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Topic: 12 card rig, 3 server psu +PICO - page 2. (Read 686 times)

full member
Activity: 1123
Merit: 136
January 23, 2018, 12:26:41 PM
#22
Quote
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.
newbie
Activity: 210
Merit: 0
January 23, 2018, 09:35:57 AM
#21
Mine is asrock pro btc+ is it okay to not powerup the number 2 molex in the motehrboard? or is it advisable to powerup both?

Read few posts above.

Yeah, go ahead and plug in both molex cables Cheesy Cheesy Cheesy Cheesy Cheesy
newbie
Activity: 210
Merit: 0
January 23, 2018, 09:33:14 AM
#20
Quote
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.
hero member
Activity: 2100
Merit: 562
January 23, 2018, 09:32:00 AM
#19
Mine is asrock pro btc+ is it okay to not powerup the number 2 molex in the motehrboard? or is it advisable to powerup both?
full member
Activity: 139
Merit: 100
January 23, 2018, 09:30:51 AM
#18
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.


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.

I also smoked a 160w pico when i used the single molex to power a usb pci-e riser (rx560 with no 6pin). Fingers crossed that mobo survived!
full member
Activity: 1123
Merit: 136
January 23, 2018, 09:11:54 AM
#17
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.


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.
newbie
Activity: 210
Merit: 0
January 23, 2018, 08:23:33 AM
#16
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.
newbie
Activity: 210
Merit: 0
January 23, 2018, 07:54:45 AM
#15
Which one?
newbie
Activity: 29
Merit: 0
January 23, 2018, 07:52:50 AM
#14
Did you mess up connecting the power?  Lips sealed
Seems like you put minus on plus and plus on minus. How did you managed to do this?  Roll Eyes



https://imgur.com/IwfAmlp

When i take a look at my power supplies. At the lip side i got minus and the outside got plus. Just opposite around as you.
newbie
Activity: 210
Merit: 0
January 23, 2018, 07:48:36 AM
#13
I powered up server psu and sparks went on PICO Sad Sad Sad



https://i.imgur.com/SxPhMTR.jpg
newbie
Activity: 210
Merit: 0
January 23, 2018, 06:56:26 AM
#12
In a exact same setup like mine?
newbie
Activity: 29
Merit: 0
January 23, 2018, 06:55:49 AM
#11
OP. I have 20 rigs connected with server PSU and PICO's and never ran into problems.
newbie
Activity: 210
Merit: 0
January 23, 2018, 05:59:31 AM
#10
Thank you all for your help, fingers crossed it all works today and I see no sparks when I power it on Cheesy
member
Activity: 118
Merit: 10
January 23, 2018, 05:41:27 AM
#9
You could use the 4pin mobo from the Pico for your Mainboard. http://i57.tinypic.com/20horih.png
8pin is need, if maximal oc, and you plug gpu's direct on Board.
full member
Activity: 139
Merit: 100
January 23, 2018, 05:12:27 AM
#8
My riser:

009s

https://www.amazon.co.uk/gp/product/B077K28B6Y/ref=oh_aui_detailpage_o02_s00?ie=UTF8&psc=1

I don`t have 6 pin female to molex cable for that.

You only need 12V 6-pin male connectors from the psu then.
newbie
Activity: 31
Merit: 0
January 23, 2018, 04:59:59 AM
#7
I`m just wondering - my BB has 6 pins, but PICO input connector 4 pins - is that ok? My mobo has 8 pin power connector, but PICO 4 pin. Do you have same and it works?

My PICOs don't have an input connector like that, I have to modify them to work with a 6-pin PCIe connector.

It's okay as long as it's a 12V input PICO and you don't swap the polarity. Make sure you don't just look at the wire colors but actually check polarity with a multimeter because I actually got a number of PCIe power cables that have their wires swapped.

Quote
In what sequence you turn your psu`s on ?

I turn them on at the same time. I actually have this all on a switched PDU. Depending on how long your mainboard POSTs you should be good even if you don't power them on at the same time. It's safe to turn the card-only PSUs first as well.
newbie
Activity: 210
Merit: 0
January 23, 2018, 04:56:29 AM
#6
My riser:

009s

https://www.amazon.co.uk/gp/product/B077K28B6Y/ref=oh_aui_detailpage_o02_s00?ie=UTF8&psc=1

I don`t have 6 pin female to molex cable for that.
full member
Activity: 139
Merit: 100
January 23, 2018, 04:55:06 AM
#5
Hi,

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.

This is how i solved getting 5V from the 12V server psu's
https://bitcointalksearch.org/topic/m.28576837

This could also be a idea to feed the motherboard molex from the server psu instead of the pico-psu.
newbie
Activity: 210
Merit: 0
January 23, 2018, 04:39:02 AM
#4
I`m in Europe, 220v.

I`m just wondering - my BB has 6 pins, but PICO input connector 4 pins - is that ok? My mobo has 8 pin power connector, but PICO 4 pin. Do you have same and it works?

In what sequence you turn your psu`s on ?
newbie
Activity: 31
Merit: 0
January 23, 2018, 04:35:24 AM
#3
I run a very similar setup.

Depending on the algo and the card optimization (OC/DC) it should run that no problem.

On 220V that PSU runs 3x1080Ti + mainboard no issue. Don't know if you have 220V but I think it's 900W max on 110V which should be enough in theory if you optimize your cards.
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