kanecvr wrote:

None of these socket A boards actually use the 4 pin 12v plug for the CPU. They run the CPU off the ATX connector, witch is why it's very important you get a PSU with a strong 5v rail regardless if the board has the 4 pin CPU connector or not.

So very true that!

I remember working on a PC for somebody that had a Socket A board with a dead PSU. They wanted me to install an older really cheap looking PSU as a temporary stopgap measure, until they could get around to purchasing a new replacement. Against my better judgement I agreed and warned them to replace it within a few days at most - they ignored me and lo and behold a couple of weeks later the PSU and motherboard were toast. 🤣

kanecvr wrote:

Munx wrote:

Does this mean it still uses 5V for the CPU? The board is a Shuttle AK37 and I can't find much documentation on how its powered, so if someone ever came across this board and have any info on the CPU power, I'd be really appreciate it.

None of these socket A boards actually use the 4 pin 12v plug for the CPU. They run the CPU off the ATX connector, witch is why it's very important you get a PSU with a strong 5v rail regardless if the board has the 4 pin CPU connector or not.

That's not true, at least not for the Abit NF7-S. The reason why you can run boards without the 12V connector is that the 12V wire from the ATX connector are connected to the 12V connector on the board.

brassicGamer wrote:

Sweet find! If that board is LPX it shouldn't be too hard to find a compatible case. Hopefully. Try warming up the CPU with a hairdryer on the highest setting until you are able to twist the heatsink off.

Thanks! I'm Going to give that a try tonight and you just put me in the right direction on a case. I just need to find a cheap one now. 😀

Kamerat wrote:

Munx wrote:

...so I assumed it was really one of those rare 462 boards that power the PSU from the 12V rail (yay!). However after disconnecting the 4pin plug the PC booted up just fine anyway.

Does this mean it still uses 5V for the CPU? The board is a Shuttle AK37 and I can't find much documentation on how its powered, so if someone ever came across this board and have any info on the CPU power, I'd be really appreciate it.

If you got a multimeter you can try measuring the resistance between the 12V connector and the capasitors on the edge of the board (I guess the are for filtering on the 12V/5V side). Nice board BTW, I kind of like VIA chipsets.

Sadly I dont have a multimeter...
However I just thought of something - this board does have some nice OC features, so what I can do is underclock the CPU, reduce core voltage and see which rail starts looking heathyer in the bios menu...

Munx wrote:

Kamerat wrote:

Munx wrote:

...so I assumed it was really one of those rare 462 boards that power the PSU from the 12V rail (yay!). However after disconnecting the 4pin plug the PC booted up just fine anyway.

Does this mean it still uses 5V for the CPU? The board is a Shuttle AK37 and I can't find much documentation on how its powered, so if someone ever came across this board and have any info on the CPU power, I'd be really appreciate it.

If you got a multimeter you can try measuring the resistance between the 12V connector and the capasitors on the edge of the board (I guess the are for filtering on the 12V/5V side). Nice board BTW, I kind of like VIA chipsets.

Sadly I dont have a multimeter...
However I just thought of something - this board does have some nice OC features, so what I can do is underclock the CPU, reduce core voltage and see which rail starts looking heathyer in the bios menu...

I went and looked it up and the actual ATX Specification is as follows:
http://www.formfactors.org/developer%5Cspecs%5Catx2_2.PDF
Table 6. Voltage Tolerances
Voltage Rail Tolerance
+5VDC ± 5 %
-5VDC (if used) ± 10 %
+12VDC ± 5 %
-12VDC ± 10 %
+3.3VDC ± 5 %
+5VSB ± 5 %

So according to the specification your system's ATX voltage on the +12V rail of 11.77v is within specification tolerance. Minimum voltage for +12v is 11.40v Which means technically your system is functioning correctly and is within specifications, and there's probably nothing actually wrong with it.

I would run a monitoring software like AIDA64 or HwInfo that can read the system voltage inside windows though. If it drops below 11.4v during load (gaming or some such), then replace or consider servicing the power supply.

At a local flea market i found a 'Industrial CPU card'. Never saw one before, looks like a SBC.
Since it was just 5 euro's and came with a Pentium 120 and 233MMX i picked it up.

Only thing is, i have no clue what it is, or what it was used for. Only seems that people asking a lot of money on ebay for this mobo.

Any idea's? is it rare? And is it possible to use it as a small form dos pc?
Only use i would think of at this moment is that it would be perfect to test cpu's and ram.

Kamerat wrote:

That's not true, at least not for the Abit NF7-S. The reason why you can run boards without the 12V connector is that the 12V wire from the ATX connector are connected to the 12V connector on the board.

