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[REQUEST] Acer EG43M & G43T-AM BIOS Unlock
Yes i saw the post sorry about the delay. Unfortunately there isn't a single option hidden in this bios which means that the only path left to take is to try and find a retail motherboard which you coulld flash the bios over to but this is extremely risky and lots of research would need to be done.


I have an old Packard Bell iXtream M5722. I bought a GTX 960 card for it but I soon figured out that the old q8300 is a big bottleneck. Bios does not have any overclocking features so I tried setFSB but the motherboard pll - CV194CPAG was not supported. So unlocking the bios is my last resort.

CPU-Z info:
Motherboard: Packard Bell
Model: EG43M

Bios: American Megatrends Inc.
Version: P01-A0
Date: 08/18/2009

Packard Bell website has a newer version P01-A1 for this desktop - link

Is it possible to unlock it? Thanks in advance!
Hi, I need some help.

I modded an Intel Xeon E5450 to fit in a lga 775 socket. I added xeon microcodes to the bios and flashed it. All went well, the bios recognize the cpu.

The problem arise at os boot time as both debian and windows get's stuck at the very initial boot procedure.

I knew that i could face this problem, as in some cases there is the need to disable Intel c-state c1e in bios. The fact is there is no such option in it.

As a workaround:

- for windows i've changed the registry key ControlSet001\Services\intelppm\Start from 3 to 4.
- for debian i've added the kernel option intel_idle.max_cstate=1 in grub

Both systems boots fine now, but i think i/i'll have some issues:

- In windows all seems fine, but i wonder if i'll need, some day, to install windows from scratch, will i be able to do it?

- (please read the UPDATE in the second post) In debian i observe high cores temperatures (~65°C on idle). I guess is because the kernel option intel_idle.max_cstate=1 doesn't disable c1e only, but it will set, as the option name say, the max c-state (c1 in this case), and the cpu can't go on deeper c-states. As of now i haven't found a way to disable c1e only.
-  Again, will i be able to install debian, or any other os?

All this to say, there is a way to add the option to disable c1e in my bios? And while we're at it, unlocking any other hidden options?

Attached there is the official bios file (P01-A1.1M.rom) and the one with xeon microcodes (p01-a1.1m_xeon.rom).

Thanks and best regards!

Attached Files
.rom   P01-A1.1M.rom (Size: 1 MB / Downloads: 1)
.rom   p01-a1.1m_xeon.rom (Size: 1 MB / Downloads: 0)

Solved the high cores temperatures on debian. In coretemp kernel module the tjmax was at 100°, while for the Xeon E5450 the right value seems to be 85°. I've now set the correct tjmax by adding
options coretemp tjmax=85
and now the cores temperatures are ~50°C on idle.

Obviously the temperatures aren't "lower" now, but the readings should just be more accurate.

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