SETBLASTER wrote on 2023-09-03, 04:13:

This is the revision 2.9 motherboard, sadly those 2 jumpers were added by gigabyte on revision3.

Gigabyte engineers had a clouding of their minds.
Two voltage sources are not connected in parallel, only current sources are connected in parallel. 🙁
For normal operation, it is necessary to remove the linear regulator (remove it completely) and direct apply a voltage of 3.3V from the ATX connector.

shevalier wrote on 2023-09-03, 04:55:

Gigabyte engineers had a clouding of their minds.
Two voltage sources are not connected in parallel, only current sources are connected in parallel. 🙁
For normal operation, it is necessary to remove the linear regulator (remove it completely) and direct apply a voltage of 3.3V from the ATX connector.

Same issue with the GA-5AX 5.2 - if the two jumpers are connecting ATX 3.3V and the 3.3V onboard regulator´s output the onboard regulator is getting even hotter than if the jumpers are seperating the two sources and the onboard regulator takes over completely.

shevalier wrote on 2023-09-03, 04:55:

Gigabyte engineers had a clouding of their minds. Two voltage sources are not connected in parallel, only current sources are co […]
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SETBLASTER wrote on 2023-09-03, 04:13:

This is the revision 2.9 motherboard, sadly those 2 jumpers were added by gigabyte on revision3.

Gigabyte engineers had a clouding of their minds.
Two voltage sources are not connected in parallel, only current sources are connected in parallel. 🙁
For normal operation, it is necessary to remove the linear regulator (remove it completely) and direct apply a voltage of 3.3V from the ATX connector.

so true!
the board is beautiful, i can´t understand how gigabyte engineers messed something like this in so many models.
Glad you could explain me this with a picture. I just have a couple questions:

1) how did you figure out the correct regulator is that one in the picture for AGP?, (and not the one on the left of the Orange heatsink ).
2) (thanks for telling to remove the regulator completely and soldering a cable to the middle pin), Did you have the same board with the same problem in the past?

SETBLASTER wrote on 2023-09-03, 05:47:

1) how did you figure out the correct regulator is that one in the picture for AGP?, (and not the one on the left of the Orange heatsink ).
2) (thanks for telling to remove the regulator completely and soldering a cable to the middle pin), Did you have the same board with the same problem in the past?

BX is quite simple board. Vcpu+Vtt+V2.5V near the slot/socket.
AGP+RAM+Chipset (+PCI - optional) that`s powered from 3.3V
Wire instead of LX8383 is standard procedure for boards SS7 till MVP3/Aladdin

PS. The reverse problem is much more interesting - installing a regulator on the CUBX to regulate the RAM voltage.
Before
download/file.php?id=165413&mode=view
after
download/file.php?id=166213&mode=view

PPS It's faster to check with a multimeter than to wait for "independent confirmation from 3 sources".

cut&paste from some earlier AT design

rasz_pl wrote on 2023-09-03, 13:46:

cut&paste from some earlier AT design

Yep.
Add jumper "Vio +0.1V"
And now this is not a bug, but a feature.

shevalier wrote on 2023-09-03, 08:50:

BX is quite simple board. Vcpu+Vtt+V2.5V near the slot/socket. AGP+RAM+Chipset (+PCI - optional) that`s powered from 3.3V Wire […]
Show full quote

SETBLASTER wrote on 2023-09-03, 05:47:

1) how did you figure out the correct regulator is that one in the picture for AGP?, (and not the one on the left of the Orange heatsink ).
2) (thanks for telling to remove the regulator completely and soldering a cable to the middle pin), Did you have the same board with the same problem in the past?

BX is quite simple board. Vcpu+Vtt+V2.5V near the slot/socket.
AGP+RAM+Chipset (+PCI - optional) that`s powered from 3.3V
Wire instead of LX8383 is standard procedure for boards SS7 till MVP3/Aladdin

thanks shevalier! Oh by the way, is it really neccesary to connect the wire to all 3 pins in the PSU connector? or only to 1 pin is enough in the PSU connector?

i just learned yesterday that this GA-6BA revision2.9 has ANOTHER problem from gigabyte hahaha.

Aparently they mention that the maximum CPU you can put in it is 550mhz but then they released a new bios mentioning that it can go up to 1.1G only if you have revision 3.0 of the motherboard and an Adapter PGA370 (Socket 370) to Slot 1.

( i wonder if they are talking about an PGA370 adapter that already has regulator in it, or a PGA370 adapter without a regulator in the pcb (cheap ones). But i would not be able to try because my board version is 2.9. Or do you know there could be a fix for that too on my 2.9 board so i can use a 1GHz cpu with a an adapter?

picture:

SETBLASTER wrote on 2023-09-03, 14:55:

is it really neccesary to connect the wire to all 3 pins in the PSU connector? or only to 1 pin is enough in the PSU connector?

if it were possible, ATX would be called ATX18 pin and sold for the same money.

SETBLASTER wrote on 2023-09-03, 14:55:

i just learned yesterday that this GA-6BA revision2.9 has ANOTHER problem from gigabyte hahaha.

Gigabyte is not sure that this revision of the board will work on the 133 bus.
Maybe this is due to the fact that the clock IC does not support this frequency, or the layout of the board may not be very successful.
Usually a 440BX with 2 RAM sticks starts up on bus 133.

