How to power 16 Klondike K16s? | Bitcointalksearch.org

trigeek

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Quote from: Bitoy on July 15, 2013, 03:46:20 AM

Yes you can only power 2 x k16 with one 6 pin pcie. But a psu usually have 2 x 6 pin pcie so you can power a k64.

On another note.
How about an 8 pin pcie with 3 splitter to power 1 k64?

Yes, that will work. 6-pin connectors are rated to deliver 75W. 8-pin are rated to deliver 150W. Also note that these are nominal ratings- the physical connector is OK for more than double that. It would *probably* be safe to run three or four K16's off of a single 6-pin, but that will require some experimentation.

Lots more information here: http://www.tomshardware.com/reviews/power-supply-specifications-atx-reference,3061-12.html

Also, one of the most important things to look at when picking a PSU- make sure it is single rail. With cheap multi-rail power supplies, the current handling capability will be divided up across those rails, and maybe in ways that don't divide evenly by 32W.

Bitoy

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Quote from: Mabsark on June 20, 2013, 09:49:57 PM

Quote from: kendog77 on June 20, 2013, 08:11:03 PM

One pci-e lead from the power supply typically contains two pci-e connectors. A k64 contains four k16 boards, so one pci-e lead with two splitters can power one k64 board.

I believe what I originally said was correct.

I don't believe it can. A 6 pin PCIE cable has 3 x 12V lines providing 6.25A and a maximum wattage of 75W. A K16 uses 32W so you'd only be able to power 2 K16s from a PCIE cable.

Yes you can only power 2 x k16 with one 6 pin pcie. But a psu usually have 2 x 6 pin pcie so you can power a k64.

On another note.
How about an 8 pin pcie with 3 splitter to power 1 k64?

turtle83

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Quote from: ionstorm on July 14, 2013, 02:56:45 PM

ok I got a few psu's laying around but I am unsure how to power on the power supplies without a host pc, what I'd like to do is have a nexus 7 or netbook run cgminer, how do I switch the power supply on? is there a switch I can buy for this?

http://www.techpowerup.com/articles/other/22

ionstorm

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ok I got a few psu's laying around but I am unsure how to power on the power supplies without a host pc, what I'd like to do is have a nexus 7 or netbook run cgminer, how do I switch the power supply on? is there a switch I can buy for this?

turtle83

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Quote from: Bicknellski on June 28, 2013, 04:11:06 AM

Quote from: andrewsg on June 28, 2013, 03:35:38 AM

I would really like something like that for Klondikes, but a Lancelot uses less power and has a different power plug / lead, so I don't think it would work "out of the box".

This is a complete DIY solution... where has anyone found a out of the box solution for a Klondike array being powered? Please let me know. I think you are missing what this can do... has nothing to do with the "power" of the Lancelots... have a closer look. You can make these wires yourself order some PCI-e 6 to 8 pin or SATA wires I would hope... checking now to find something.

Quote

https://bitcointalksearch.org/topic/m.2441946

Im using these for my ztex boards : http://www.cardreaderfactory.com/shop/atx-to-lancelot-power-adapter.html

Basically u hook in atx to it and you have 20 pairs of 12v contacts, and bonus some 5v ones which i currently dont use, but will use to power USB hubs, raspberry pi. - Mr Turtle

I realized, my excitement over the adapter may have been immature, so maybe we need to rethink the adapter. When i hooked up more than 5 ztex quad, overnight the ATX PSU would auto shutdown. Did not have the time to investigate why that happens. Maybe it was not designed for ~40W per lead.... Once im back home, I will try using 2 leads per board and report back if im able to max out the ATX or not.

Bicknellski

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Quote from: andrewsg on June 28, 2013, 03:35:38 AM

I would really like something like that for Klondikes, but a Lancelot uses less power and has a different power plug / lead, so I don't think it would work "out of the box".

This is a complete DIY solution... where has anyone found a out of the box solution for a Klondike array being powered? Please let me know. I think you are missing what this can do... has nothing to do with the "power" of the Lancelots... have a closer look. You can make these wires yourself order some PCI-e 6 to 8 pin or SATA wires I would hope... checking now to find something.

Quote

https://bitcointalksearch.org/topic/m.2441946

Im using these for my ztex boards : http://www.cardreaderfactory.com/shop/atx-to-lancelot-power-adapter.html

Basically u hook in atx to it and you have 20 pairs of 12v contacts, and bonus some 5v ones which i currently dont use, but will use to power USB hubs, raspberry pi. - Mr Turtle

andrewsg

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I would really like something like that for Klondikes, but a Lancelot uses less power and has a different power plug / lead, so I don't think it would work "out of the box".

Bicknellski

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Quote from: Mabsark on June 20, 2013, 07:10:01 PM

The K16 requires 1 PCIE 6 pin connector, so you need 16 PCIE connectors to power 16 K16s. The following conversion cables exist to help with this:

1 x 8 pin ATX to PCIE
1 x PCIE to 2 x PCIE
2 x 4 pin to 2 x PCIE
2 x 4 pin to 1 x PCIE
1 x SATA to 1 x PCIE
2 x SATA to 1 x PCIE
1 x SATA to 1 x 4 pin
1 x SATA to 2 x 4 pin

Looking at PSUs, I found the SILVERSTONE Strider Essential series ST60F-ES 600W to provide the best value at 64.99 USD (54.99 with rebate) from Newegg. It has the following connectors:

1 x 8 pin ATX
4 x PCIE
3 x 4 pin
6 x SATA

The best combination is to go with the following connectors:

Coboc SC-PWC-MOL-8-SATA2-M-F-90 8inch 4pin MOLEX Male to Two 15pin SATA II Female w/ 90 degree Power Cable - 1.79 USD
Coboc SC-PWC-8-PCI 8inch SATA 15pin to 6pin PCI Express Card Power Cable - 0.98 USD

3 x Coboc SC-PWC-MOL-8-SATA2-M-F-90 = 5.37 USD
12 x Coboc SC-PWC-8-PCI = 11.76 USD
Total = 17.13 USD

At 64.99 USD + 17.13 USD, that's 82.12 USD for a 16 PCIE 600W 80+ Bronze PSU.

