Acer Predator G5 modding

Hey guys!
I have purchased an Acer Predator G5-793 laptop because my local Acer Shop was selling it rather cheap ($1150 including 27% sales tax, in the US it would have cost around $850) considering that this is a G-Sync laptop with non-MaxQ GTX 1060.

After deeply inspecting the conclusion was that this laptop is almost the same as the much more expensive Acer Predator G9:
- same motherboard (with different VGA soldered to it)
- the case of the laptop is the same
- several features have been removed to reduce cost

Acer actually used a pretty eyerolling method at some parts to make the laptop "look cheaper", so I decided it is time to mod it

Changing the factory installed RAM
My model arrived with 1x 8 Gb 2400 Mhz CL17 memory, which is not the best option even for a laptop at the end of 2018.
There are 4 RAM slots total on this motherboard, however the user can only access SLOTS 2 and 4 which are on the back of the motherboard:



Unfortunately the factory installed RAM is in slot 1, which is on the other side of the motherboard, so complete disassembly is required to remove it.
I must warn everyone, removing the motherboard from this laptop is rather tricky and can be damaged easily.
However removing it is mandatory for those who want to install faster RAM, because even with the factory BIOS, it supports up to 2666 Mhz @ CL15 ram modules.

Unlocked BIOS
The factory BIOS has most features locked (like as we can see with all laptops), however with the help of pythonic, I was able to get my hands on the unlocked variant of the currently available latest, version 1.14 Insyde BIOS.

Unfortunately the BIOS is write protected so flashing from Windows is not possible and the only way to do it is directly flashing with an SPI programmer. Luckily unlike with the Acer Aspire A717-72G, Acer used a more common, "Winbond" chip here to store the rather large, 16 mb BIOS, so flashing it should be possible with cheaper SPI programmers too.

Some "new menus" which the unlocked BIOS brings:






I mainly wanted the unlocked BIOS to undervolt from here, however unlike with other modded Insyde bioses, the undervolting feature does not work for me here (I apply a setting, but Windows does not detect it). Luckily the other features are working, so I was able to:
1) setting the maximum turbo for each core to be max 3400 Mhz
2) disabling power saving features of the CPU
3) increasing CPU TDP
4) overclocking the previously installed 2666 Mhz CL15 RAM to 2800 Mhz CL15

RAMs working perfectly without error using the above settings:


After running a few Fire Strike tests I can say that with disabling power saving features and setting the turbo for all cores to be the same resulted in the CPU frequency to be much more stable, it is not jumping around now and with the higher TDP it is now not power throttling.
Before this the CPU score differed with each run and the difference was several hundred points in some cases, now however the difference is minimal, but even if there is any, it gains points instead of losing like before and now after several FS runs the CPU score did not drop below 10650.


(These temps are after repasting)

We also tried flashing a modded vBIOS. The default vBIOS is set at 78W TDP, so we tried to flash one with 120W TDP, however this failed. More on this later.

Subwoofer
The speakers built in these laptops are pretty good, they are much better quality than the ones used for example in the Alienware 17 R4. However the G9 has an extra: a subwoofer.
Now, there is room for a subwoofer in the G5 and there is also a connector for it on it's motherboard.
After checking it was confirmed that all 4 pins in the connector are connected to the sound chip, so technically is should work.
So I ordered a subwoofer from Ebay and it got here pretty fast from Germany:



After installing the subwoofer however we run into a problem: it was not working even though it was connected to the sound chip.
Acer seems to have disabled the subwoofer somehow via software (probably somewhere in the BIOS).
Installing the Audio driver released for the G9 did not help.

However since this so called "subwoofer" is just a speaker with better bass, the problem was solved with bypassing the software limiation with connecting the subwoofer to the connector used for the speakers.
All had to done is to extend the connector of the speakers to the subwoofer:



Voálá! Now the subwoofer works ! And it makes quite a difference compared to the default speakers.
However the problem is that Acer covered the subwoofer with tape and rubber on bottom panel, but nothing a little modding can't fix


I even like this better than the G9's cheap looking red plastic:


Backpanel lighting
The G9 features backpanel lighting, however the G5 does not. Acer used a pretty simple trick here. They did not remove anything, no, instead they added an extra: they installed tape over the plastic where light should come out.
This is how the G5 looks after removing the LCD panel:



After removing some of the tape:


The laptop also has a connector to disable the lights on the sides, however it is disconnected by default:


After removing all unnecessary tape, the backpanel lighting now works:


However I did not like the color, on the sides it was light red and the Predator logo in the middle was more like pink than red.
However after adding some kapton tape, the colors are now more orange/yellow:



Troubleshooting
Seems there is a problem with an Audio driver (Which I am still trying to solve) and after each reboot, the "Dolby Audio" software turns off for 2-3 seconds and resets the settings to "Dynamic".

