Towel?

 

Any flat, solid surface that keeps it elevated enough that the intakes aren't blocked. You might consider raising the bottom of the laptop even more with some bottle caps. Get rid of the towel ASAP, you're lucky it didn't catch on fire.

 

Thank for advise/help! Now fps while playing seems to be normal even a bit more then usual I tested while i'm playing now my CPU temperatures 70-75c. Is it normal? on desktop while working my temps are : 45-52c.

 

Yeah those temps are fine.

 

Whew. Glad problem's solved ) Cooling is very important, you really are lucky it didn't catch fire or get damaged.

 

May I ask why you put it on a towel? You are really lucky.