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So, currently I have 4 separate rigs running on a 240v line I put in a few weeks ago with assorted PSUs I've bought over time.  I'm frustrated/annoyed with the realization that different PSU manufacturers have different pin-out configurations for their cables (I actually accidentally killed 4 hard drives in a RAID as a result of this, thankfully I'm a backup fanatic).

To consolidate and hopefully improve efficiency I've order a 2400w PSU from parallel miners, and my search on the forum hasn't yielded much in the way of feedback on these, although the 1200w units seem alot more common.

This is the unit I've ordered (should be here in roughly a week):

http://www.parallelminer.com/product/94-platinum-2400w-power-supply-kit-for-2-a4-dominator-litecoin-miners-200-240v/

My questions are as follow:
1) This configuration is set up for 6 pin power cables, while many of my cards have 8-pin connectors on them - will using 6 pin only connectors work on the cards I have (480s and 1080s)?

2) I understand conceptually how to connect and bridge two standard PSUs to be used on one mobo (add2psu, jumpers, etc...) but since this unit doesn't have an ATX connector and only the PCIs - does this unit automatically power on due to logic on the breakout board or do I need to plan to do something else to have this power on with my cards?

3) Ideally I would like to use this PSU to run several rigs worth of cards to reduce cabling and clean things up on my rack, given the above question about how to trigger it to power on state - is it realistic to set this up to power on multiple motherboards worth of cards, and if so is there anything special I would need to do to make it work for that?

Right now I have 6 nvidia cards (mix of 1080/1070) that are on one rig, and 10 AMD cards (mix of 470/480/580) on 3 other motherboards.  I just received a new Z270 mobo I plan to use to condense those 3 into only two, so in the end I will have three motherboards running all of the cards.  I want to use this PSU to drive the 480s on a standalone rig, and possibly two 1060s on a rig I plan to build out of the leftover motherboard/parts I'll have, has anyone done something like this / have suggestions?

Thanks in advance,
DBC

Hi,

Something else to have in mind... how are you going to power the riser cards?
Each riser needs to be powered from the same PSU as the 6-pin or 8-pin pci-e on the card...

1)
Parallel miner also has 6 pin GPU splitters to 8 pin.
http://www.parallelminer.com/product/18awg-pci-e-6pin-to-dual-8-pin-y-splitter-extension-cable-2x-62pin-cable-6in-each-side/
They are also sold on Amazon. Just make sure to get a minimum of 18awg (cable thickness). 20awg is too thin IMO.
Use this to power the card + riser.

2)
No way to tie this with an ATX PSU. This is how you should do it. When you turn on the PC, turn on the server PSU first, then turn on your ATX PSU. When shutting down, do it in opposite order.
I realize this is a pain at first, but after you get everything stable it actually works better.

3)
You could use it to power multiple rigs, but I highly recommend against it. The server PSU can end up powering some of the peripherals on the motherboard. When you need to fully shut down the PC, you have to shut down the server PSU as well. If it's connected to multiple rigs, those rigs will have to be shut down at the same time. I suggest getting the 1200w and using one of those per rig + a ~400W ATX for the mobo and SSD.

As a side note, I placed an order with Parallel miner on 6/1 and still have not received it. It seems they are really backed up.

Excellent, thanks for the feedback.  I'd originally looked at just getting 2 1200w supplies, but they were basically sold out everywhere OR I couldn't find a breakout board for the models that ARE available.

I've seen mixed info on the risers being powered by the same supply as the mobo vs cards, but if need be I can replace my risers with the 6 pin versions.  I think that may be for the best anyway since I realize what you're saying about the power on issue since I can't link to the atx PSU.

I've kept all my rigs between 3 and 5 cards up to this point for simplicity's sake and my own sanity, but I have a few Z270 boards now and could push up to 7 on one, so I think that will be my plan for the weekend and if I can get it running and stable that will be the new home for this guy.

Do any of you have a good link/source for a 1200w that has a breakout board available?  That would be awesome!