There was also a problem with keyboard lighting. Predator Sense immediately registered fn+f9 keypress, however the the EC only registered every 5-10th keypress so the kb lighting only turned off/on after pressing the above buttons 5-10 times.
Also, when booting the kb lighting:
1) either did not completely turn on
2) 1 or more zones did not turn on
3) everything turned on

After rebooting/starting for 2-3 hours the laptops died completely. It did not turn on. Power button and power led lighted up, but nothing happened, not even the fans turned on. The battery was charging so the BIOS was working.
After carefully testing the problem was found. The reason why the kb was acting up and the reason why the laptop died after a few hours was:
1) when we flashed the modded vBIOS we made a mistake. The vBIOS is stored in the system bios for this model and not a separate Winbond chip (like with the ASUS G752VM) so we succesfully flashed a modded vBIOS into the EC chip
This was corrected (This is why ALWAYS make a backup!! ) , however the laptop still not booted. Still power button and led were lighting but nothing happened, not even fans worked.
The reason behind this that the CMOS battery somehow got damaged and short circuited the motherboard.
So after changing the CMOS battery to a brand new one, the laptop finally came back to life and now all is working

Hope my writing was useful for the community

Thank you KillHates for making the above possible !

Update
Found the vBIOS!
It is NOT stored in the system bios, it is on a separate Macronix MX25U4033E chip!
Default TDP is 78W and with OC maximum graphics score I was able to get was 12200 points in Fire Strike.
I have modded the vBIOS from 78W to 110W, now the max points have increased to 13561 ! Not bad compared to the factory default 11400

3DMark result: https://www.3dmark.com/3dm/32790660?

Was a bit tricky to flash the modded vBIOS.
An RT809F SPI programmer gave validation error when reading the factory vBIOS.
Then we tried an TL866CS which was able to read and save the vBIOS to an 512 kb ROM file.

However when writing the modded vBIOS (256 kb file saved with nvflash) the TL866CS gave write error.
However RT809F was able to write and verify it.

tl;dr: for saving an TL866CS was needed, for writing a RT809F

ps: The new TDP after vBIOS mod (after running 1 Fire Strike test):



TDP is a bit higher than the default 78W

 

good detail and I like the pictures thank you for posting

 

Wow, that's interesting! G9 (593) owner here. Really interested in unlocked bios

 

So can you give some more info on bios? Upload files and photos how you flashed it? Also, bios flashing app have a force mode. Won't it help?

 

For an unlocked BIOS check here:
https://www.bios-mods.com/

Warning !
Flashing the modded bios via software is NOT possible! Only possible way to flash it is with an SPI programmer.

 

With Msi Bios, it's possible to unlock it with "ru". Don't you think it's possible too?

 

MSI is using AMI BIOS while Acer is using Insyde BIOS.

 

Totaly right, sorry.

My old Acer laptop was using an insyde Bios (~2009). I didn't think it was still the same

 

Wish you post some more photos of internals. How you worked with SPI and to open screen...

 

Sorry, no more photos as of yet and will only open it again next week when I make another attempt on unlocking the vbios tdp.

The bios chip is on the other side of the motherboard (under the keyboard), so it's not like most laptops .

To open the screen just pop off the frame around the screen. There are no screws.
However be careful, Acer used a small amount of glue on the left and right side so if you are not careful you might break the frame !

 

Update
Found the vBIOS!
It is NOT stored in the system bios, it is on a separate Macronix MX25U4033E chip!
Default TDP is 78W and with OC maximum graphics score I was able to get was 12200 points in Fire Strike.
I have modded the vBIOS from 78W to 110W, now the max points have increased to 13561 ! Not bad compared to the factory default 11400

3DMark result: https://www.3dmark.com/3dm/32790660?

Was a bit tricky to flash the modded vBIOS.
An RT809F SPI programmer gave validation error when reading the factory vBIOS.
Then we tried an TL866CS which was able to read and save the vBIOS to an 512 kb ROM file.

