For anyone who want to save some time, i have fully modded PSU for sale.
http://i.imgur.com/0oAWMzI.jpg
IBM DPS-1300BB 1300w with 4x6 pin + 4x(6+2)pin plus the essential synchron-start-cable(24 pin ATX-->24 pin ATX+ 2 pin + 2 pin), with what the power on and off will be synchronized with the main ATX PSU.
Easy expendable to 2600w, just put another 1300w to the spare 2 pin from the start cable.
Here is the link where you can see more photos and details
http://www.ebay.de/itm/321349206895
(ye i know it's german, i live in germany)
If you are interested, pm me.
Topic: Server Power Supply Interface Board - for standalone miners and GPU rigs - page 14. (Read 120772 times)
March 13, 2014, 04:43:31 AM
March 11, 2014, 10:54:14 PM
Would you be able to? I think that questions your capabilities as a hardware assembler and I can't answer that for you.
But anyways... If the risers only take in 12V from the molex, and the cards you mentioned pull the power you mentioned combined through the 6/8-pin and risers, then yes the DPS-1520 should be able to power your 4 GPUs and their attached risers. Your ATX would then only need to source power for the other GPU/riser (~300W?) and motherboard (~200W?) so a 500/600 ought be sufficient. Probably?
I'd rather run wires for each connector instead of sharing. It can be wired with two connectors sharing the same wire, but its reliability depends on the length and gauge of the home run because you'll be pulling the full current of both connectors through it. The more current through a wire, the more power dissipation in the wire. That means the wire warms up and, if it's way under spec, could melt or burn something. Power dissipation in the wire is also a result of voltage drop in the wire, which means less voltage getting to the load, which means a higher current required to power the load fully, which further increases the strain on your wires. If it's calculated out properly you shouldn't have any problems, but in general the more copper the better (at least as far as is practical with weight/price, like for most of what you're doing 000AWG won't do you any better than, say, 14AWG).
But anyways... If the risers only take in 12V from the molex, and the cards you mentioned pull the power you mentioned combined through the 6/8-pin and risers, then yes the DPS-1520 should be able to power your 4 GPUs and their attached risers. Your ATX would then only need to source power for the other GPU/riser (~300W?) and motherboard (~200W?) so a 500/600 ought be sufficient. Probably?
I'd rather run wires for each connector instead of sharing. It can be wired with two connectors sharing the same wire, but its reliability depends on the length and gauge of the home run because you'll be pulling the full current of both connectors through it. The more current through a wire, the more power dissipation in the wire. That means the wire warms up and, if it's way under spec, could melt or burn something. Power dissipation in the wire is also a result of voltage drop in the wire, which means less voltage getting to the load, which means a higher current required to power the load fully, which further increases the strain on your wires. If it's calculated out properly you shouldn't have any problems, but in general the more copper the better (at least as far as is practical with weight/price, like for most of what you're doing 000AWG won't do you any better than, say, 14AWG).
Yes I am more than capable of putting it all together, but thanks for picking apart my question when the intention was plain to see :p
No, seriously, you've answered everything I need to know. I will get some Molex connectors tomorrow and put it all together.
And for the record I'm using 16awg wire, direct from China! Haha. Although it looks suspiciously thin for my liking, and I'd guess its actually 18awg. Either way I'll wire up the connectors separately to be on the safe side.
Thanks again for your time.
Tony.
March 11, 2014, 10:23:11 PM
Would you be able to? I think that questions your capabilities as a hardware assembler and I can't answer that for you.
But anyways... If the risers only take in 12V from the molex, and the cards you mentioned pull the power you mentioned combined through the 6/8-pin and risers, then yes the DPS-1520 should be able to power your 4 GPUs and their attached risers. Your ATX would then only need to source power for the other GPU/riser (~300W?) and motherboard (~200W?) so a 500/600 ought be sufficient. Probably?
I'd rather run wires for each connector instead of sharing. It can be wired with two connectors sharing the same wire, but its reliability depends on the length and gauge of the home run because you'll be pulling the full current of both connectors through it. The more current through a wire, the more power dissipation in the wire. That means the wire warms up and, if it's way under spec, could melt or burn something. Power dissipation in the wire is also a result of voltage drop in the wire, which means less voltage getting to the load, which means a higher current required to power the load fully, which further increases the strain on your wires. If it's calculated out properly you shouldn't have any problems, but in general the more copper the better (at least as far as is practical with weight/price, like for most of what you're doing 000AWG won't do you any better than, say, 14AWG).