Also, I saw the 6-8 pin cables they had after I made the original post and ordered a batch of them :)

I wish PSU cables weren't so damned expensive AND hard to find, doesn't help that they mix their pinouts just to screw with people too  >:(

1200w HP PSU Platinum
http://www.ebay.com/itm/HP-643956-101-660185-001-HSTNS-PD30-DPS-1200SB-A-1200W-PSU-PLATINUM-DL580G8-/332251319954?hash=item4d5bb8ce92:g:3yUAAOSwdGFY0TCV

Breakout board with cables:
http://www.ebay.com/itm/Breakout-Board-w-8x-6-Pin-to-6-2-PCIe-Cables-for-HP-750w-PSU-Ethereum-ETH-GPU-/232124777244?hash=item360bb7031c:g:PYEAAOSwXeJYHhlq

It seems the breakout board are the same ones sold by Parallel miner, so they must have those in stock.

The 6 pin risers are the best.
Molex can only provide 54W MAX
SATA can only provide 50W MAX
6-pin can provide 75W.

Plus, the SATA/Molex connectors usually use the converters, which can be pulled out and are generally of lower quality. The 6-pin has a clip and are less likely to short or burn.

It is by far the safest way to power a riser.

One last thing to note, especially for people using 110V.

the 1200W is max when using 208-240V
This PSU only does 950W max using 100-120V (Standard U.S.)

Also, this is LOUD. Definitely don't want it near any living area.

Just out of curiosity as i'm using that same 1200w psu and breakout board. Is there a way to bypass the push button on the server board so that the psu always comes on when power is applied? Right now I have it powering my gpu's with a 650w evga powering the risers and mobo stuff, but if it locks up and I want to power cycle it remotely I can't power cycle the whole rig, I have to just control the power to the atx psu. There should be either a way to bypass the button and make it always on, or tap into the signal from the atx psu and make it sense when that psu turns on.

You can leave the server PSU on during restarts. I haven't had a problem with it.
I haven't found some way to tie them together, unfortunately.

you can unsolder the button on the breakout board and solder a 12v relay,

Connect the relay to any 4 pin port on the main psu,

So when the mb starts, the relay turns the 1200w on

I never did it, it is just an ideia

I am thinking about buying parallel miner PSUs for my L3+ to come.  How are the reliability of these PSUs?  Also, L3+ are rated at 800W + 10% each, and parallel miner 2400 W claims it can power up to 3 L3+.  Can I reliably do that? Theoretically required power draw from 3 L3+s can be 2400 + 240 = 2640 W.

Thanks.

I have two now and they run flawlessly as best I can tell.  I have them powering two 8-card systems and each hums along, quieter than the cards honestly and I worried about the noise as others have warned of.  I know how server hi-flow fans can sound (the ones that are on these PSUs) and they rarely have had to spin up much at all, however, I have everything on an open air wire shelving unit with an intake and exhaust fan at each end so them and the cards stay pretty chilly.

I wish I'd bought these to begin with honestly, I now have a handful of surplus PSUs that I'm going to pair down and match the cabling up for each so I can resell them soon rather than have them sit and collect dust.  If I build up any more rigs I'll just get another one of these and a small 4-500 watt psu for the mobos like I have now.  The wiring lengths make it A LOT easier to set up your cards where and how you want them too.

Biggest caveat is to make sure you have or buy at the same time the 6-pin PCI powered risers instead of the run of the mill molex/sata type.  I also have an excessive surplus of those thanks to switching entirely to these PSUs too.

You can power your ATX motherboard by buying this:

http://www.parallelminer.com/product/160watt-24pin-atx-power-module-included-sata-molex-cpu-power-connectors-bypass-your-atx-power-supply-entirely/ (http://www.parallelminer.com/product/160watt-24pin-atx-power-module-included-sata-molex-cpu-power-connectors-bypass-your-atx-power-supply-entirely/)

It'll power the motherboard, cpu (4pin), and an SSD via sata.

As for powering the risers, I believe you can power them directly via the 6 pin pci-e connector if you get these risers:

http://www.parallelminer.com/product/ithoo-usb3-0-pci-express-1x-to-16x-extender-riser-card-adapter-w-24-cable/ (http://www.parallelminer.com/product/ithoo-usb3-0-pci-express-1x-to-16x-extender-riser-card-adapter-w-24-cable/)

In theory, you'll only need a single 2400w psu:

http://www.parallelminer.com/product/2400-watt-power-supply-kit-for-gpu-mining-94-efficiency-200-240v-up-to-24-gpu/ (http://www.parallelminer.com/product/2400-watt-power-supply-kit-for-gpu-mining-94-efficiency-200-240v-up-to-24-gpu/)

to power everything. 