Yes, some s462 boards are in fact using the 12V rail from the main ATX 20-pin and/or 4-pin 12V. This also applies for some early s478 P4 boards. Btw - my dual socket 462 Tyan MB has two separate VRM sections where one is powered by 12V (socket #1) and the other one powered by 5V (socket #2). 😀

CmdKeen wrote:

At a local flea market i found a 'Industrial CPU card'. Never saw one before, looks like a SBC. Since it was just 5 euro's and […]
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At a local flea market i found a 'Industrial CPU card'. Never saw one before, looks like a SBC.
Since it was just 5 euro's and came with a Pentium 120 and 233MMX i picked it up.

Only thing is, i have no clue what it is, or what it was used for. Only seems that people asking a lot of money on ebay for this mobo.

Any idea's? is it rare? And is it possible to use it as a small form dos pc?
Only use i would think of at this moment is that it would be perfect to test cpu's and ram.

Don't you usually need a proprietary backplane for those things?

i thought so, but it has a six pin AT connector (bottom left).

CmdKeen wrote:

i thought so, but it has a six pin AT connector (bottom left).

The interface looks a lot like VESA but then lots of manufacturers upgraded the ISA bus by chucking an additional slot on the end. I've never seen an EISA backplane so it indeed looks 100% proprietary from some system with interchangeable cards or some kind of SMP setup. I mean yeah it says PCI but so what - it's in the wrong physical place so I guess they just mean the internal bus is PCI compliant. I don't think it can be powered independently of a backplane - that would be most odd (but no impossible).

The reason these things are listed for such high prices is that some industrial equipment from this era (e.g. CNC machines) are still operational today. So when components fail, businesses are usually willing to pay through the nose to get their kit up and running again.

Nope, it's a very standard thing: google PICMG 1.0.

Bought a CVX4 Covox Speech thing clone. Vogons tuning edition!

hard1k wrote:

Nope, it's a very standard thing: google PICMG 1.0.

I had thought it was VLB actually.

https://soundcloud.com/user-919839499/sets/cv … d-playback-with

The Covox Speech Thing sounds much better than I thought it would!

brad1982_5 wrote:

Bought a CVX4 Covox Speech thing clone. Vogons tuning edition! http://i185.photobucket.com/albums/x305/bradg1982/CVX42.jpg http: […]
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Bought a CVX4 Covox Speech thing clone. Vogons tuning edition!

TheAbandonwareGuy wrote:

hard1k wrote:

Nope, it's a very standard thing: google PICMG 1.0.

I had thought it was VLB actually.

VLB was pretty much a hack job spec just like PICMG. So, they used the same hack job design techniques. Like flipping an MCA connector around and using it for a different bus.

Cyrix200+ wrote:

I got these nice parts:
Powerleap PL-iP3/T with Tualeron 1.2GHz

Funny you mention such an adapter.

I have an Abit BE6 motherboard stashed away in a case that's only slightly newer than it, and it has a bare circuit board slotket adapter, fitted with a 1GHz Celeron-128. I don't know what sort of bus over or underclocking was going on with that setup, but I think it was kind of bad all around. I also had a Geforce 2 GTS-V 32MB, that should still be in the system, which is possibly somewhere in the garage.

xplus93 wrote:

TheAbandonwareGuy wrote:

hard1k wrote:

Nope, it's a very standard thing: google PICMG 1.0.

I had thought it was VLB actually.

VLB was pretty much a hack job spec just like PICMG. So, they used the same hack job design techniques. Like flipping an MCA connector around and using it for a different bus.

None the less, I simply love VLB. To me it is just as nice as a K6-II/III system. PCI and ISA are nice technologies, yet there is something really special that I can not put my finger on, when building and using a VLB system. I know that you are better off performancewise, using PCI compared to VLB, so I guess it all comes down to nostalgia and fun memories from back in 1993/95.

@ brad1982_5 , Cyrix200+

here is an archive for your enjoyment with many mods + FT2 , it includes those in soundcloud as well: http://www.mediafire.com/file/zhzcr05uvwbnwwb/ft2_mods.zip

hard1k wrote:

Nope, it's a very standard thing: google PICMG 1.0.

Interesting! Well, seconds before I saw this post I found this:

https://www.indiamart.com/hs-electronics-than … /backplane.html

PCI chucked on the end of ISA, basically.

brostenen wrote:

xplus93 wrote:

TheAbandonwareGuy wrote:

I had thought it was VLB actually.

VLB was pretty much a hack job spec just like PICMG. So, they used the same hack job design techniques. Like flipping an MCA connector around and using it for a different bus.

None the less, I simply love VLB. To me it is just as nice as a K6-II/III system. PCI and ISA are nice technologies, yet there is something really special that I can not put my finger on, when building and using a VLB system. I know that you are better off performancewise, using PCI compared to VLB, so I guess it all comes down to nostalgia and fun memories from back in 1993/95.

I agree, I love the hacks. VLB was never supposed to be a long-term solution. https://en.wikipedia.org/wiki/VESA_Local_Bus#Limitations