Close, I went with a 5v relay. I do like these HP power supplies, they were basically free.
This is really great idea and I just hand-on 2 HP DPS-600PB. I like to use matched connector too, but it is hard to found any where.
Topic: Server Power Supply Interface Board - for standalone miners and GPU rigs - page 36. (Read 120715 times)
December 21, 2013, 10:31:53 AM
I like to use matched connector too, but it is hard to found any where.
December 21, 2013, 08:32:29 AM
Please add at least 2 mounting holes, for M3 or 6-32 bolts. 
December 21, 2013, 07:02:48 AM
Close, I went with a 5v relay. I do like these HP power supplies, they were basically free.
December 21, 2013, 06:10:06 AM
I've been playing around with hacking server supplies since probably June, first for GPU and now for standalone. Decided it would be a better way to go to make a pluggable interface board than make all the changes internal to the PSU. Faster, easier and interchangable/replaceable.
What I'm working with has pins and blades, not an edge connector, but I'll probably start looking into making for the HP 850/1000 that everyone seems to love from their Blade backplanes.
I'm guessing you're using a 12V relay to kick the supply on from external source?
What I'm working with has pins and blades, not an edge connector, but I'll probably start looking into making for the HP 850/1000 that everyone seems to love from their Blade backplanes.
I'm guessing you're using a 12V relay to kick the supply on from external source?
December 21, 2013, 06:03:36 AM
Glad to see I'm not the only one doing this.
For the molex crimp pins, I used mouser 538-39-00-0038-CT, I used 538-39-01-2060 for the 6 pin connectors but they have one square plug that didn't match my video cards but worked with the cube. The big issue is making all the connections, it's too time consuming to do by hand and the edge connector I used was $6 plus $0.27 per pin. Overall it's worth it for my own use because I already had the tools but the labor and liability keeps me from selling any.
For the molex crimp pins, I used mouser 538-39-00-0038-CT, I used 538-39-01-2060 for the 6 pin connectors but they have one square plug that didn't match my video cards but worked with the cube. The big issue is making all the connections, it's too time consuming to do by hand and the edge connector I used was $6 plus $0.27 per pin. Overall it's worth it for my own use because I already had the tools but the labor and liability keeps me from selling any.
December 21, 2013, 05:20:24 AM
First "complete" prototype finished and undergoing testing; as soon as a reliable source of parts can be found I'll start on actual production. If anyone's got an "in" with Molex or FCI I wouldn't mind a bit of assistance tracking down both parts and information.
This board is designed to mate with a Dell Z750P power supply from a PowerEdge 2950; said supplies can be found fairly readily on eBay in various conditions for as low as $12. They are rated to provide 62A at 12V at 90% efficiency. This interface board provides
- Screw terminals for +12V and GND so you only hook up what cables you need.
- Additional output capacitance for voltage ripple and burst current buffering
- Manual fan speed control (the stock full speed is quite loud)
- Auto-powerup which can be triggered by an external signal as low as 3V, disablable by a toggle switch
- Manual powerup from a toggle switch. Because toggle switches are legit.
- In-signal and Out-signal headers which allow chaining, so one supply can turn on multiple others
- Current share feature which should allow multiple supplies to cross-regulate and evenly distribute high power loads in parallel
I've had one of these supplies running a pair of full-overclocked Cubes for a few weeks with zero issues. These supplies, equipped with these boards, should work beautifully for standalone miners at reduced cost for comparable ATX supplies (similar power and efficiency) and without requiring paperclips or additional wire management. Output regulation should also be better than a standard ATX.
They'll also work as additional 12V rails controlled by ATX supplies; the auto-powerup was originally designed to fire up the supply as additional power for a GPU rig.
The Z750P uses a fairly common interface style and pinout; I don't have a complete list of other supplies this board would work for but there should be several.
I don't have an estimated price tag yet, probably in the neighborhood of $30 to $40 - a lot of that is going to depend on the cost of parts. All manufacture will be done by American people in America, which adds to the cost a bit but one of the tenets of my business is to never for any reason outsource jobs that can be done domestically.
This board is designed to mate with a Dell Z750P power supply from a PowerEdge 2950; said supplies can be found fairly readily on eBay in various conditions for as low as $12. They are rated to provide 62A at 12V at 90% efficiency. This interface board provides
- Screw terminals for +12V and GND so you only hook up what cables you need.
- Additional output capacitance for voltage ripple and burst current buffering
- Manual fan speed control (the stock full speed is quite loud)
- Auto-powerup which can be triggered by an external signal as low as 3V, disablable by a toggle switch
- Manual powerup from a toggle switch. Because toggle switches are legit.
- In-signal and Out-signal headers which allow chaining, so one supply can turn on multiple others
- Current share feature which should allow multiple supplies to cross-regulate and evenly distribute high power loads in parallel
I've had one of these supplies running a pair of full-overclocked Cubes for a few weeks with zero issues. These supplies, equipped with these boards, should work beautifully for standalone miners at reduced cost for comparable ATX supplies (similar power and efficiency) and without requiring paperclips or additional wire management. Output regulation should also be better than a standard ATX.
They'll also work as additional 12V rails controlled by ATX supplies; the auto-powerup was originally designed to fire up the supply as additional power for a GPU rig.
The Z750P uses a fairly common interface style and pinout; I don't have a complete list of other supplies this board would work for but there should be several.
I don't have an estimated price tag yet, probably in the neighborhood of $30 to $40 - a lot of that is going to depend on the cost of parts. All manufacture will be done by American people in America, which adds to the cost a bit but one of the tenets of my business is to never for any reason outsource jobs that can be done domestically.
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