I want to relate an interesting thing I discovered with an AMI v4 (IV) UEFI -based motherboard I purchased recently - after I clear CMOS, the next boot I get a screen that shows me I can overclock to 3.6ghz using a base clock multiplier change, whereas on every boot thereafter UEFI shows what the manufacturer actually claims for the board, which is that you can only underclock (2.2ghz and lower, down to 800mhz):
Picture of the overclock setting working
Picture of what the options are after reboot
My system setup's relevant bits are as follows:
CPU: AMD Athlon 5370
Motherboard: Biostar AM1MH Motherboard
UEFI Version: AKBAT411
RAM: 1x4gb Crucial DDR3 RAM
HDD: 250gb SATA II Western Digital 7200rpm
The UEFI is plainly not working as intended here, but what's most interesting to me is the possibility that the higher base clock values could be permanently enabled if only we could modify this AMI UEFI appropriately. I am a total novice at this, but I was able to get a little headway by downloading the UEFI file from Biostar (they give it to you as a .bss file) and renaming it as a .rom file. This ROM was readable by AMIBCP v. 4.53
![.zip]( "ZIP File")
AMIBCP 4.53.0050.zip (Size: 309.1 KB / Downloads: 0)
, which gives me the following:
![.jpg]( "JPG Image")
Screenshot_4.jpg (Size: 113.94 KB / Downloads: 2)
The "USER" allowances were added by me; before they all said "Default."
Up to now, that is all the editing of the file I've done
![Blush]( "Blush")
. I haven't flashed it yet because I don't know if I will brick my device in so doing and I don't even know if it will accomplish what I want to do.
Can anyone point me in the right direction for unlocking the overclocking values in this BIOS? If you want to fiddle around with it yourself you're certainly welcome to; I've included all the necessary data as attachments to this post. What's in it for you? I think if we can figure out how to do this here, then many Biostar BIOSes will benefit from the same modification; I think they tend to reuse this UEFI on multiple boards. This could be the start of a widespread edit helpful to many other people as well, especially since the AM1 community is starved for motherboards with good UEFIs.
![.zip]( "ZIP File")
AKBAT411.zip (Size: 1.93 MB / Downloads: 0)
![[Image: WhatsApp_Image_2016-10-31_at_01.21.53.jpeg?1477928873]](http://uploaddeimagens.com.br/images/000/760/844/full/WhatsApp_Image_2016-10-31_at_01.21.53.jpeg?1477928873)
![[Image: smile.gif]](http://www.bios-mods.com/forum/images/smilies/smile.gif)
. I haven't flashed it yet because I don't know if I will brick my device in so doing and I don't even know if it will accomplish what I want to do.