But anyways... If the risers only take in 12V from the molex, and the cards you mentioned pull the power you mentioned combined through the 6/8-pin and risers, then yes the DPS-1520 should be able to power your 4 GPUs and their attached risers. Your ATX would then only need to source power for the other GPU/riser (~300W?) and motherboard (~200W?) so a 500/600 ought be sufficient. Probably?
I'd rather run wires for each connector instead of sharing. It can be wired with two connectors sharing the same wire, but its reliability depends on the length and gauge of the home run because you'll be pulling the full current of both connectors through it. The more current through a wire, the more power dissipation in the wire. That means the wire warms up and, if it's way under spec, could melt or burn something. Power dissipation in the wire is also a result of voltage drop in the wire, which means less voltage getting to the load, which means a higher current required to power the load fully, which further increases the strain on your wires. If it's calculated out properly you shouldn't have any problems, but in general the more copper the better (at least as far as is practical with weight/price, like for most of what you're doing 000AWG won't do you any better than, say, 14AWG).
March 11, 2014, 09:38:48 PM
Depending on the strength of your desktop supply, it should. Powered risers you should allow at least 75W of 12V per riser, and at least 300W of 12V for your other GPU. Depending on your board/CPU, you'll want 100-200W for that. Looking at getting at least 800W desktop supply to run all that.
If anyone, ever, anyone at all, has any actual experience building GPU rigs with riser cards, feel free to chime in. The most I've done is 3 GPUs direct on a board, with an ATX giving 35A of 12V and a 500W server supply doing the rest. The only advice I can give regarding high-end crap is somewhere between theory and conjecture. Never used risers, never used an ATX supply over 500W, never used more than 3 GPUs, never used a DPS-1520.
If anyone, ever, anyone at all, has any actual experience building GPU rigs with riser cards, feel free to chime in. The most I've done is 3 GPUs direct on a board, with an ATX giving 35A of 12V and a 500W server supply doing the rest. The only advice I can give regarding high-end crap is somewhere between theory and conjecture. Never used risers, never used an ATX supply over 500W, never used more than 3 GPUs, never used a DPS-1520.
Still a damn site better than knowing nothing - Thanks buddy
Two more questions while I've got your attention, if you don't mind?
-Would I be able to wire up MOLEX connectors aswell as the PCIE to the DPS-1520 to power the four cards/risers. And then use say a 500-600w PSU for the other card/riser/mobo?
-Is it wise to run two lengths of both live/earth from PSU to each 6 pin connector per card, or can it be wired so that the second 6 pin is jumped off the first?
Like this -
March 11, 2014, 09:21:00 PM
Depending on the strength of your desktop supply, it should. Powered risers you should allow at least 75W of 12V per riser, and at least 300W of 12V for your other GPU. Depending on your board/CPU, you'll want 100-200W for that. Looking at getting at least 800W desktop supply to run all that.
If anyone, ever, anyone at all, has any actual experience building GPU rigs with riser cards, feel free to chime in. The most I've done is 3 GPUs direct on a board, with an ATX giving 35A of 12V and a 500W server supply doing the rest. The only advice I can give regarding high-end crap is somewhere between theory and conjecture. Never used risers, never used an ATX supply over 500W, never used more than 3 GPUs, never used a DPS-1520.
If anyone, ever, anyone at all, has any actual experience building GPU rigs with riser cards, feel free to chime in. The most I've done is 3 GPUs direct on a board, with an ATX giving 35A of 12V and a 500W server supply doing the rest. The only advice I can give regarding high-end crap is somewhere between theory and conjecture. Never used risers, never used an ATX supply over 500W, never used more than 3 GPUs, never used a DPS-1520.
March 11, 2014, 09:14:00 PM
Preemptive disclaimer that I don't work with GPUs a lot.
But I would imagine the 300W and 280W from your cards, part of that is coming from the risers. If you don't plug the risers into a heavy external supply but run them off your ATX, I'd allot at least 6A of 12V per riser. If the 300W/280W is straight external, they should all run off the DPS-1520 without issue. If that includes the socket power (from risers in this case), you could power the risers off the DPS-1520 and still only be at 80% capacity.