I contacted parallel miner to know if the 6 pin sockets from their psu's are 150w or 75w. They couldnt answer me that. Im not sure because with the psu I got the 6pin to 6+2 pin cables, so in theory it should be 150w, right?

Other question: will the gpus work connecting the risers to the atx psu and the gpus to the 2400w psu? If not I would have to wait for another 3 weeks to start the rig, i have currently molex risers....

You need to use PCIe risers with 6-pin PCIe power connectors.

hi,
can I pull 200W from a single pcie from the rev7 board?
I want to use only half the connectors, pulling a total of 1200W or 100Amp to feed my cards. The cable provided is 14AWG so there would be no issues using this cable and putting a 6P -> 2x 8P connector there ... or should I buy 24x 6p->8p adapters?

are you running the PSU at 2400 ? (or close)
mine goes crazy when its close to limit ... I guess its due to the temp but it really goes crazy!

any advice in how to mod the PSU and put bigger fans would be appreciated.

Could you share a picture of your intake / exhaust fan setup?

Using the stock coolers on a wireframe shelf with a box fan at each end set as push/pull out a window.  Room gets close to 90F, cards are pretty stable around 70C, fans on the PSUs never seem to need to really ramp up so they're fairly quiet.  I have the PSUs at the outside with cards in the middle though so the cards are working a little harder to stay cool.

Each 2400 is only pushing 6 cards + risers so i'm certainly not maxing them.  I'd have gone with 1200s but they weren't in stock at the time.

how loud are those ? I had a 1500 wat iMB and it was so loud I had to return it.

I got 2 of the platium 1200 watt ones and they were pretty much silent

what about this 2400 kit ?

I have bought a 40cm box FAN (90w) and it definetly helps. But this is still loud... Im pulling close to 2400W, not sure where to put the PSU.

I think I will try to glue a heatsink to the corner which gets hotter (the one closer to the 2 FANS)

I can try another FAN as exhaust, I guess you just put the box fans in line with the rig between them, right?

Reading these posts makes me want to switch over to server psu's so bad. Should have done it that way in the beginning...

Really liking those 6pin risers. Going to order a handful. Thanks for the link!

I bought one of the 2400w psu with breakout board and mine came with 16 6 pin to 6+2 pin cables I have two of my rigs gpus running off it than I ran the risers and motherboard off 600w psu and I'll tell u I love this 2400w psu also it did take a little longer than expected to get it because of the demand but when it shipped I had it in 2 days

Could you share a pic of your setup?
are you running the PSU close to 100% ?

I got five of these the other day. Installed two today on 1080ti rigs. Will go order another box of five while they last... these are seriously decent PSUs and the cables are simply top-notch. The 16 AWG is really a 16 AWG and I have no doubt the 6-pin cable can handle 200+ watts without breaking a sweat. The insulation on wires is of great quality too!

The fans are getting pretty pretty loud with 8x1080ti pulling ~2,000W. At this price I may as well put two of these 2,400W PSUs per 1080ti rig and run them at 40% capacity. Hope I will find some time to actually try that and measure the efficiency. So far at 900W I seem to get ~96.5%, which is awesome! This was with 2x1080ti + 3x1070. No fan noise either at that level.

The PicoPSU they sell works fine. That flimsy 20AWG CPU cable only carries 0.5A in my setup with a Celeron on Z270, so don't worry about the look of it.

The worst thing is that now I have to sell ~20x ATX PSUs somehow :)

-SCSI

yeah, I have also thought to buy 2 PSU per 3 rigs, that would put the PSUs at 75% capacity.

