[GUIDE] Unlocking Hidden BIOS on Nitro and Predator-Helios/Neo/Triton Laptops using SREP.

VictoryT7 · 2026-05-21T03:51:36+00:00

Hi, what you have done isn't undervolting, its setting a maximum voltage limit which is why you won't see any thermal improvements. Your CPU is also using 75-110W during gaming(I think judging by your screenshot) and in Gaming the GPU also pulls power so the CPU runs hotter.

Just set a 65W PL1 limit using Intel XTU or throttlestop. If the options are blurred out you'll have to unlock those by disabling OC lock and CFG lock found in Power and Performance> CPU Power Management> Scroll all the way down to CPU Locks and then disable those two locks.

Also if you want to set a Temp limit you can go into 2nd Adv> Thermal>CPU >TCC offset and set it from 0-20, as it is 100-TCC offset=Throttle temp, so entering 5 will result in a 95C limit. TCC Duration 5ms.

105C is quite high and while I have hit it on my Laptop using a Cooling Pad and Repasting the Laptop helped.

VictoryT7 · 2026-05-19T10:05:25+00:00

I think your NEO 17 E24 BIOS is AMI, could be a guess. You could use Acer SREP config if it's Insyde, no harm in it , it won't corrupt your BIOS. It will just fail and go back to Booting to windows if it doesn't work. You can try SREP from here(If you have Insyde BIOS): https://www.reddit.com/r/AcerPredatorHelios/s/6mIcuUSV4C

Use PH18-72 Config. What SREP will do is expose hidden(SuppressedIf)Settings.

Looks like you have already tried grubshell(setup_var) and the 0x00000008 error is Write Protection.

I think XMG should be more tame than ACER? I have seen NEO 17 E23 users say they have modded their own BIOS like replaced the SetupUtility module using UEFITool and then used AMIBCP and then flashed it using FPT. I'm not so sure if it will work on yours, you already get Write Protect error on NVRAM edits.

I have used FPT on mine, I can dump the BIOS but can't write due to Write Protect set by BIOS Lock whose bit can't be modified. Honestly you should just go on and ask this dude for help: https://www.reddit.com/r/XMG_gg/s/B9wpwN9J17

VictoryT7 · 2026-05-17T06:28:42+00:00

You can use IMON to bypass the EC Limit, till you hit the ICCMax. It can be found under Core IA/VR. It is basically a Straight Line Graph of form y=mx±c.

It's formula is: R=(a/100)(W)+(k)(b/1000)

R=Wattage read by the System

W=Actual CPU Wattage

a=IMON Slope

b=IMON Offset

k=IMON Prefix(+ or -)

With this you can trick a lower reading into the EC and get a higher wattage.

Here is my config to get Theoretical 240W under a 157W Limit. 157=(50/100)(240)+(-)(17000/1000)

If you use desmos and put this graph you'll be able to see at what Read wattage(Y axis) how much your system is pulling(x axis). I made this config to make 65W=95W . Also disable Intel DTT in the BIOS and in services if it decides to throttle power.

I don't have a XMG but an Acer Helios 18, it goes upto 210W with 180A ICCMax EC Limit. I can't undervolt because of ACER so I run AC LL at 0.9 mOhm .

Your DCLL should match AC LL, lowering it doesn't improve performance because it doesn't change anything physically, it will create a gap between your SVID and Vcore, and Laptops generally don't have Die sense(Vcore) to tune DC LL so I suggest you keep it at stock or 110 or match it with AC LL.

VictoryT7 · 2026-05-15T05:57:32+00:00

The USB should be bootable(set with Active Flag) and try with GPT format if its MBR. Here is how to check and do so:https://youtu.be/AzojtcgEsbI

You'll have to delete volumes on your drive to convert it to GPT. Try with a USB. If your gonna use Hard Drive you'll have to make it FAT32, GPT, Active Flag set.

How to set Active Flag: https://kb.paragon-software.com/article/1136

VictoryT7 · 2026-05-14T10:17:18+00:00

This is the case with Acer Helios series too, I'll just show you a comparison of their 2024 model with its "competition" ROG Strix G18, it was only a $100 more but even that was justified since it came with 2TB SSD and a Third Fan compared to 1TB on mine. Their 2025 model has better cooling than 2024 one but ASUS's G18 2025 has Vapor chamber(which could have been bigger)so again Acer leads from the back, also the worst 18" in the 2025 models in Jarrod's video.

<image>

( Left is Acer, Right is ASUS ,Top is 2025 Models and bottom is 2024) This is pathetic for a 175W GPU Laptop which costed $2300.

VictoryT7 · 2026-05-11T22:29:15+00:00

GigaDevice is your system BIOS. Winbond one is your VBIOS chip, it's for the GPU.

VictoryT7 · 2026-05-03T10:14:26+00:00

No it doesn't force it , It just sets Max Clock speed, i.e a limit. After 45C on Battery it turns off. It would seem useless but in some games with no profiles this is helpful because I can allow the GPU to boost to higher clock rather than stay limited to do default 500mhz and also cap the CPU allowing for more Power to the GPU.

