How do I change BIOS to default version?

[Lukasz_10]

I have an Asus M32AD computer with an Asus H81M-E motherboard. I was wondering on how to change from the Asus M32AD BIOS https://www.asus.com/us/Tower-PCs/M32AD/HelpDesk_Download/ (BIOS it came with) to H81M-E default BIOS https://www.asus.com/Motherboards/H81ME/HelpDesk_Download/ if that makes sense.
Reason why is my current BIOS will not let me change fan speed or voltage and it seems like you can under the H81M-E's defualt BIOS http://www.tomshardware.com/reviews/asrock-b85m-dgs-asrock-h81m-hds-asus-h81m-e-msi-h91m-e34,4099-5.html

 

[Lukasz_10]

Let me rephrase that...will it be okay if I update my pre-built PC (Asus M32AD) current BIOS to the motherboard name BIOS (ASUS H81M-E) using a usb flash drive?

 

[NerdIT]

Let me rephrase that...will it be okay if I update my pre-built PC (Asus M32AD) current BIOS to the motherboard name BIOS (ASUS H81M-E) using a usb flash drive?

I would advise against it -you could possibly render some components useless. The second to latest BIOS "Version 0504", added support/compatibilty for PCIE devices (GFX cards, sound cards, and other things might not work if you do).

https://www.asus.com/us/Tower-PCs/M32AD/HelpDesk_Download/

Pick OS, then expand BIOS section, and you can see this.

 

[Calvin7]

The Asus M32AD computer does not use a retail boxed motherboard BIOS.

The latest BIOS for that model is BIOS version: 0802
https://www.asus.com/us/Tower-PCs/M32AD/HelpDesk_Download/

 

[Lukasz_10]

The problem is I would like to adjust my case fan speed settings and I cant under my current BIOS. It doesn't have an option to change the fan speed anywhere in it. Under the H81M-E default BIOS you can https://www.youtube.com/watch?v=OOki9wM8Zvc and it also has more features.
I heard replacing the BIOS chip can fix this issue. Will this work http://www.ebay.com/itm/BIOS-CHIP-ASUS-H81M-A-H81-PLUS-H81M-E-Z87I-PRO-B85-PRO-A55BM-A-USB3-/380685011112 ?

 

[Calvin7]

Your PC does not use a retail boxed motherboard. That model motherboard is readily available.
Asus H81M-E LGA 1150 U-ATX Motherboard
https://www.walmart.com/ip/31427535?wmlspartner=wlpa&selectedSellerId=0&adid=22222222227023351296&wl0=&wl1=g&wl2=c&wl3=40881571112&wl4=pla-78811882112&wl5=9005894&wl6=&wl7=&wl8=&wl9=pla&wl10=8175035&wl11=online&wl12=31427535&wl13=&veh=sem