I have to weigh out if its more efficient / convenient than using a cheap PSU per rig which could feed 1 1080ti + 1 2400PSU per 2 rigs

Yeah... to keep it simple I went and ordered another 12x of these: https://www.parallelminer.com/product/2400-watt-power-supply-kit-for-gpu-mining-94-efficiency-200-240v-ethereum-eth-zec-dash/ (https://www.parallelminer.com/product/2400-watt-power-supply-kit-for-gpu-mining-94-efficiency-200-240v-ethereum-eth-zec-dash/)

After quantity discount and the 5% coupon code (slush) I got $98 price per unit with free shipping. They offer an additional 5% off if you pay with crypto. Can't beat that price for a brand new 2.4kW PSU with 16x high quality 8-pin PCIe outputs.

I also like the factor of redundancy with six (!) fans.

The built-in voltmeter is garbage. It shows 12.3V-12.9V on different breakout boards while the actual output is 12.5V as measured by a proper Fluke DVM. Looks cool though :)

Neat idea! If you do that, I suggest you aim for the recessed area where they put the nameplate sticker. The hottest spot is somewhere near the "2000m" phrase in between the Delta logo and the barcode on the bottom.

Today I opened one of the PSUs just to see if retrofitting a larger external fan will be possible. Looks like it's not an easy task as they designed the guts is such a way that the airflow must travel through the length of the unit and you cannot just open the hood and blow at it perpendicular to the surface. It needs to really penetrate the densely packed internals and your usual quiet case fan just wont cut it. In the area under the sticker I mentioned above they have placed some large silicone thermal pads to provide extra heat transfer capability for the power mos-FETs. The intended application for these PSUs is to be inserted inside a big ass server and some additional cooling of the PSU can be provided by metal-to-metal contact between the PSU case and the server case as they usually mount flush and have minimal air gaps.

I think that if you remove the nameplate sticker completely and use some thermally conductive epoxy to attach a large heatsink, it may actually help quite a bit.

I can pull out my FLIR camera tomorrow and take some pictures in IR when the ambient temps are high. That will pinpoint the hot areas precisely.

Hope the fans are actually thermally controlled and not just ramp up RPMs based on the measured load.

The psu packs looks nice.
How is it with the protection on these 2400w delta psus?
The OVP, UVP, OCP, OPP, SCP, OTP?

The FLIR camera image would be really nice and will help, im sure (i have to buy one of this toys!)

Do you think it would be better to put the PSU elevated using 4 thin columns (more airflow surrounding the PSU) or put it touching metal with conductive  paste? I have the PSU over a large metal shelve, I could use it as a large backplate ...

I was thinking of adding the pico to 2400w psu but my one rig has a fx-8350 I have cpu mining so the question is would that pico handle it probably not or is there a way to run my CPU off the psu being I'm switching everything on in one shot or is that not a good idea I'm not a expert in computer powering so just asking if anyone has done this or knows how thanks

It's usually okay to provide the supplemental 12V power for CPU straight from the PSU. You just need to solder some wires or get a converter.

Also, take a look at this mod which takes care of this exact problem:
https://bitcointalk.org/index.php?topic=2040729.0 (https://bitcointalk.org/index.php?topic=2040729.0)

Speaking of picoPSU, I ordered 10x for $12 e.a. on eBay because $30 becomes kind of expensive at large scale.
www.ebay.com/itm/322652028210 (http://www.ebay.com/itm/322652028210)

Here's the thermals. Fans are lighting up because they breathe in hot air exhaust from another PSU sitting above it (should change that). The peak temp right at the "2000m" spot (around 42C). Remove that sticker and slap a heatsink on it!

https://i.imgur.com/bSIM31o.jpg


This setup currently sits at ~920W. Later will take more pics with other setups.

https://i.imgur.com/L5fPZPQ.jpg

Camera is Seek Thermal for those who wonder.

thanks for sharing the picture!

I did attach a heatsink  directly on the sticker and it definetly helps. But the PSU is still loud ... actually I put a second heatsink to the left of the sticker because that part was getting hotter. Now I can touch the heatsinks and they are warm but not hot (they have also attached fans).

other solution I can think off is puting the PSU on mineral oil ... just the PSU

or maybe run it at 75% and use a supplementary PSU

At the current price of the bare PSU of $65.55 after coupon and with free shipping, you can spread the load between two of them and get down to 50% utilization. I'm pretty certain you can run each PSU with just one breakout board attached, so no need to buy the whole kit, just bare PSU.

yep I contacted ParallelMiner with this exact question and they told me that it would be fine to run with just 1 breakboard. I think I will go this route, thanks!

