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41  Economy / Computer hardware / Re: [WTS] ATX PSU to 2.5 or 2.1/5.5mm 12V coaxial plug power cables [New Product!!] on: March 19, 2014, 02:21:28 AM
How many units can 1 pci-e cable power safely for scrypt mode?  Also how many can you power from molex?

If you are looking to be conservative I would say 60w per wire pair within the PCIe connector. At roughly 10w per device that is 6 units per wire pair and 18 units total, conservatively. It is possible to go up to 80w per wire pair but that just stresses the housings, pins and wires and will yield lower MTBF rates.

Looking at a molex 'chain' there is only a single 12v wire pair to be utilized there but it is shared. This is going to limit you to 60w on the entire 'chain' (usually 3 molex plugs and a floppy).

Hope that helps.

If I understand this correctly this should be possible right?

PCIe60w
60w
60w
Sata60w
Molex60w
CPU60w
60w
CPU?60w
60w
ATX60w
60w

CPU? is for a x8 CPU powercord vs a x4 CPU power cord

Which would lead me to believe this should be possible:

12V Watt12V Watt5V Watt
Gridseed7
Current PSU426110
Minimum PSU40050
Total32040
Miners40
gridseedsHubController12V Total
PCIe5351045
53535
5351045
Sata5352035
Sata5351045
Molex5352035
CPU5351045
53535

40 Gridseeds
4   Hubs
4   Controllers
(this configruation is for a Corsair CS450M by the way)

Same data in an editable google spreadsheets file: https://docs.google.com/spreadsheet/ccc?key=0AtUI9gzMvUJ7dGtPZENPQWhBR1JJVF9xX3M0czhEUGc&usp=sharing .
the coloured cells are automatically calculated so please do not put any numbers in them.

This is also made without knowledge of the Hub and controllers power consumption so I just counted them for 10w to have a number.
Also: I made this with your molex to USB power connectors in mind. That's why all the controllers are counted into the one molex link.

Am I right in thinking this is possible?
and if so: will you be supplying cables to do this kind of stuff?
(for example: cables that go from Sata power to either 5x 2.1mm or just to 2.1mm so you can plug in an extension for 5?)

I'd like to hear your opinion

Just for fun:
Cables needed to do this:
1x PCIe female to 3x 2.1mm male
2x Sata male to 2.1mm male
1x Sata male to 2x Molex female splitter
1x Molex male to 2.1mm male
1x Molex male to 2x Molex female splitter
4x Molex male to micro usb
1x CPU female to 2x 2.1mm male
8x 2.1mm female to 5x 2.1mm male
42  Economy / Computer hardware / Re: [WTS] ATX PSU to 2.5 or 2.1/5.5mm 12V coaxial plug power cables [New Product!!] on: March 05, 2014, 09:08:34 PM
@ADutchGamer - you read my mind. Smiley  Here is my modular cable design for ATX powering of gridseed miners.

Link: https://i.imgur.com/tw621Q4.jpg
IMG

You can see from the design that this setup allows for dual mode miners to run safely with only 3 plugs per PCIe and allows for expansion of up to 15 plugs for scrypt miners on a single PCIe connector from the PSU. It also works well for those with 10 units as it leaves a single plug free to power a 12V usb hub if needed.

I have pretty much finalized the design except for the actual lengths needed. I could really use some help on that from anyone who has these units. I need to know approximately how long 5 units are end to end similar to how they would be in a spotswood case and also how far apart the individual plugs on the units are (pitch).

I have been pointed to a manufacturing house and will be getting a quote in to them as soon as the BOM, final measurements and order tally are finished. Once that is done I should get the prototype for testing from them and have pricing for you guys. If you haven't already drop a message here or in PM about how many devices you will be powering so I can determine what size order to put in, thanks.


If you have any comments or questions please feel free.

Haha yeah and I will not discuss the things I saw there last night Tongue

I will probably be ordering these for at least 20 gridseeds so I'm curious about the (estimated)cost of sending these to the netherlands. (maybe make a list in the OP with estimations?)
43  Economy / Computer hardware / Re: [WTS] ATX PSU to 2.5 or 2.1/5.5mm 12V coaxial plug power cables [New Product!!] on: March 05, 2014, 11:05:47 AM
I've been thinking about this and might have a solution(might be completely off as well).

If I understand this correctly you can pull the power for 5 dual gridseed miners or 15 scrypt gridseed miners off one PCIe port.

Why not take the simple route: create a cable for 5 dual miners and offer up extension cords of 3 plugs to make these work for scrypt miners. Give these clear names like: "gridseed power cord" and "gridseed SCRYPT extension". I think this should make this relatively idiot proof.

You might also be able to make a complete package(this is written without knowledge of the power usage for the hub and controller):
"gridseed power cord" with 4 dual miner plugs and added wires for the usb hub and controller.
"gridseed SCRYPT extension" with plugs for 4 gridseed devices.
maybe a power button/cable/whatever to turn on the PSU?

edit: To make this more modular you might be able to just go with the 5 plug power cord and offer extensions cords for controllers and usb hubs.
also: if people start daisychaining these extension cords and something blows up/burns I would think this is on them. You have tried to protect them (with the names)and they chose to ignore you

slightly different idea:
Default package:
"gridseed power cord" with 5 plugs that do not fit the gridseeds.
"gridseed dual mining plugs" converts unusable plug into dual miner plug

Optional extras/replacements for convertor plugs
"gridseed SCRYPT extension" with plugs for 3 or 4 gridseed devices.
"gridseed hub and controller extension" name says everything.(this could have different parts depending on the customers order/hardware)
power button to turn on the PSU
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