If, then, you ran your 6950 and motherboard off the ATX supply, I'd recommend probably at least a 500W unit. Maybe more depending on what processor/motherboard you're running, and what overhead you want to allow for.
What you could do, and an idea I've toyed around with but haven't tested yet, is actually get two server supplies in parallel load-balanced (I don't know enough about that particular model to know if they current-share or not, but I think most do) and get a picoPSU running off the 12V bus for your motherboard. Those things aren't terribly expensive, and run around 96% efficient. If you isolate your riser power from the motherboard power (either by using the recommended USB-style risers or cutting the 12V lines to the ribbon) you shouldn't overload anything on the picoPSU by trying to pull GPU current through it, and anything else requiring 12V (like GPU, or processor VRMs) would pull straight from your ~3KW 12V source.
But I would imagine the 300W and 280W from your cards, part of that is coming from the risers. If you don't plug the risers into a heavy external supply but run them off your ATX, I'd allot at least 6A of 12V per riser. If the 300W/280W is straight external, they should all run off the DPS-1520 without issue. If that includes the socket power (from risers in this case), you could power the risers off the DPS-1520 and still only be at 80% capacity.
If, then, you ran your 6950 and motherboard off the ATX supply, I'd recommend probably at least a 500W unit. Maybe more depending on what processor/motherboard you're running, and what overhead you want to allow for.
What you could do, and an idea I've toyed around with but haven't tested yet, is actually get two server supplies in parallel load-balanced (I don't know enough about that particular model to know if they current-share or not, but I think most do) and get a picoPSU running off the 12V bus for your motherboard. Those things aren't terribly expensive, and run around 96% efficient. If you isolate your riser power from the motherboard power (either by using the recommended USB-style risers or cutting the 12V lines to the ribbon) you shouldn't overload anything on the picoPSU by trying to pull GPU current through it, and anything else requiring 12V (like GPU, or processor VRMs) would pull straight from your ~3KW 12V source.
Right, I've somewhat conflicting info from elsewhere now.
Simplified - I have DPS-1520 wired to 4x GPU's. Can my Desktop PSU power the MOBO and the powered risers too (plus an extra card if I have the headroom) ?
March 11, 2014, 08:42:29 PM
Preemptive disclaimer that I don't work with GPUs a lot.
But I would imagine the 300W and 280W from your cards, part of that is coming from the risers. If you don't plug the risers into a heavy external supply but run them off your ATX, I'd allot at least 6A of 12V per riser. If the 300W/280W is straight external, they should all run off the DPS-1520 without issue. If that includes the socket power (from risers in this case), you could power the risers off the DPS-1520 and still only be at 80% capacity.
If, then, you ran your 6950 and motherboard off the ATX supply, I'd recommend probably at least a 500W unit. Maybe more depending on what processor/motherboard you're running, and what overhead you want to allow for.
What you could do, and an idea I've toyed around with but haven't tested yet, is actually get two server supplies in parallel load-balanced (I don't know enough about that particular model to know if they current-share or not, but I think most do) and get a picoPSU running off the 12V bus for your motherboard. Those things aren't terribly expensive, and run around 96% efficient. If you isolate your riser power from the motherboard power (either by using the recommended USB-style risers or cutting the 12V lines to the ribbon) you shouldn't overload anything on the picoPSU by trying to pull GPU current through it, and anything else requiring 12V (like GPU, or processor VRMs) would pull straight from your ~3KW 12V source.
But I would imagine the 300W and 280W from your cards, part of that is coming from the risers. If you don't plug the risers into a heavy external supply but run them off your ATX, I'd allot at least 6A of 12V per riser. If the 300W/280W is straight external, they should all run off the DPS-1520 without issue. If that includes the socket power (from risers in this case), you could power the risers off the DPS-1520 and still only be at 80% capacity.
If, then, you ran your 6950 and motherboard off the ATX supply, I'd recommend probably at least a 500W unit. Maybe more depending on what processor/motherboard you're running, and what overhead you want to allow for.