Yes, but I went with full kits instead. This way, if need be, I will be able to sell them later a little bit easier. Or maybe use them for something different like ASICs and such.

At some point Parallel will run out of this particular model of PSU, because these are factory overstock from some canceled HP order.

I Love HM i have three about to buy two more my farm is building .... taking my time .


mine run close to 75 % ... I never hear the fans on the PSU the fan form either the Rigs or Script miner i hear and the PSU seems to stay cool or like they should .


kind of why I own three I usually go over kill and set a max for me then start with a new one ..


I use one with  a ASICs Script miner that pulls about 1600 watts with five boards ..

O forgot i don't use PCI Express Power Splitter Cable on the GPU rigs any more i plug it all into the PSU break board including the Motherboard .
...

Great thread and information sharing!!

I'm waiting for a 2400W version to show up, and I'm going to fit it into a Rosewill 4U server chassis with 6-8 1080 ti's.
I'll report back on how that all works out :D

You're not alone with that idea! :)

I just tried to do a mock-up and it fits perfectly right above the motherboard. I used the fan mounting screws to attach the PSU to the rear wall. It even clears the ATX PSU, so we can use both at the same time if necessary. Now I just need to punch a hole for the power cord, stuff some fans in there and find more cheap 1080ti's on Craigslist :)

https://i.imgur.com/9MS2lXF.jpg


P.S. ...crap! Now I have to find a buyer for that Corsair AX1500i I was planning on using in this Rosewill case. Damn it Parallel!

Haha...I'm in the same boat and need to offload my Rosewill 1500/1600W PSU's :)

Why are you still going to run the ATX PSU though?
I'm planning on powering the motherboard from the 2400W with their atx-power-module (http://www.parallelminer.com/product/180watt-max-24pin-atx-power-module-included-sata-molex-cpu-power-connectors-ditch-your-atx-power-supply-entirely/)

Yeah, I would say that amount of power capacity is a little overkill.  :D

I just had a pile of PSUs within arms reach so I just rammed one in there to see if it fits. It did :)

I will do 6x 1080ti and at 1,500W the Delta PSU should do just fine and be quiet. Will use Pico PSU for the motherboard and (20+) Corsairs etc. will go to the "for sale" section of the forum over the weekend.

Well...you can technically fit 10 x 1080 ti Founder Edition cards in a rack mount case, and they have been show to pull sustained power consumption in the 3.0-3.2kW range at 100% PL, and even peak to nearly 5.3kw
Patrick over at STH has been playing around with some ridiculously cool Supermicro GPU servers :)
https://www.servethehome.com/category/server-parts/server-systems/

https://www.servethehome.com/wp-content/uploads/2017/07/10x-NVIDIA-GTX-1080-TI-FE-Plus-Mellanox-Top.jpg

https://www.servethehome.com/wp-content/uploads/2017/07/DeepLearning11-Power-Consumption-TF.jpg

Yeah, but he plans doing from 6 to 8 1080 ti's, so 2400W PSU and Pico PSU for ATX plus rest of things is sufficient.

I just think those FE's going to choke sitting so close to each other.

I have one of those, good machines.

I just started using these on the warehouse rigs and can report back that they are working just fine.  Finally got everything setup correctly to run the entire rig off the one 2400w PSU with the ATX adapter.  This greatly reduces cost for the mining rigs as previously I was using a 1600 G2 and a 1000 G3 for each rig.

https://i.imgur.com/9SQ57nv.jpg

Here's a short video showing the PSU in action.

https://www.youtube.com/watch?v=Dq0CyIQWDrk

Here is a link if you want to order one -

http://www.parallelminer.com/?wpam_id=1

The MAX input on these according to the labels are 240V at 13.6 amp.  What kind of breaker/outlet/wire gauge are you using for these in the US?

At full load these are going to pull 10-12A, but remember this is 240v so thats 5-6A on each hot leg. I have 4 of these (they are not running 100%) on a double 30A breaker using 10G wire. Breaker is fine (since max load is 24A), and 10G is rated for 30A as well (just make sure you get the single copper core type).

