I've recently been tring to get an old abit bf6 to work but for some reason it crashes specifically only in the bios when i look at cpu temp.
Ive flashed it , repasted the cpu , reflowed the mobo , swapped the ram , cleared the cmos but it hasn't helped
Any ideas?
check to see if windows/linux/whatever os you want to run on it works ok, run some benchmarks and ignore the bios health page.
other option would be to find out which sensors the board uses and verify they're still on the board/functioning/connected.
or flash a newer/older bios on it.
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Got a vague memory that this plagued some folks back in the day, but don't recall cause or solution. Maybe searching some longlived forums like Anandtech or overclockers might find some clues.
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BitWrangler wrote on 2022-04-18, 15:59:Got a vague memory that this plagued some folks back in the day, but don't recall cause or solution. Maybe searching some longlived forums like Anandtech or overclockers might find some clues.
Definitely worth some creative googleing, yes.
And, my suspicion, if it has any logical reason at all:
Something to be displayed in the hardware monitor causes an alarm or gets a sensor value that does not compute because the software doesn't expect it.
Typical suspects: CPU fan not detected - fan without a speed signal or one with too few RPM because it's to large/modern to register, running below maybe 2000 RPM.
Maybe some very low CPU or ambient temperature does not compute.
If Windows is running, maybe install some diagnostic software provided by Abit or generic like this:
https://en.wikipedia.org/wiki/Motherboard_Monitor
Check the vales there for plausibility.
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okay i figured out the problem , the psu was bad , it showed -60v on the -5v rail and gave some super odd readings , i swapped it with a crappy old codegen psu and now the bios health works fine.
It sucks cause it was a nice old compaq dps psu with good brand caps.
Hopefully i havent fried anything.
AppleSauce wrote on 2022-04-18, 16:13:okay i figured out the problem , the psu was bad , it showed -60v on the -5v rail and gave some super odd readings , i swapped it with a crappy old codegen psu and now the bios health works fine.
It sucks cause it was a nice old compaq dps psu with good brand caps.
Hopefully i havent fried anything.
-60 V or 60 V is a matter of definition and -60 V would have meant that along with +12 V you would have had 72 V on you motherboard.
If that was for real, it would be toast now.
Therefore, that must have been bogus, but barely beside the tolerance. Which would support my hypothesis that the bios could not handle the value...
A, no offense, but let's be real about it, "crappy old computer" should be perfectly fine with a crappy old psu as long as that supplies power. Of course, it's alway nice to have original gear, I get your point.
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Most likely the -5V value was bogus. Some boards display nonsense if a voltage isn't present. I assume your new PSU was missing -5V causing BIOS to glitch/crash when trying to read the value.
The PSU may be completely fine.
Doornkaat wrote on 2022-04-18, 16:38:Most likely the -5V value was bogus. Some boards display nonsense if a voltage isn't present. I assume your new PSU was missing -5V causing BIOS to glitch/crash when trying to read the value.
The PSU may be completely fine.
I just checked and you are right the psu has no -5v.
The fact that a motherboard could lockup because of value not being available seems like a massive oversight on the ABIT's part.
Is there any workaround for this problem other than not using the bios health check?
Doornkaat wrote on 2022-04-18, 16:38:Most likely the -5V value was bogus. Some boards display nonsense if a voltage isn't present. I assume your new PSU was missing -5V causing BIOS to glitch/crash when trying to read the value.
The PSU may be completely fine.
Beyond tolerance, or absent, yes.
I assumed it was an AT PSU, romantic that I am. 😉
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hehe, seeing that that is an ATX board, it's rather normal to have an ATX supply attached to it 😉
Those are not supposed to have -5 at all, there's no pin for it.
Bios bug, I'd say, legacy oversight.
Do you need the health monitor? There are at least windows tools that do the same.
And probably DOS ones I don't know about.
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Cuttoon wrote on 2022-04-18, 16:48:hehe, seeing that that is an ATX board, it's rather normal to have an ATX supply attached to it ;) […]
hehe, seeing that that is an ATX board, it's rather normal to have an ATX supply attached to it 😉
Those are not supposed to have -5 at all, there's no pin for it.
Bios bug, I'd say, legacy oversight.
Do you need the health monitor? There are at least windows tools that do the same.
