L3+ Breakout Board: Will this work?

[Stockypotty]

Hi all,

So i've bought this breakout board for my 1200w HP server: http://www.parallelminer.com/product/breakout-board-adapter-compatible-with-hp-1200-watt-dps-1200fb/

In order to power a L3+ miner that needs 9 PCI-E connectors. I think i'm right in saying that I need to use this type of PCI-E cable: http://www.parallelminer.com/product/26in-pci-e-cable-made-of-high-quality-14-awg-stranded-copper/

As there are limited slots on the breakout board. Miner requires 800w to power.

However, it's a nightmare trying to find the above cable in the UK. So I was wondering if I could use a 'standard' PCI-E cable: http://www.parallelminer.com/product/24-inch-16awg-6-pin-male-to-8-pin-62-male-pcie-power-cable/

And fit 6 leads into one slot on the breakout board like:

https://imgur.com/n3P9SDS

Is this possible?

Any help would be greatly appreciate thank you.

[1715010458]

1715010458

[bathrobehero]

You have the same link for the different PCI-E cables.

[Stockypotty]

You have the same link for the different PCI-E cables.

Ah yes sorry! Fixed now thanks.

[bathrobehero]

I don't have ASICs but I don't see any issues with your setup as long as you plug each of the 12V leads into different slots on the breaker (like on the pic but with 9+9) and if you properly cut and prepare the leads.

Basically, the L3+ apparently has 4 boards each of which requiring 2 x 12V PCI-E connections (and the 9th to power the controller board). So essentially 800w/8 =100 watts per 12V PCI-E which is 8.3 amps and 16AWG wires are rated much higher than that (16A maybe?).

Maybe others can chip in as well.

[Stockypotty]

Cool thanks a bunch! Yeah sounds like in theory it could work but I don't know enough about this stuff to say for sure.

But yeah as you say, 9 negative (3 leads in one slot) + 9 positive (3 leads in one slot) - in theory might work?

Thanks again, any other input would be great. I'm also struggling to find the proper forum / place for this question!

Greatly appreciated thanks.

[bathrobehero]

You need 1 lead going into 1 slot. You won't be able to fit 3 leads (3x1.291mm diameter) into the breaker as it can only handle wires up to 14 AWG (1.628mm diameter).

The first PCI-E cables you linked only have 2 wires so those two should be enough.

https://allpinouts.org/pinouts/connectors/power_supply/pci-express-pcie-6pin-power/

[Stockypotty]

Shit ok, so won't be able to put 3 wires into one 'slot / hole'... damn. Ok back to the drawing board I guess!

Thanks

[bathrobehero]

Shit ok, so won't be able to put 3 wires into one 'slot / hole'... damn. Ok back to the drawing board I guess!

Thanks

It should be all good though, just remove the other 4 cables from the 6 of the PCI-E, you can see the difference (6 vs 2 wires):




So only the middle two wires matter, the rest doesn't need to be plugged in.

[Stockypotty]

Ah right, I thought the 2 lead one was thicker or something and so could provide more power. But you reckon it's just the same but only 2 leads? Guess that makes sense...

[bathrobehero]

I believe so since the 2-wire cables are advertised to be working with popular ASICs.

[Stockypotty]

Damn. Ok solid point, will check it out and make sure there's enough power if I just used two leads per connector. Just thought they were separate leads somehow. But would make my life a lot easier if they're the same type just with fewer leads!

Thanks for all your help buddy

[gt_addict]

If you can wait why dont you buy one from a member on here called "sidehack" he makes breakout boards to fit the dos server psus with 12 6pin connectors on. I have two of them. Great baords and great quality. You could also try www.bitshopper.de as he stocks the boards made by sidehack in his store. I bought mine and associated cables from there.

Link to the shop:-

https://www.bitshopper.de/shop/?lang=en

Also DONT reduce the number of cables per 6pin plug, you are asking for trouble (fire) if you overload a single wire.

[Stockypotty]

Fuuuuck didn't realise this place existed!!!!!! I would have but already have the breakout boards being delivered.

Just need to work out how to power them properly via PCI-E - but sounds like I can just use standard 6 pin PCI-E cables and only use 2 of the wires on each...

thanks though!

[polymer_city]

I am making my PCI cables for server supplies with only 2 cables each plug using 1.5mm2 cable.

I have 27 sets to make for the new setup! 

I wasted so much time making 6 cable plugs it rediculous!

As long as the cable rating is well over what each plug is supplying the 2 pin cables will be fine.

[Stockypotty]

I see thanks buddy! So i'm thinking of just buying these (as they're the cheapest I can find atm): https://www.amazon.co.uk/DeLOCK-82924-15-pin-PCI-Warranty/dp/B0057A8TNS/ref=sr_1_33?ie=UTF8&qid=1506351070&sr=8-33&keywords=pcie+power+cable

Cutting the end off, stripping the wire a bit so I can attach to the breakout board, and potentially take the 4 wires out leaving just 2, and connecting the 2 wires to the breakout board.

Seems like it will provide enough watts / amps for each board... so I might just try it and see considering I got the breakout boards coming potentially today or tomorrow...

Think that sounds ok?

Thanks for your input!