I have a helios 300 i5-9300H gtx 1660 ti and since it is not available and still coming soon,  i had used the TS setup for i5-8300H and it worked like magic. My max temps are now 74 on cpu and 68 on gpu compared to 90 and 86 respectively before using TS

am on Triton 300 with i5-9300H, it run stable on -149,6 

it might be able to go higher. But i havent tried it, since am quite satisfied it can run stable 4.0Ghz

I have the same processor but with a 1650 and I’m able to go all the way down to -.160V with a stable 4.0 ghz, no thermal throttling or power limit throttling.Still using stock thermal paste as well.

Sumanth said:

Hello, the pre configured profile for i5 9300H is not listed on the site yet, i tried using the 8300H profile, but the results were off...
My Laptop : Acer Predator Helios 300 PH315-52-5520 Gaming Laptop
CPU : i5 9300H
GPU : GTX 1660Ti GDDR6 6GB Overclockable
RAM : 1 X 16GB DDR4 2666 MHz (Single Channel)
I openly say that i'm not a specialist of any sort, but these were the problems i was facing with the i5 8300H profile.
The power limit was raised to 50 from 45 (thermal throttling > 5% aida64 extreme)
The core frequencies were around 35,34,34,35, (from 41,41,40,40)
Speed Shift EPP was not set to 0 either
My laptop did run cooler although with lower performance as the CPU now ran at 3.4GHz on avg
The undervolt was set to around 0.134.

And here's what seemed to work ok to me:
Speed Shift EPP : 0
Undervolt : -140.6 on both CPU cache and core
This gave me better temperatures, better performance.
To be specific, almost 7 degrees or more difference (decrease) and around 10 FPS increase (from 64 to 74) in FarCry 5 Ultra Settings 1080p.
Hope this helps, if anyone has any other better settings please do let me know

Update : I just want to say this out loud, I'm no specialist, but i can guarantee you, that not all the benchmark systems out there are running the CPU to the same extremities, and in real life most of us wont even be getting any close to that sort of usage unless the app itself is not optimized properly, or maybe it does happen some time later in the future where this hardware is rendered too old for the advancement in the benchmarks themselves by then.

Also a reminder, you can Undervolt your laptop with XTU but, as soon as you toggle the Turbo button (TOGGLE not necessarily ON or OFF, sometimes its buggy and can delay the process of changing the undervolt) or any other type of high performance mode, these settings that you made will be over written. Use ThrottleStop, which can not only monitor in real time, but can also make sure everything is the same irrespective of which performance mode you are using. You can set it to start up and apply the settings just when the windows starts up. You can find videos on youtube about the same.

And coming to the undervolt of - 140.6mV on both core and cache, is it stable you ask?
Like i said, it depends on the type of benchmark you are using, XTU's benchmark was actually so lite on the CPU that i could go upto -160mV before crashing (reboot) at -165mV. So i went ahead tested - 160mV again, in some games, fine, but during the launch and closing of these applications, blue screen, same with everything between -140mV to -160mV. At -140mV all of the games i play, which do put quite some load on the CPU, example : Farcry 5, New Dawn, ROTTR, SOTTR, NFS Payback, GTA 5, Forza Horizon 4, and some video editing in Hitfilm Express. Everything worked just fine. 
But as soon as i try to multi task, example, having 2 tabs open in chrome, a PDF file open in adobe reader, spotify or something even very lite like Snipping tool cause crashes in any of the above apps, mostly adobe reader, spotify and chrome.
Similar thing happens while browsing at random. So although this undervolt is good for gaming, not great for multi tasking, no blue screen till now though.
But then again, yes, it will still thermal throttle in very intense CPU Benchmarks, even Throttlestop's in built one gives atleast 20 - 40 errors, but also eep in mind it gives errors at even - 125mV. And I met a guy who said his CPU temps never crossed 75 degrees, and still hit good framerate, but turns out its in an old game which doesn't require high CPU power anyways. If he were to do that in modern titles, he'd surely see that those core clocks were pinned to 3GHz (as he claimed) he would surely see really bad results. 
So all im saying is.. everyone's CPU is different, they can take it to different extremities (although within a range), and still be fine because different people exert their system to different types and levels of workloads. Maybe you don't care about multitasking, you just want to play games, maybe all you do is multi tasking and work rather than gaming, maybe all you do is CPU stress tests and benchmarks.
Depending on all that, different people can say different undervolts to be stable, just try it out yourself, if for your work usage, you never face a problem, i think you are good to go with that undervolt. 

And i think, people who are claiming that i5 8300H's settings are great in thermal performance for them, should need to check their clock speeds and performance numbers, cause for me although the temps are ice cold, the performance drop is immense, but hey then again.. maybe it truely works for you.
Please do share you thoughts, opinions and results!

I HAVE HELIOS 300 i5-9300h and rtx 2060.. what is the best throttling for the laptop??

Hi! So, I have an Acer Nitro 5 and I used the i5-8300H preset (on a i5-9300H) and my clocks were at 3.4Ghz on all cores and I thought it was fine until the following day. Today (the following day), my laptop stuttered several times when I had Apple Music playing the background, Chrome open (4 tabs), and an equalizer open. Before apply the undervolting, I've had several applications open and this hasn't happened before. (To be transparent, I had the computer officially serviced at Acer and they said they updated my BIOS. Because the BIOS was updated, I still don't know if it's the BIOS that slowed my computer down or the undervolting.) As a result, I uninstalled the i5-8300H throttlestop preset and installed the i7-9750H preset (and the others). The results were more than I desired... (4.0GHz on all cores) however, my temps went to around 177°F now. Now, the reason behind me undervolting was because GTA5 was sending my temps all the way to 204°F (not undervolted) even though the computer was raised and had good access to fresh air (I still don't know if this was because of the BIOS update because I used to peak at around 180-190°F before it went to be repaired). So, I'm wondering whether this is bad for my computer and if I should go down to i7-8750H's preset or even all the way back to i5-8300H? I desire to have lower temperatures because I plan to have this computer last for at least 4 more years but, I also don't want to have a compromised (slower) computer. Would appreciate any help, thanks!!!

I also would like to add that the item that was repaired was the bottom case of my laptop and not any parts, the only issue I can think of is that the bottom case is affecting cooling... somehow?

(Copied from the thread with the presets)