And probably DOS ones I don't know about.
Some of my other atx psus do have a -5v rail.
I don't realllllly need health monitor but it triggers my ocd that it wont work.
I've also noticed that sometimes the bios wont open if i press the del key too early , and im generally just worried about instability.
But i guess if it doesn't cause any serious issues i can ignore it.
Cuttoon wrote on 2022-04-18, 16:48:hehe, seeing that that is an ATX board, it's rather normal to have an ATX supply attached to it 😉
Those are not supposed to have -5 at all, there's no pin for it.
You're wrong. The first specifications did have -5v.
Right to repair is fundamental. You own it, you're allowed to fix it.
How To Ask Questions The Smart Way
Do not ask Why !
https://www.vogonswiki.com/index.php/Serial_port
Cuttoon wrote on 2022-04-18, 16:48:hehe, seeing that that is an ATX board, it's rather normal to have an ATX supply attached to it ;) […]
hehe, seeing that that is an ATX board, it's rather normal to have an ATX supply attached to it 😉
Those are not supposed to have -5 at all, there's no pin for it.
Bios bug, I'd say, legacy oversight.
Do you need the health monitor? There are at least windows tools that do the same.
And probably DOS ones I don't know about.
Original/early ATX boards and PSUs did have -5V. Haven't checked the specs, but it must have been official in at least the first revision. I have a few ATX power supplies with -5, it's always a white wire, so easy to spot.
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AppleSauce wrote on 2022-04-18, 15:41:it crashes specifically only in the bios when i look at cpu temp.
I saw an identical effect on my Gigabyte 7IXE. I eventually tracked this down to the ATX PSU I was using not providing -5V as when I used an old ATX PSU with -5V all was OK.
In the end I used a pair of resistors to provide -5 from -12 and all is now OK, see Re: upgrading a PC with GA-7IXE motherboard and need help choosing CPU and other components
red-ray wrote on 2022-04-18, 17:03:AppleSauce wrote on 2022-04-18, 15:41:it crashes specifically only in the bios when i look at cpu temp.
I saw an identical effect on my Gigabyte 7IXE. I eventually tracked this down to the ATX PSU I was using not providing -5V as when I used an old ATX PSU with -5V all was OK.
In the end I used a pair of resistors to provide -5 from -12 and all is now OK, see Re: upgrading a PC with GA-7IXE motherboard and need help choosing CPU and other components
Would something like the isa slot voltage blaster fix the problem as well?
I'm not going to really have a use for the isa slot on this board so maybe i could use that if the slot isn't shared?
debs3759 wrote on 2022-04-18, 17:01:Cuttoon wrote on 2022-04-18, 16:48:hehe, seeing that that is an ATX board, it's rather normal to have an ATX supply attached to it ;) […]
hehe, seeing that that is an ATX board, it's rather normal to have an ATX supply attached to it 😉
Those are not supposed to have -5 at all, there's no pin for it.
Bios bug, I'd say, legacy oversight.
Do you need the health monitor? There are at least windows tools that do the same.
And probably DOS ones I don't know about.Original/early ATX boards and PSUs did have -5V. Haven't checked the specs, but it must have been official in at least the first revision. I have a few ATX power supplies with -5, it's always a white wire, so easy to spot.
OK, OK, now that three people have told me, I should believe it. Don't know very much about such modern systems! 😉
Should be an relatively easy fix via some voltage regulator at the -12 V?
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I mean i could mod it as long as someone would tell me how to do it.
red-ray mentioned using resistors but his thread didn't seem to have any info on how he did it.
AppleSauce wrote on 2022-04-18, 17:27:Would something like the isa slot voltage blaster fix the problem as well?
IDK, it's not an item I have used and know about. Given I had some resistors it took me 5 minutes to make the issue go away.
red-ray wrote on 2022-04-18, 17:45:AppleSauce wrote on 2022-04-18, 17:27:Would something like the isa slot voltage blaster fix the problem as well?
IDK, it's not an item I have used and know about. Given I had some resistors it took me 5 minutes to make the issue go away.
what are the blue tubes next to the resistors?
AppleSauce wrote on 2022-04-18, 17:59:what are the blue tubes next to the resistors?
Heat shrink to provide electrical insulation. The SIO chip now sees -5