What have you guys turned up in your research?

http://www.cardreaderfactory.com/shop/atx-to-lancelot-power-adapter.html

r3animation

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Quote from: pajak666 on June 21, 2013, 12:46:15 PM

Anyone figured out some solution to actually turn on those PSU?
I mean they don't have power on/off switch, I wonder if I bought two K16 boards will I be able to give power on signal to my PSU?
If yes, how?

http://www.instructables.com/id/How-to-power-up-an-ATX-Power-Supply-without-a-PC/

pajak666

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Anyone figured out some solution to actually turn on those PSU?
I mean they don't have power on/off switch, I wonder if I bought two K16 boards will I be able to give power on signal to my PSU?
If yes, how?

Mabsark

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Quote from: kendog77 on June 20, 2013, 08:11:03 PM

One pci-e lead from the power supply typically contains two pci-e connectors. A k64 contains four k16 boards, so one pci-e lead with two splitters can power one k64 board.

I believe what I originally said was correct.

I don't believe it can. A 6 pin PCIE cable has 3 x 12V lines providing 6.25A and a maximum wattage of 75W. A K16 uses 32W so you'd only be able to power 2 K16s from a PCIE cable.

Mabsark

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Quote from: pajak666 on June 20, 2013, 08:09:31 PM

will 1x sata -> 1x pcie work?
I mean how much watt can sata cable provide?

Good question. That's something I didn't even consider. From the Wikipedia article for Serial ATA:

Quote

A third voltage is supplied, 3.3 V, in addition to the traditional 5 V and 12 V. However, few current disk drives use the 3.3 V line.

Quote

Each voltage is transmitted through three pins grouped together, because the small contacts by themselves cannot supply sufficient current for some devices. (Each pin should be able to carry 1.5 A.)

So, a SATA cable should be able to provide 12V * 3 * 1.5A = 54 W.

It seems to me, that powering 16 K16s is going to be more complicated and expensive than I first thought.

kendog77

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One pci-e lead from the power supply typically contains two pci-e connectors. A k64 contains four k16 boards, so one pci-e lead with two splitters can power one k64 board.

I believe what I originally said was correct.

pajak666

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will 1x sata -> 1x pcie work?
I mean how much watt can sata cable provide?

Mabsark

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Quote from: kendog77 on June 20, 2013, 07:40:36 PM

Here is a good thread and post that goes into detail:

https://bitcointalksearch.org/topic/reference-klondike-diyers-thread-227186

https://bitcointalksearch.org/topic/m.2061531

Personally, I have a lot of high powered power supplies with 6-8 PCI-E connectors that I'm holding onto from old mining rigs, and will just get PCI-E splitters.

According to BkkCoins, each PCI-E lead should power up to 4 K16 boards.

The link you provided shows BKKCoins saying that each PCIE cable can only power one K16:

Quote

A K16 will use around 32W, so a K64 will need about 128W each (with 4 leads). They're designed to take a PCIe 6 pin connector much like a GPU. I would guess that you could run a K64 off each PCIe lead from the PSU with splitters to feed each of the 4 sections.

kendog77

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Here is a good thread and post that goes into detail:

https://bitcointalksearch.org/topic/reference-klondike-diyers-thread-227186

https://bitcointalksearch.org/topic/m.2061531

Personally, I have a lot of high powered power supplies with 6-8 PCI-E connectors that I'm holding onto from old mining rigs, and will just get PCI-E splitters.

According to BkkCoins, each PCI-E lead should power up to 4 K16 boards.

Mabsark

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The K16 requires 1 PCIE 6 pin connector, so you need 16 PCIE connectors to power 16 K16s. The following conversion cables exist to help with this:

1 x 8 pin ATX to PCIE
1 x PCIE to 2 x PCIE
2 x 4 pin to 2 x PCIE
2 x 4 pin to 1 x PCIE
1 x SATA to 1 x PCIE
2 x SATA to 1 x PCIE
1 x SATA to 1 x 4 pin
1 x SATA to 2 x 4 pin

Looking at PSUs, I found the SILVERSTONE Strider Essential series ST60F-ES 600W to provide the best value at 64.99 USD (54.99 with rebate) from Newegg. It has the following connectors:

1 x 8 pin ATX
4 x PCIE
3 x 4 pin
6 x SATA

The best combination is to go with the following connectors:

Coboc SC-PWC-MOL-8-SATA2-M-F-90 8inch 4pin MOLEX Male to Two 15pin SATA II Female w/ 90 degree Power Cable - 1.79 USD
Coboc SC-PWC-8-PCI 8inch SATA 15pin to 6pin PCI Express Card Power Cable - 0.98 USD

3 x Coboc SC-PWC-MOL-8-SATA2-M-F-90 = 5.37 USD
12 x Coboc SC-PWC-8-PCI = 11.76 USD
Total = 17.13 USD

At 64.99 USD + 17.13 USD, that's 82.12 USD for a 16 PCIE 600W 80+ Bronze PSU.

What have you guys turned up in your research?

Topic: How to power 16 Klondike K16s? (Read 2068 times)