What you could do, and an idea I've toyed around with but haven't tested yet, is actually get two server supplies in parallel load-balanced (I don't know enough about that particular model to know if they current-share or not, but I think most do) and get a picoPSU running off the 12V bus for your motherboard. Those things aren't terribly expensive, and run around 96% efficient. If you isolate your riser power from the motherboard power (either by using the recommended USB-style risers or cutting the 12V lines to the ribbon) you shouldn't overload anything on the picoPSU by trying to pull GPU current through it, and anything else requiring 12V (like GPU, or processor VRMs) would pull straight from your ~3KW 12V source.
March 11, 2014, 04:41:59 PM
Oh, and regarding your initial question "Is the DPS-1520AB 1440w?" I've gotten used to dealin with people with horrible grammar, and people asking about different models, so that I misread it. A quick glance at the Internet tells me it is a 1440W supply. If a single GPU doesn't pull more than 360W then technically you'd be within range of the supply with 4 GPUs; for longevity I'd try not to pull more than 325W (90% load). PCIe standard doesn't really allow for more than 300, but not all high-end cards are standards-compliant with regard to power usage especially when overclocked.
Admittedly, I didn't word my question very well, and even my edit isn't much better!
Can I pick your brains while ive got your attention?
I have:
2x 280x VaporX's (300w each?)
2x VTX 6950's (280w each)
- These will be running off the DELL 1520ab.
I will have one more 6950 and 5 powered risers and motherboard running off another PSU.
Can you suggest what wattage PSU I would need to power the MOBO/RISERS/6950?
Thanks again.
March 11, 2014, 11:32:26 AM
I'm interested in some of the boards for the Dell 750W power supplies - sent email to the address at Gekkoscience but haven't seen a reply yet. Looking for 4-6 boards - with the cables. How long are the cables on these?
March 11, 2014, 09:20:18 AM
Oh, and regarding your initial question "Is the DPS-1520AB 1440w?" I've gotten used to dealin with people with horrible grammar, and people asking about different models, so that I misread it. A quick glance at the Internet tells me it is a 1440W supply. If a single GPU doesn't pull more than 360W then technically you'd be within range of the supply with 4 GPUs; for longevity I'd try not to pull more than 325W (90% load). PCIe standard doesn't really allow for more than 300, but not all high-end cards are standards-compliant with regard to power usage especially when overclocked.
March 11, 2014, 09:19:31 AM
If you are really paranoid, cut the 12V lines on the ribbon risers. Should not matter either way though.
I prefer USB risers, they are naturally isolated from the motherboard, at least for power. I treat them as a 75W load (though it's closer to 30-50W in my experience) and balance them across as many supplies as I feel necessary.
I prefer USB risers, they are naturally isolated from the motherboard, at least for power. I treat them as a 75W load (though it's closer to 30-50W in my experience) and balance them across as many supplies as I feel necessary.
March 11, 2014, 08:56:22 AM
Seems like it wouldn't be necessary. I don't think anything cares much which 12V rail, as long as there's a common ground. I haven't used any risers but others have been strapping them to home-rigged server supplies without any problems... I think. Someone'll surely mention it. Odds are it's been talked about sometime in the thread so far though.
PCIe standard allows 75W through the socket, 75W through a 6-pin and 150W through an 8-pin. So the riser, taking over for the socket, should top out at 75W, or at 12V 6.3A
PCIe standard allows 75W through the socket, 75W through a 6-pin and 150W through an 8-pin. So the riser, taking over for the socket, should top out at 75W, or at 12V 6.3A
Thanks for your help. I've read through the thread a few times and didn't see anything. I've got my head around this now, so time to get it all put together!
March 11, 2014, 08:20:11 AM
Seems like it wouldn't be necessary. I don't think anything cares much which 12V rail, as long as there's a common ground. I haven't used any risers but others have been strapping them to home-rigged server supplies without any problems... I think. Someone'll surely mention it. Odds are it's been talked about sometime in the thread so far though.
PCIe standard allows 75W through the socket, 75W through a 6-pin and 150W through an 8-pin. So the riser, taking over for the socket, should top out at 75W, or at 12V 6.3A
PCIe standard allows 75W through the socket, 75W through a 6-pin and 150W through an 8-pin. So the riser, taking over for the socket, should top out at 75W, or at 12V 6.3A
March 11, 2014, 08:12:34 AM
What I meant was -
Do the Molex Powered Risers need to come from same 12v rail as the motherboard?
And also, how much power is drawn through the powered risers, do you know?
Do the Molex Powered Risers need to come from same 12v rail as the motherboard?
