Bimmber (OP)
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January 23, 2018, 02:35:57 PM |
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P00P135
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January 23, 2018, 05:26:41 PM |
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Was that just an old 160w pico? Think you need one of the newer 200-250w pico's to be able to power anything more than a hard drive and normal motherboard. I think that molex connection sucked too much juice and just smoked the low watt pico.
Not old, brand new. 160w is more than enough. My cpu is only 54w and ssd 2w. Mobo takes 10-30w only. If you read PICO distributors response, it says I plugged molex in wrong place. No those molex are not power outputs, they are extra power inputs to power the pcie x1 if you don't use powered risers. You don't need to even connect them if you are using power risers, but some people claim the mobo doesnt boot unless there is a power connected to these molex connectors. |
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P00P135
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January 23, 2018, 06:05:42 PM |
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Yeah dood! enhance the power of your graphics with these two molex, they plug right into your gpu's for extra power when you need it the most!  |
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Bimmber (OP)
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January 23, 2018, 06:07:43 PM |
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P00P135
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January 23, 2018, 06:17:35 PM |
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No where does it say "output", this is just your interpretation which is 101% wrong. |
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Bimmber (OP)
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January 23, 2018, 06:19:40 PM |
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Corsa1r
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January 23, 2018, 06:33:42 PM |
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No, plugging in extra molex from psu actually helps motherboard give auxiliary power to graphics cards, because it can't supply everything itself.
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Bimmber (OP)
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January 24, 2018, 07:15:15 PM |
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Got another brand new PICO delivered today, did not plug in Molex into mobo, but result is same - burned again! Sparks, smoke and smell. What on earth is going on?! Where is a problem? |
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Prelude
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January 24, 2018, 07:50:07 PM |
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Response from PICO distributor:
Oh dear. I can immediately see what is wrong here.
In image 2 the *output* of the picoPSU is connected to the motherboard AUXPWR1 – which is also an output!
According to the manual for your TB250-BTC this is an auxiliary power connection (to give additional power to) graphics cards. i.e. power goes into motherboard through the ATX connector, and comes out here.
Hopefully this hasn’t damaged the motherboard. It has obviously damaged the picoPSU.
FWIW the output you connected is to power a hard drive or similar device.
That is NOT the issue at all. As soon as I saw your pics I thought "fuck, hope he hasn't powered that on yet.." and then scrolled through and saw you scrapped 2 PICOs. You're feeding the pico power from a PCI-e 6 pin connector on the breakout board. The pico's input connector is NOT a PCI-e connector, it's a CPU connector. You managed to make it fit in there, but it's polarity is reversed. Compare it to your actual PCI-e connectors, you'll see that the yellow cables are on the bottom, and black is on top. You've just sent 12V to ground, and ground to 12V to your poor picos. If you can cram the next pico's 4 pin connector upside down into a 6 pin, you'll be fine. |
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fanatic26
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January 24, 2018, 07:52:22 PM |
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Depending on what kind of pci-e risers you got, you might need 5V from the server psu. I had old risers (006C?) that only had a molex connector, this is because gpu's need 5V for start signal as i understood. The better model of pci-risers has this 12V -> 5V voltage transformation built in, and therefore only requires 12V on a 6pin pci-e connector.
Risers do not need 5v. I run a PICO setup and I also have PCIE to 3 molex adapters to power the cards. Everything is powered by 12v only. |
Stop buying industrial miners, running them at home, and then complaining about the noise.
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fanatic26
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January 24, 2018, 07:55:01 PM |
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No those molex are not power outputs
No, they are outputs. You are reading it wrong. They are not power outputs, they help supplement power to the PCIE ports on the board. |
Stop buying industrial miners, running them at home, and then complaining about the noise.
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Bimmber (OP)
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January 24, 2018, 07:56:23 PM |
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That is NOT the issue at all. As soon as I saw your pics I thought "fuck, hope he hasn't powered that on yet.." and then scrolled through and saw you scrapped 2 PICOs.
You're feeding the pico power from a PCI-e 6 pin connector on the breakout board. The pico's input connector is NOT a PCI-e connector, it's a CPU connector. You managed to make it fit in there, but it's polarity is reversed. Compare it to your actual PCI-e connectors, you'll see that the yellow cables are on the bottom, and black is on top. You've just sent 12V to ground, and ground to 12V to your poor picos.
If you can cram the next pico's 4 pin connector upside down into a 6 pin, you'll be fine.
I have checked with multi meter, +12v comes out from breakout board where black & yellow cables are connected from PICO. PICO`s 4 pin connector fits perfectly into 6 pin breakout board connector, did not have to force it, but it only fits in on one side due to shape of connector. I tried following - just PICO on its own, not plugged into mobo, powered on HP psu - no sparks, no smoke, no smell, runs like a dream! If you plug it into mobo and plug 4 pin into mobo, bang, fire! To me, it indicates BB is giving correct + & - to power PICO. I also checked with multi meter what comes out from PICO 4 pin which I plug into mobo, its +12v. |
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Bimmber (OP)
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January 24, 2018, 08:12:33 PM |
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Bimmber (OP)
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January 24, 2018, 08:23:54 PM |
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Prelude, I think you were right....!!! I forced 4 pin into BB 6 pin other way around, plugged 4 pin from PICO into mobo power and powered up, it works, cpu fan spins, no fire, no smoke, no smell....!!!
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Prelude
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January 25, 2018, 12:47:34 AM |
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Prelude, I think you were right....!!! I forced 4 pin into BB 6 pin other way around, plugged 4 pin from PICO into mobo power and powered up, it works, cpu fan spins, no fire, no smoke, no smell....!!!
I'm definitely right.  Your multi-meter picture shows you are reading the voltage improperly. You have your red probe on the black wire, and black probe on the yellow wire. If you'd have put red on yellow and black on black, you'd have seen -12V. Thankfully you didn't fry the motherboard etc! |
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P00P135
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January 25, 2018, 02:42:49 AM |
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or a properly wired 6pin to CPU 8pin to plug directly into the motherboard and avoid the pico 4pin plug altogether. |
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Bimmber (OP)
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January 25, 2018, 07:42:41 AM |
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I'm definitely right. 101%  Your multi-meter picture shows you are reading the voltage improperly. You have your red probe on the black wire, and black probe on the yellow wire. If you'd have put red on yellow and black on black, you'd have seen -12V. Yes, you are correct, it shows -12v Thankfully you didn't fry the motherboard etc!
I might have  I get nothing on the monitor, it says no signal for 3 seconds, then monitor light just flashes and black screen Or it could be PICO. I`m getting ATX psu from local shop today to try. |
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bigjee
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January 26, 2018, 05:57:26 PM |
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