VOGONS

Socket 478 mATX Intel chipset motherboards with underclocking?

Topic actions

First post, by Paar

Posted on 
User metadata
Rank Member
Rank
Member

Do you know about any mATX boards with socket 478 and an Intel chipset which can at least manipulate a FSB setting? For now I have tested Asus P4GE-MX and P4p800-VM and both are very limiting.

The former does contain an option to manipulate FSB but only from the default value up (e.g. put a 533Mhz Celeron D there and could put a value from 133 to 165 MHz FSB). The latter doesn't contain any underclocking at all.

Reading through manuals it seems that Asrock P4i65G and some Biostar boards with Intel 865 chipsets allow FSB manipulation but I don't want to buy any board in blind faith. Could someone confirm that I can put a 800MHz FSB CPU in there and underclock it with 400MHz FSB setting? Of course it would be nice if there were any board which could lower voltage as well but I have to be realistic - mATX boards in that era were mainly for OEMs and were very berebones.

Reply 1 of 4, by myne

Posted on 
User metadata
Rank Oldbie
Rank
Oldbie

If you want to spend an hour hunting through the cpu datasheet, in all probability there's a bsel pin that can be wired to power, or blocked to default it to 100fsb.

I built:
Convert old ASUS ASC boardviews to KICAD PCB!
Re: A comprehensive guide to install and play MechWarrior 2 on new versions on Windows.
Dos+Windows 3.11+tcp+vbe_svga auto-install iso template
Script to backup Win9x\ME drivers from a working install
Re: The thing no one asked for: KICAD 440bx reference schematic

Reply 3 of 4, by Paar

Posted on 
User metadata
Rank Member
Rank
Member

Thanks for suggestions, both are quite interesting. Didn't know about the SysTool, never was into overclocking but this could come handy for the other way around.

Bsel pin mod is also interesting and usable even in DOS.

But if there is a motherboard which can be set up through BIOS then I could get the most comfortable option without any sweat. Of course if there is such a board.

Reply 4 of 4, by Kruton 9000

Posted on 
User metadata
Rank Newbie
Rank
Newbie

Asus P4P800-VM can definitely be overclocked by software from Windows. There are no overclocking options in the BIOS. There is a custom BIOS firmware from AsusP4P800-MX, which has overclocking options, but it is raw and has annoying problems. This board officially supports Asus adapter for working with Pentium M.
AsRock P4i65g has overclocking options in the BIOS. What is especially interesting about this board is that it unofficially supports mobile P4 Prescott processors, including working SpeedStep and switching multipliers.
I have both of these boards, each of them has its pros and cons. In Asus, my USB controller on the south bridge burned out due to a known defect of these models.

Go to top of page Go to top of page
Back to General Old Hardware
Close window
Close window