Server Power Supply Interface Board - for standalone miners and GPU rigs - page 25.

repairguy

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Quote from: RickJamesBTC on January 24, 2014, 09:21:40 PM

Using my risers, I have the pci-e plugs AND the +12v line from the riser card powered by the server PSU. I pair the grounds up to keep them in sync, and connect the +5V line from the risers to a molex connector on the controlling computer.

Nice, Do you have any idea how many amps @5v each card uses?

Also just to state I power everything on the mobo/powered risers(when I use them) from the atx supply and just use the server supply for the 6pins

freddyfarnsworth

full member

Activity: 238

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Quote from: repairguy on January 25, 2014, 12:23:33 AM

Quote from: freddyfarnsworth on January 24, 2014, 10:05:36 PM

Not trying to control the current flow, just making sure the bottom can feed as much as the top, all current will source the path of least resistance, seems you are quite aware

I really would like to advise you, but I have no idea what you are trying to say. If you want the bottom to have the capability to feed as much as the top(idk why because each 12v circuit in the card is isolated so the card isnt going to balance from feeds) then you would simply use the same size wire.

Only variable is the PCIE card... In a MB the PCIE wires feeding those cards do not get hot. No matter the load.
So I believe the reason the Heavy custom wires are hot, is the only difference I see and that is a custom PCIE Slot setup.

Makes no sense the 12-10 ga wire would even be warm at all. Something is off, trying to help.

repairguy

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Activity: 252

Merit: 250

Quote from: RickJamesBTC on January 24, 2014, 10:19:27 PM

I'm fairly certain they power separate circuits.

Yep and they are all electrically isolated from each other.

repairguy

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Activity: 252

Merit: 250

Quote from: freddyfarnsworth on January 24, 2014, 10:05:36 PM

Not trying to control the current flow, just making sure the bottom can feed as much as the top, all current will source the path of least resistance, seems you are quite aware

I really would like to advise you, but I have no idea what you are trying to say. If you want the bottom to have the capability to feed as much as the top(idk why because each 12v circuit in the card is isolated so the card isnt going to balance from feeds) then you would simply use the same size wire.

RickJamesBTC

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Activity: 378

Merit: 250

Quote from: freddyfarnsworth on January 24, 2014, 10:05:36 PM

Not trying to control the current flow, just making sure the bottom can feed as much as the top, all current will source the path of least resistance, seems you are quite aware

The pci card itself will draw from 20-75 watts through the pcie board connection, depending on card. The pci-e power plugs get the majority of the business. I'm fairly certain they power separate circuits.

freddyfarnsworth

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Activity: 238

Merit: 100

Not trying to control the current flow, just making sure the bottom can feed as much as the top, all current will source the path of least resistance, seems you are quite aware

RickJamesBTC

sr. member

Activity: 378

Merit: 250

Quote from: freddyfarnsworth on January 24, 2014, 09:03:49 PM

Quote from: RickJamesBTC on January 24, 2014, 01:46:26 PM

There isn't much more to it than that, and I already posted it in this thread somewhere. It's a big mess if you can see it clearly, let me live my lie!

Just a thought. if regular MB supplies xx amps to the GPU (usually max design is 3 very rare 4 GPU slots), were not the PCIE aux 6-8 pin headers added as a afterthought when big cards started coming out.

So can you bump the bottom supply current so the pcie headers do not have to work so hard ?

No, and you can't control where current goes. The cards demand a certain amount from each incoming power wire. Using my risers, I have the pci-e plugs AND the +12v line from the riser card powered by the server PSU. I pair the grounds up to keep them in sync, and connect the +5V line from the risers to a molex connector on the controlling computer. That lets them control card restarts properly. I had them all ganged up using a single 5v line, but whenever something goes wrong the motherboard tries to reset the cards and if the 5v line isn't connected to that mobo, the cards won't reset 100%.

freddyfarnsworth

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Quote from: RickJamesBTC on January 24, 2014, 01:46:26 PM

There isn't much more to it than that, and I already posted it in this thread somewhere. It's a big mess if you can see it clearly, let me live my lie!

Just a thought. if regular MB supplies xx amps to the GPU (usually max design is 3 very rare 4 GPU slots), were not the PCIE aux 6-8 pin headers added as a afterthought when big cards started coming out.

So can you bump the bottom supply current so the pcie headers do not have to work so hard ?

klondike_bar

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ASIC Wannabe

Quote from: allten on January 15, 2014, 01:43:22 PM

Quote from: allten on January 14, 2014, 04:07:16 PM

Finally found some information on how to turn on the HP Common Slot Power Supplies:

http://www.rchelination.com/setting-hp-dps-1200fb-power-supply/

Still looking for a connector though.

Here are few more details (Pin37 has 12V standby power and Pin30 is a ground):

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

would a DPS-800GB A have the same method for powering on? Its the same style of connector.
ps: shorting pin 34 to the pin opposite it on the blade causes the fans to come on. I havent tested the voltage of it though since i lack a second set of hands/aligator clips

_r2h

member

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Looks similar to what I have planned. 10awg to some pcie pigtails with 16awg on them.