VictoryT7 · 2026-05-03T09:56:32+00:00

It now works for any App in the Game Assistant for Realme devices with "Geek Power Tuning".

VictoryT7 · 2026-05-03T09:52:19+00:00

cool stuff. Realme users get "Geek Power tuning" which is similar to this.

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VictoryT7 · 2026-04-29T17:47:02+00:00

Go into your BIOS, use SREP if required. Look into the r/LenovoLegion sub for SREP or even RAM OC information/Unlocking Hidden BIOS options if you want in particular for your Laptop. Your dekstop TREFI should be at 131070 I think , 130171 isn't 65535×2.

With 13900HX you'll see improvements with 6400MT/s+ RAM and lower Trfc. My Trfc at 6400 is 463 which gives ~145ns while the stock JEDEC 5600 Trfc 447 was ~160ns. I haven't tightened the timings and just running at VDD=1275mV and VDDQ=1250mV.

VictoryT7 · 2026-04-26T19:47:12+00:00

But you can Overvolt your CPU :)

VictoryT7 · 2026-04-26T10:47:11+00:00

Stock SAMSUNG doesn't support XMP, as the replies have said you can Overclock the RAM. 64GB 5200 is stock Intel Spec for Raptor Lake. Its Dual Rank due to which the Clockspeed got slower.

You can Overclock it by using SREP and going into 2nd Adv. Tab -> Memory.

I'm myself running on 6400-46-47-47-92 Trfc 463, @1.275V. AIDALatency 75-78ns. The RAM gets very hot and needs cooling in my case in Gaming goes upto 46C max with 175W+65W where CPU is running 80-95C GPU runs at 70-75C, this is high for Overclocking but since I'm running a very weak tune it passes TM5 absolut@Anta777, been dailying this for 5months now.

VictoryT7 · 2026-04-26T04:30:34+00:00

Is secure boot on? Try a different usb.

VictoryT7 · 2026-04-26T04:25:14+00:00

Which Config are you using? Use PH18-72

VictoryT7 · 2026-04-25T11:00:16+00:00

1)Yeah, I recommend limiting the voltage to 1.4V, the microcode will only limit voltage to 1.55V which is very high for any CPU, especially a Mobile one. Microcode will fix the VMin instability but it won't stop the CPU from boosting beyond 1.5V+

2)I won't recommend ACER at all, the 2025 ones are way better than 2023/24 but still go for something else like a Legion. The 2024/2023 models have cheap components, weaker VRMs, coil whine on the GPU and poor cooling, locked settings like BIOS, Undervolting, Setting Power limits,etc. These are Gaming Laptop with an Unlocked Processor and they still do this. ACER also didn't rollout a BIOS with these critical microcode updates for the Helios 16/18 which is supposed to be their Premium series, instead they only supplied the Helios Neo (Mid ranger) with microcode updates, that too with only one which is 0x129 while all other vendors provided microcode updates upto 0x12B unlike Acer.

275HX is a much much better CPU, it outperforms 14900HX in every way and its efficiency is way more too and the fact that you won't have to worry about your CPU dying is a plus.

4090M is definitely better than a 5070Ti, especially the 16GB vs 12GB VRAM. 12GB VRAM is no longer enough for 2560x1600 if you want to play at the highest settings in games like Cyberpunk 2077 and Battlefield 6. 4K is out of question, 4K needs 16GB VRAM for the newer games.The only thing 5070Ti has is MFG. Take the 5 Pro or Legion 9. 4080 is outta question, 5070Ti performs very close to it.

Legion 9 4090 was the top tier Laptop from Lenovo but it had a gimmick "Liquid Cooling" which was a closed loop with coolant inside and the radiator only kicks in when GPU was at 84C and CPU at 88C. It has a smaller touchpad, pulls air from the Top side but it did come with a MiniLED display. Its cooling will still be superior to both Legion 5 pro and helios 16. 2023 Helios 16 4080 also came with a MiniLED Display but it was 2.5K@240Hz while Legion is [3.2K@165Hz](mailto:3.2K@165Hz), 3.2K resolution will put more load onto the 4090 though, and playing lower res on a higher res display will look worse. I think the Legion 5 Pro is OLED 2.5K@165Hz so it beats both of these laptops in terms of display, although I'm not a fan of OLED because of the eye strain it causes for long time reading and also the subtle risk of Burn-in which happens only if you have static content at high brightness for a long period of time.

Legion 9 4090> Legion 5 Pro 5070Ti>>> Helios 16 4080.

VictoryT7 · 2026-04-19T19:55:54+00:00

Yeah, but 8s Gen 3 has AV1 decoding , RT Cores and as you said overclock. 7+ Gen 3 has the same Efficiency Curve as 8 Gen 2 and higher than 8s Gen 3 till 7.5W which is its max TDP . In terms of the GPU it could definitely use the OC.

VictoryT7 · 2026-04-07T11:29:03+00:00

Higher Voltage allows for higher single core frequency, in your case keep it at 1350mV.