And also, how much power is drawn through the powered risers, do you know?
March 11, 2014, 08:09:07 AM
Quote
Let it be known that I am a curmudgeon by nature, and therefore will start responding to these messages by saying "RTFThread" and a link, as all of these questions have been answered repeatedly in the thread people claim to have read. It's been stated that I currently have boards for the D750P/N750P supplies, and will within a few days start prototyping DPS-2000BB and DPS-800 boards.
No. Not the DPS-1520AB.
As for running GPUs, you WILL need an ATX supply of some kind to power your motherboard. You should be able to run the risers off the D750, hopefully someone else can verify that. But motherboards require more 5V and 3.3V than these will source so a separate ATX is necessary. If your board is low-power enough, you could get a PicoPSU and run it off the 12V from these supplies.
March 11, 2014, 03:54:16 AM
Is the DPS-1520AB 1440w?
And is it safe to have It power Four Gpu's, and have a seperate 650w psu to 5x powered risers, and another GPU?
EDIT/ Worded better -
Can you tell me if I need a seperate PSU to run the Motherboard AND the molex on the powered risers?
Or the Molex on the powered risers can be wired into the DELL server PSU?
Thanks
And is it safe to have It power Four Gpu's, and have a seperate 650w psu to 5x powered risers, and another GPU?
EDIT/ Worded better -
Can you tell me if I need a seperate PSU to run the Motherboard AND the molex on the powered risers?
Or the Molex on the powered risers can be wired into the DELL server PSU?
Thanks
March 09, 2014, 07:43:24 AM
Hey!
I'm reading this topic almost since begginig of it.
I have bought DPS-1200BB, which will be used for GPU mining. I assume you all are talking about ASIC mining here, correct?
After reading your debate i got confused about wiring. Does ASIC miners need more current then GPU? Because 8pin connectors with wires that i bought got 3x 20AWG (cables are 30cm long (12inches)...
Is this enough?
I'm reading this topic almost since begginig of it.
I have bought DPS-1200BB, which will be used for GPU mining. I assume you all are talking about ASIC mining here, correct?
After reading your debate i got confused about wiring. Does ASIC miners need more current then GPU? Because 8pin connectors with wires that i bought got 3x 20AWG (cables are 30cm long (12inches)...
Is this enough?
The boards sold here to work with the server PSUs could be used for either GPU or ASIC mining. I believe its a toss up in terms of which draws more power GPU/ASIC due to the hacks and overclocking mods now on some ASICS that allow for more power/performance use.
If you are considering GPU mining I would suggest that you have at a minimum 18AWG wire in runs of less than 2ft. From my understanding the cables sold here are 14 or 16AWG which yields more safety headroom.
Yes everything here is a good and safe bet for ASIC and GPU Mining
March 09, 2014, 07:22:22 AM
Speaking of DPS-1520AB A, does anyone have a pinout for that?
Pin A1 to B1 to power upDo you know the rest of the pinout?
March 09, 2014, 03:21:10 AM
Speaking of DPS-1520AB A, does anyone have a pinout for that?
Pin A1 to B1 to power upDo you know the rest of the pinout?
March 06, 2014, 02:35:43 AM
https://bitcointalksearch.org/topic/for-sale-d750-750w-server-psu-breakout-boards-503423
Sales officially open 9AM CST. Got about a hundred boards, and we're offering full kits including the power supply.
Had what I hope turns into a good idea today, for the DPS-800GBA boards. Those supplies are pretty handy, with just about everything already integrated and broke out - except I didn't find any information on current share, nor was I able to determine experimentally any load-balancing ability. But I think I figured out how to integrate it into the interface board. It'll take some testing but if it works you'll be able to parallel and load-balance the DPS-800 also - hopefully while still also allowing user voltage adjustments (up to ~14.5V, sweet).
Sales officially open 9AM CST. Got about a hundred boards, and we're offering full kits including the power supply.
Had what I hope turns into a good idea today, for the DPS-800GBA boards. Those supplies are pretty handy, with just about everything already integrated and broke out - except I didn't find any information on current share, nor was I able to determine experimentally any load-balancing ability. But I think I figured out how to integrate it into the interface board. It'll take some testing but if it works you'll be able to parallel and load-balance the DPS-800 also - hopefully while still also allowing user voltage adjustments (up to ~14.5V, sweet).
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