If some device is pulling 10A from a power source, it will have 10A running through each of two legs. Does not matter if it's 12V 120V or 240V, both wires need to be rated for full current.

The confusion probably comes from the fact that at twice the voltage (240V vs 120V) you need only half the current. But still, if the device is going to pull 10A, it will do it on both legs. No question about it.

Now, to answer the original question. Since this PSU (2400W Delta) is rated at 13.6A max, it needs an AWG14 power cord to run safely at full load. Pretty much any cord with a C19 connector you can find will be at least AWG14.

Note that even if a single AWG16 wire will be fine carrying up to 15A, you need to pick AWG14 if you bundle three of them closely together in a single power cord since they won't be able to dissipate heat as well as a single conductor.

Here's a good info on the current ratings for copper wires: http://www.engineeringtoolbox.com/wire-gauges-d_419.html (http://www.engineeringtoolbox.com/wire-gauges-d_419.html)

I personally run these PSU's at half the load to keep then nice and quiet.

-scsi

I got my Delta 2400W PSU today along with the 32 PCIe 6 pin to 6+2 pin cables.  Since the +2 pins are both ground, it seems to me that it would short out my 1080Ti cards if I plug in the +2 connector to the GPU 8 pin connectors, no?  Aren't the 8 pin PCIe connectors on the graphics cards 2 rows of 4 pins, one row being all GND and the other row being all +12V?

No. The extra 2 pins on the 8-pin PCIE are ground.

https://i.stack.imgur.com/M3aeL.png

I'm not sure why either.

Right, so definitely don't plug them in on the GPU side, right?

What I don't understand is why would parallel miner ship GPU cables that are going to fry your GPUs and/or cables and PSUs if you plug in the +2 connector?

From the top image in your pic, it is pretty clear that pins 5-8 are all 12V and it is obvious from looking at the cables that parallel miner ships, that pins 4 and 5 are both GND.

I mean, what devices out there have pins 1-5 as GND and pins 6-8 as 12V?

I'm not sure if I got your comments right.

http://www.playtool.com/pages/psuconnectors/connectors.html#pciexpress8

8 PCIE is supposed to have 3 of 12V pins and 5 of ground pins. Some fancy PSU will have a few ground pins replaced with sense pins to check the voltage drop at high load.

So the cables you got are supposed to be like that.

Ok, my bad.  I was looking at this 8-pin PCIe extender cable I had and concluded that the connectors on the GPU side were 4x 12V and 4x GND.

http://www.cstone.net/~dk/8pingpu.JPG

So both a 6 pin and 8 pin PCIe cable has 3 current carrying wires in each direction.  I suppose the 8 pin connector has 5 in one direction, but only 3 in the other, so is seems to me the current capacity is limited to what 3 wires can carry.  I guess typically the gauge must be larger on 8 pin cables?  Just seems odd to me why they did it that way.

Don't panic. Those extra 2 pins are not supposed to carry any current. They're there for sensing and conformance to certain standards. Some wacky GPUs don't test for those pins but most proper ones do. If they are not present, the GPU will think you may not have a good enough PSU and won't start at full power or won't start at all.

So, to simplify things, we can say that those two extra pins are there just to tell the GPU that your PSU is beefy enough.

Those AWG16 cables you got from Parallel are beefy enough for a welder. I did cut one open just to see and it had plenty of copper to be called an AWG16.

Thanks.  Yep, worked like a charm, as did the pico.

http://www.cstone.net/~dk/mining_room-03.JPG

http://www.cstone.net/~dk/mining_room-04.JPG

Once I get the last 2 1080Ti's added, I'll make it all look purdy.

Won't be long before I'll max out that 125A sub-panel, lol.

30 amp  pdu works for 2    this is 240 volt pdu.

power cords to the psu are 6 feet 14 gauge

and a pair of size 12 feet


https://i.imgur.com/BZjjJ8b.jpg

This particular 8-pin PCIe power cable is plain wrong because it's made backwards! Those four yellow wires are supposed to carry GROUND at the 8-pin connector end. The proper cable has black (GND) wires entering connector on the side with the latch. This one has it the opposite way. Be careful with them. Most likely they are mislabeled as PCIe cables but in fact are CPU 12V power cables, which have such (opposite) polarity.