However when writing the modded vBIOS (256 kb file saved with nvflash) the TL866CS gave write error.
However RT809F was able to write and verify it.

tl;dr: for saving an TL866CS was needed, for writing a RT809F

ps: The new TDP after vBIOS mod (after running 1 Fire Strike test):



TDP is a bit higher than the default 78W

 

Hi everyone,

I am sorry for resurrecting this old thread, but I would like to say thanks to DRevan for this wonderful breakdown of his G5 modding efforts. Recently I had to replace RAM on my own G5 and the process gave me some insight into the inner workings of this model. it seems that the differences between G5 and G9 are forced by Acer ie. backpanel lighting, subwoofer, single M.2 slot etc. I have found another curiosity on the G5 motherboard while I was replacing my RAM, there is a free slim-SATA port (usually used by cd/dvd drives) found on the left of the M.2 slot and there is a strange mounting rack on the back cover where the dvd is supposed to be (the side cover can be removed by removing two small screws in the middle). I have tried with a HDD caddy, and while everything matches the access is blocked by two columns. I have ordered slim-SATA male to SATA female cable online and I'll post an update when I try it.

PS. There are two unused ports nearby, I would appreciate any information about these ports.

 

The one close to the SATA port looks like something for power delivery as it have wide traces, perhaps for powering a storage device?

 

I got my answers on Acer Support Forum,
The left one is SATA port used by my regular SSD, I didn't realize it was the one that connects to tray in the easy access panel. The right one is a debug port used to display system error codes (bios post) but I did't find any hardware that can be used to read it. As for slim SATA port it produces 5v instead of 12v of power, which is enough to power a 2.5" SSD but not enough to power regular 3.5" HDD, besides that there should be no differences.

 

Hello

can you share your unlocked 1.14 bios please i have spi programmer but i can not find unlocked rom

Br

 

Hey DRevan!
It looks like I'm resurrecting a pretty old post but I'm having a lot of issues flashing the bios back onto this WINROM chip (W25Q128FV) It seems like a lot of people have problems when trying to verify with CH341A (including me) It dumped fine, looked good. Went to throw it back on and can't get it to verify on any of the CH341A versions. What was your secret sauce?? I'm beginning to think I've got a bad programmer or just need to run it through flashrom on linux.
Any advise would be great! I'm getting really tired of completely tearing this predator apart lol YOU know the pain I'm talking about!

Thanks,
Seth

 

Í would desolder the flash chip from the motherboard, I never trusted flashing BIOS with the chips in place, because the usual outcome is what you are experiencing, errors while reading/writing.

Its pretty easy to remove the chip with just a soldering iron and fine tweezers.

 

I got home and tested out the programmer and everything looks good, voltages and all. I did a closer look at the chip with a loop and it looks like the clip has damaged the pins. It also looks like there are wires inside the pins. Could this be? Looks like I'll order another couple chips and end up soldering.

 

Hello, i tried to flash my Acer Predator G9-793-79HC with a Mobile GTX 1070 bga card today. The vbios is on a MX25U4033E Chip.
I used the CH341A with a 1.8V adapter.
I used the stock vbios firmware and edited with mobile pascal tdp tweaker.
I unprotected the chip, erased everything, and wrote my edited vbios to the chip. The veriffication was also okay with AsProgrammer.
But i forgot to set the protection bits on again.
The pc is booting (Acer Bios sound works), but no video at all on the laptop display even on a external monitor.
Its a big thing to set the protection bits on again? Or do i have a another Problem?
I have a Backup. Should i reflash the original vbios again?


Edit vbios dump from nvflash:
https://mega.nz/file/n49yyCIL#na1RsQjh21C-VpSwc6LuNpAVqck3izLnnBMefT9JoGw
Original vbios dump made via nvflash:
https://mega.nz/file/D89yFIIA#UHq2eWsoBXmTnxR2Dn9YWKvPi4LyhnXqMloptje9LC0
Original vbios dump from asProgrammer:
https://mega.nz/file/Wx9iVKwL#ISQ0sa5UtDFVN9_X8D_bMlBncz9tmOwIoYlhTgUyElA

 

Hi I have the same laptop and I wont to unlock bios, i disassembled laptop and figeraut that is two bios chip, which one is right?