RickJamesBTC

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Merit: 250

There isn't much more to it than that, and I already posted it in this thread somewhere. It's a big mess if you can see it clearly, let me live my lie!

mikep2012

sr. member

Activity: 362

Merit: 250

RickJamesBTC, can you post more photos - maybe in some online album, looks like a nice setup and i'm curious about the wiring.
thank you,

RickJamesBTC

sr. member

Activity: 378

Merit: 250

That's a few pieces of it. They are all working well, I was just a little concerned that the cables to the 280s were hot to the touch. None of them are hot enough to cause a problem though, so it will be ok till I remake them.

BotwinBG

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Activity: 588

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Quote from: RickJamesBTC on January 24, 2014, 06:02:23 AM

Quote from: bitpop on January 24, 2014, 03:05:05 AM

Quote from: RickJamesBTC on January 24, 2014, 03:03:07 AM

Quote from: bitpop on January 24, 2014, 03:01:27 AM

I'm sticking to 12v products
http://www.sonicelectronix.com/item_15889_StreetWires-DBX30.html

I need some cable Roll Eyes

Lol, I have SO MUCH 0 gauge cable and terminals around here.... I've been doing big car stereos for a long time.

I need some cable Roll Eyes

Are they lying to us? Or is that stuff really needed?

http://www.sonicelectronix.com/item_46861_NVX-XW0BL50.html

I use it all the time, it's not that expensive compared to 4ga, and gives you plenty of room to play.

Note to the server power supply crowd. My power cables that I've posted before are running a little warm, and my calculations should have been fine. I've got top of the line gxl 12ga 2' long cables running to each pair of R9-280x cards. They have about 45 amps running through them according to my amp clamp, and that shouldn't be enough to warm up the cables as much as it does. If you are making them similar to mine, you should switch that up to 10ga per pair. I'm going to make new ones for my 280 rigs and move these to my next 270 setups.

I spent some time today taping up the fans on each pair of power supplies, now they are sealed to the units and I'm not overheating anymore. Crisis averted I hope!

You gotta share your work of art with the rest of us, take pictures!

RickJamesBTC

sr. member

Activity: 378

Merit: 250

Quote from: bitpop on January 24, 2014, 03:05:05 AM

Quote from: RickJamesBTC on January 24, 2014, 03:03:07 AM

Quote from: bitpop on January 24, 2014, 03:01:27 AM

I'm sticking to 12v products
http://www.sonicelectronix.com/item_15889_StreetWires-DBX30.html

I need some cable Roll Eyes

Lol, I have SO MUCH 0 gauge cable and terminals around here.... I've been doing big car stereos for a long time.

I need some cable Roll Eyes

Are they lying to us? Or is that stuff really needed?

http://www.sonicelectronix.com/item_46861_NVX-XW0BL50.html

I use it all the time, it's not that expensive compared to 4ga, and gives you plenty of room to play.

Note to the server power supply crowd. My power cables that I've posted before are running a little warm, and my calculations should have been fine. I've got top of the line gxl 12ga 2' long cables running to each pair of R9-280x cards. They have about 45 amps running through them according to my amp clamp, and that shouldn't be enough to warm up the cables as much as it does. If you are making them similar to mine, you should switch that up to 10ga per pair. I'm going to make new ones for my 280 rigs and move these to my next 270 setups.

I spent some time today taping up the fans on each pair of power supplies, now they are sealed to the units and I'm not overheating anymore. Crisis averted I hope!

bitpop

legendary

Activity: 2912

Merit: 1060

Quote from: RickJamesBTC on January 24, 2014, 03:03:07 AM

Quote from: bitpop on January 24, 2014, 03:01:27 AM

I'm sticking to 12v products
http://www.sonicelectronix.com/item_15889_StreetWires-DBX30.html

I need some cable Roll Eyes

Lol, I have SO MUCH 0 gauge cable and terminals around here.... I've been doing big car stereos for a long time.

I need some cable Roll Eyes

Are they lying to us? Or is that stuff really needed?

http://www.sonicelectronix.com/item_46861_NVX-XW0BL50.html

RickJamesBTC

sr. member

Activity: 378

Merit: 250

Quote from: bitpop on January 24, 2014, 03:01:27 AM

I'm sticking to 12v products
http://www.sonicelectronix.com/item_15889_StreetWires-DBX30.html

Lol, I have SO MUCH 0 gauge cable and terminals around here.... I've been doing big car stereos for a long time.

bitpop

legendary

Activity: 2912

Merit: 1060

I'm sticking to 12v products
http://www.sonicelectronix.com/item_15889_StreetWires-DBX30.html

RickJamesBTC

sr. member

Activity: 378

Merit: 250

Correct, current capacity is a function of resistance and voltage loss. You draw 300 amps at 12V, that's about 3600 watts of power. You draw 300 amps at 240V that's 72000 watts, yet both can be carried through the same appropriately sized wire.

Often a voltage rating of a conductor or fuse relates to arc suppression. A very high voltage applied to a low voltage component may be able to leap the gap between conductors or if a fuse blows, it may still arc.

_r2h

member

Activity: 63

Merit: 10

Not a sparky like the rest of my family, why I asked.

Topic: Server Power Supply Interface Board - for standalone miners and GPU rigs - page 25. (Read 120715 times)