Bad luck, sorry
https://pdf1.alldatasheet.com/datasheet-pdf/v … 280PVC-11S.html
100MHz only

SETBLASTER wrote on 2023-09-03, 14:55:

thanks shevalier! Oh by the way, is it really neccesary to connect the wire to all 3 pins in the PSU connector? or only to 1 p […]
Show full quote

shevalier wrote on 2023-09-03, 08:50:

BX is quite simple board. Vcpu+Vtt+V2.5V near the slot/socket. AGP+RAM+Chipset (+PCI - optional) that`s powered from 3.3V Wire […]
Show full quote

SETBLASTER wrote on 2023-09-03, 05:47:

1) how did you figure out the correct regulator is that one in the picture for AGP?, (and not the one on the left of the Orange heatsink ).
2) (thanks for telling to remove the regulator completely and soldering a cable to the middle pin), Did you have the same board with the same problem in the past?

BX is quite simple board. Vcpu+Vtt+V2.5V near the slot/socket.
AGP+RAM+Chipset (+PCI - optional) that`s powered from 3.3V
Wire instead of LX8383 is standard procedure for boards SS7 till MVP3/Aladdin

thanks shevalier! Oh by the way, is it really neccesary to connect the wire to all 3 pins in the PSU connector? or only to 1 pin is enough in the PSU connector?

i just learned yesterday that this GA-6BA revision2.9 has ANOTHER problem from gigabyte hahaha.

Aparently they mention that the maximum CPU you can put in it is 550mhz but then they released a new bios mentioning that it can go up to 1.1G only if you have revision 3.0 of the motherboard and an Adapter PGA370 (Socket 370) to Slot 1.

( i wonder if they are talking about an PGA370 adapter that already has regulator in it, or a PGA370 adapter without a regulator in the pcb (cheap ones). But i would not be able to try because my board version is 2.9. Or do you know there could be a fix for that too on my 2.9 board so i can use a 1GHz cpu with a an adapter?

picture:

Your board should easily support a 100MHz FSB skt 370 coppermine on a decent slot1 adapter, to at least 800MHz (possibly 850MHz too) - beyond that (1.0 / 1.1GHz) it may work but with increased chance of instability.

I'm currently running an 800MHz cpu + ABIT SlotKET !!! adapter on my revision 2.5A board (F1 BIOS) and 1 gig of memory, and its completely stable

PC Hoarder Patrol wrote on 2023-09-04, 01:52:

Your board should easily support a 100MHz FSB skt 370 coppermine on a decent slot1 adapter, to at least 800MHz (possibly 850MHz too) - beyond that (1.0 / 1.1GHz) it may work but with increased chance of instability.

I'm currently running an 800MHz cpu + ABIT SlotKET !!! adapter on my revision 2.5A board (F1 BIOS) and 1 gig of memory, and its completely stable

thank you for letting me know of this. Its nice to know that someone else has the same board running better than what gigabyte says its the maximum for a certain revision.
Because according to them if you have revision lower than 3.0 you are stuck with katmai, and gigabyte says coppermine are only for slockets + revision3.

That abit sloket is one of the good ones. The market was plagued with no brand ones. I happen to have some with no brand, and i got i think a good one fron gigabyte: ga-6r7pro . Maybe that one works with a 800MHz pentium3.

PC Hoarder Patrol, did you mod it to make voodoo3 work properly like what was posted some messages before in this topic?

I always wanted to know what is better, this GA-6BA board or a soyo SY-6BB, because according to soyo you can only reach katmai 600mhz on the soyo. But some people say they could install higher cpus.

SETBLASTER wrote on 2023-09-04, 03:23:

thank you for letting me know of this. Its nice to know that someone else has the same board running better than what gigabyte s […]
Show full quote

thank you for letting me know of this. Its nice to know that someone else has the same board running better than what gigabyte says its the maximum for a certain revision.
Because according to them if you have revision lower than 3.0 you are stuck with katmai, and gigabyte says coppermine are only for slockets + revision3.

That abit sloket is one of the good ones. The market was plagued with no brand ones. I happen to have some with no brand, and i got i think a good one fron gigabyte: ga-6r7pro . Maybe that one works with a 800MHz pentium3.

PC Hoarder Patrol, did you mod it to make voodoo3 work properly like what was posted some messages before in this topic?

I always wanted to know what is better, this GA-6BA board or a soyo SY-6BB, because according to soyo you can only reach katmai 600mhz on the soyo. But some people say they could install higher cpus.

Gigabyte official company support and reality did start to drift somewhat by the coppermine & slot1 / adapter era - as I recall the user chatter around increased support was such that their tech support bods decided to issue a whole series of final BIOS updates for their BX series (including F1 for the GA-6BA) to extend this support to late revision boards but, as it turned out, they worked pretty well on earlier revisions as well.

Although I never tested it back in the day with my original GA-6BA (went straight from it + PII 450MHz to an ABIT SA6R + PIII 1GHz) I thought it would be worth trying with my current board. I do have 850 & 1 gig 100MHz fsb chips I always meant to try, but never did. Your 6R7Pro shold be ideal for the job.

This is a good link to see what users were saying about the board at the time (seems some had gotten slot1 coppermines and 1 gig skt 370s to work as well - https://groups.google.com/g/alt.comp.periphs. … te/search?q=6ba )

As far as Voodoos go, no I never did the voltage mod (think original was running a Matrox G200 and my current one an ATI Radeon 8500)