GA-6BXC Rev 1.9?

I was given a computer with a GA-6BXC Revision 1.9 Board with a 400 Mhz
Celeron CPU. The only manual I can find online refers to Revision 2.0. I
have a PIII 650 Mhz I would like to put on this board but am not sure the
Revision 1.9 board will work with this CPU. I know the voltage requirements
for the two CPU's are different and am wondering if that is a problem with
this Revision 1.9 board. Any help would be greatly appreciated.

Thanks, Larry

LarryW wrote:
I was given a computer with a GA-6BXC Revision 1.9 Board with a 400
Mhz Celeron CPU. The only manual I can find online refers to Revision
2.0. I have a PIII 650 Mhz I would like to put on this board but am
not sure the Revision 1.9 board will work with this CPU. I know the
voltage requirements for the two CPU's are different and am wondering
if that is a problem with this Revision 1.9 board. Any help would be
greatly appreciated.

Thanks, Larry

Larry,

Gigabyte only shows Coppermine CPU support for 6BXC's at revision 2.0 or
higher.

http://www.giga-byte.com/MotherBoard...ech_cumine.htm

However, here's where it gets interesting - your Rev 1.9 motherboard MAY
have the chip to supply the lower voltages needed for the Coppermine CPU's.
(My Rev. 1.9 6BXE board does, and it's been running a PIII-750 for years,
despite Gigabyte's list showing it won't work.) The voltage regulator chip
could be marked as a HIP6004BCB, or as a RC5051. It's located near the CPU
slot, and is a 20 pin chip. Also near a pair of coils, two switching
transistors and SW1, if you are into electronic parts.

If your 6BXC does have the proper voltage regulator chip, flash the BIOS to
the latest version before trying the PIII 650. Also, SW1 will need to be
changed from ON-OFF-ON-OFF to OFF-OFF-OFF-OFF to support the 100 MHz speed
of the CPU, up from 66 MHz. SW2 won't matter, since the clock multiplier is
locked in the CPU.

Other changes from Rev 1.9 to 2.0 - the addition of a set of jumpers to
supply more power to the AGP slot for high power graphics cards. (Voodoo3,
for example.) And the connectors for keyboard and mouse went from basic
black, to the more popular green and purple.

Hope this helps.
Bob.

"Bob" wrote in
:


Other changes from Rev 1.9 to 2.0 - the addition of a set of jumpers
to supply more power to the AGP slot for high power graphics cards.
(Voodoo3, for example.) And the connectors for keyboard and mouse
went from basic black, to the more popular green and purple.

Hope this helps.
Bob.



Bob, thanks very much for your response. I greatly appreciate it. I sent
you an e-mail via your Yahoo address.

Larry

The manual shows a maximum multiplier of 9.5.
Would your comments above imply then that I could run any processor
speed with a 9.5 multiplier or less?

And Do I have to stick to the 100 bus speed or could I also use a 133?

Thanks.


--
diogenes

On Mon, 10 Oct 2005 22:11:01 +0100, diogenes
wrote:


The manual shows a maximum multiplier of 9.5.
Would your comments above imply then that I could run any processor
speed with a 9.5 multiplier or less?


Every Intel cpu is multiplier locked, and it will boot with correct
speed anyway, - the bios multiplier is overruled.

Then the bios will make a post where it writed the speed on screen by
booting. This is by text strings contained in bios. If the bios does
not know the cpu, it cannot write the correct string maybe, but it is
of no importance to correct functionality. There are many programs
that tell actual speed. Cpu-z per example, aida32,...

I have run tualatin celeron 1300 (13x multiplier) on BX boards with
the slot-T adapter. No matter if the bios multiplier goes to 7x or 9x
or whatever.

And Do I have to stick to the 100 bus speed or could I also use a 133?


BX chipset has some limited capabilities there. It can provide a 1/4
divider for pci, so correct pci bus speed og 133/4 can be obtained.
But it cannot provide an agp divider of 1/2. 133/2 =66 which is normal
agp speed. So agp will run 2/3 x 133 = 89 Mhz and this is 33%
overclocking of the agp port. Many graphics cards can stand that well,
per example voodoo3.
The BX boards does not have any better than agp 2x, so most modern agp
cards cannot be used.

I have run some BX motherboards at fsb124 with voodoo3 graphics. They
can even follow up to agp speed of 100 MHz with improved cooling. So I
have run 12x124 on a BX board.

Normally you need a beta bios with the coorect cpu code to tualatin or
for coppermines.

Lunchbox is a good place to look.
http://www.geocities.com/_lunchbox/links.html

best regards

John