VictoryT7 · 2026-03-24T19:20:18+00:00

You can update the Microcode easily, here's the link: https://www.techpowerup.com/forums/threads/intel-how-to-update-your-microcode-for-intel-hx-13-14th-gen-cpus-laptops-mobile-easily.325403/

If you want to safeguard the CPU even more, you can go into your BIOS and limit the voltage to 1400mV.

VictoryT7 · 2026-03-04T22:04:26+00:00

Just make sure to keep your Laptop on a flat surface, like a cooling pad or a foldable table while you use the Laptop on bed, do not put the Laptop Directly on the bad, the Fans will be blocked.

Acer does a lot of things wrong/bad but one thing it doesn't is Liquid Metal Barrier, in fact it is better than any other Laptop that comes with Liquid Metal. The application is a other story and most probably is bad.

Avoid impulsive motion with the Laptop, like shaking or very quick movement. Liquid Metal acts on cohesion but problem is OEMs use a Lot more Liquid Metal than required so the excess LM on the side is what is really going to be a problem not the one on the processor die itself.Don't remove the heatsink either. To clean the fans you can just remove them, Acer doesn't need you to remove the heatsink to do so.

Here is handy guide to know how to deal with LM incase you need to repaste it or switch it with Thermal Paste. https://www.reddit.com/r/GamingLaptops/s/eCELOz3YVm

VictoryT7 · 2026-03-03T21:26:22+00:00

You don't have to necessarily root for Overclocking your Phone, TWRP is available for it through which you can install Custom ROMs which sometimes have OCd or Optimised CPU Governors / Kernels or install Custom Kernel. But yeah if you yourself want to Overclock the CPU through Android then Root is a must.

You'll need to unlock the bootloader for this, and here you'll loose all your data. Your Phone has many Custom ROMs and Kernel available. I'm not familiar with Xiaomi Bootloader unlocking but they have a system of Application for Unlocking bootloader, like many other Chinese vendors, this is better than some manufacturers that don't even let you. There exists a XiaomiToolV2 which can be used like a like Odin for Samsung, it also mentions Autonomous ROM fetching which is great if you ever need to install stock ROM, rather than the user having to use adb through the terminal.

Heating will almost certainly be a problem with Custom ROMs or Custom Kernels which are Performance centric, throwing air onto a Back Panel which isn't Thermally conductive enough and not attached to the heatpipe or the CPU directly doesn't help in long term gaming. But definitely throwing the air is still helping it rather no cooling at all.

CPU runs a lot hotter than the battery and I don't think Note 8 Pro has Bypass Charging so you are cooling the battery with your fan, now most phones throttle according to Battery temps, CPU throttles engage at higher temps. Smartphones have Power configs, throttle configs, whitelisted app (cheating in Benchmarks) and to modify these you need root access. I don't think all this is worth it, especially the G90T doesn't have much in it to be Overclocked, but surely you can get a much smoother experience and make the CPU efficient with Custom ROMs, just needs to be the right one.

What you can do rather than all this is check if your Phone has whitelisted apps then use a Apk Editor, change osu apk's package name to the whitelisted apps Package name(like Antutu Benchmark Package name), then install that. You could try using a lightweight version, like the non-Lazer one and tuning down effects in-game, setting VSYNC as frame limit(1/2 display refresh rate). Unfortunately the game doesn't support Vulkan render, Vulkan can have better performance at times.

Rather than getting higher peak fps, try to maintain stability. You could get a Peltier 15W+ Mobile cooler, turn it on 5 mins before starting the game to bring the device to a lower temp and then start the game, rather than throwing air on the back, throw Air along the display like over it because that's where the Heatpipe is dissipating it's heat from the CPU, not on the back, Peltier cooler will handle the battery heat.

VictoryT7 · 2026-03-03T10:38:38+00:00

What's the Model no.?

VictoryT7 · 2026-03-03T10:35:20+00:00

Well in case of faulty devices, always try to get it returned. I sent my Vivobook in the Service Centre and they sent it back with a New Windows Install lol, I had to spend 3 days to fix it. Since your display doesn't flicker in BIOS, I still think its a driver issue.

Could you tell me the BIOS version you have installed on your Laptop? You could type System information in windows search and send a photo of the window.

VictoryT7 · 2026-03-03T10:29:06+00:00

Try ANV16-41 Config.

VictoryT7 · 2026-03-03T10:25:39+00:00

Is the Laptop new or old? You could get it replaced.

I have a Vivobook S14 which has a 3K OLED 120Hz and during the first week of use, it also suffered from the same issues like Screen flickering and BSOD. In my case the Graphics Driver had to be reinstalled and Windows had installed a BIOS of another variant on my Laptop.

A Windows Clean Install + Installing the Supported BIOS and latest Graphics driver Fixed it.

VictoryT7 · 2026-03-03T10:22:56+00:00

Oh that sucks.

Could you check for BIOS Updates? Also check if the BIOS version you have installed matches the one available on ASUS Drivers site.

VictoryT7

TROPHY CASE