I got a few of those from amazon and they are pure garbage.

You may want to try and add a 2nd Delta PSU for 8x 1080ti's. More efficient that way as the fans won't spin at full thrust. I think each can eat up to 10W and with six of them going you will be looking at extra 40-50W in waste.

Also, PSU's maximum efficiency is usually acheived at around 50-60% of total capacity. I don't have the numbers for this particular Delta model to back it up, but most others I've seen suggest that you may save around 2-3% by running them at 50% power cap. Extra PSU is only $79 if I recall correctly.

I think I posted this already, but anyways... :)
https://i.imgur.com/qUqVKS6.jpg

When you max out your sub-panel, you can finally whack those storage arrays and ADCOM's (don't see them from this angle). They don't help with mining profitability. Onkyo can stay. I like Onkyo lol.

Are there long-term miners on server PSUs around here ? How long has your server PSUs been lasting ? Average time before going dead ? Got early deffective ones ?
Due to their almost non-existent warranty time (30 days), I am skeptical to choose them over ATX PSUs which have 10 years warranty as I fear I might need to buy numerous ones over the span of few rigs lifetime cycles, then I am not so sure about actual savings, all things considered (reselling of ATX replacement units of never models in the long run)

They should last longer than consumer grade PSU's.  These are designed to run 24x7 for years on end in servers after all.

delta  is one of the best psu builders around.

I have five so far.

but  I don't push them as they are low cost

130  for  1

vs 300 for an evga 1600 gold

or 379 for an evga 1600 plat.

These Delta's don't seem to like being pushed much past 1800 Watts.  On my 8x 1080Ti rig, I changed power limit from 190W to 210W, and after 4 hours, it shut down.  Miner went offline since I forgot to set the BIOS to power on after "power failure".  Guess I'll pick up some more and run 2 on my 8+ GPU rigs after all.

As Phil pointed out, this is still way cheaper than large EVGA units, and as SCSI2 pointed out, more efficient.  I'll make some custom dual C19 power cords to keep things neat.

some 1080tis go rouge and do 100% tdp

When set lower.

My aorus 1080 ti would often go to 300 watts. Which is its 100% tdp.

It is possible you were pulling more then 2200 watts.

I ran two Avalon 741 pulling 9.8 to 11 amps of 240 volts.

Got hot but kept running.

I now use two psus and the fans are much quieter.

I prefer these to the Evga as I can get three deltas for one Evga 1600 plat

I concur with Phil on Delta's reputation and reliability. It's one of the largest OEM's in the world for industrial power supplies. Most of HP or Dell servers use Delta PSUs and they have been doing it for decades.

I've been dealing with servers (and designing server configurations) for a living for quite some time and for the past 10+ years our typical annualized failure rate (AFR) was less than 0.5% based on many thousands of servers. This 0.5% AFR figure means that if you have a 100 servers and run them 24/7/365, you will end up losing less than one PSU every two years. Most servers use redundant PSUs, so they stick two of them and run at 50% load. In an unlikely event of a single PSU failure, the survivor will be able to sustain 100% load for a long time (days/weeks) with no issues.

-SCSI

well, after query, server PSUs' (refurbished!) resellers are eyeballing a longevity of 1.5 years - 2 years, not more (with some rare cases less than 1 year or above 2 years), past any warranty time in all cases

therefore, considering :
- twice units of server PSUs favoribly run closer to 50% load rather than 90% (ATX)
- zero resale value of server PSUs (dead units) against a resale value of 30%-40% of ATX psus, eventually from a newer model of a replacement during the 10 yr warranty time around year 4-6
- despite a 3% efficiency boost in favor of server PSUs underloaded
...the attractiveness of server PSUs does not look evident
actually in my case (considering electricity costs, shipping costs, etc), ATX psus would appear more cost effective from year 1 to year 10, no matter how I manipulate the figures

(side story, you don't see a giant cloud mining company like Genesis running their GPU rigs from server PSUs but from ATX. Was it studied ?)

Well, actually if you check some of the newer Genesis Mining DC tour videos you will notice them using HP server PSU's to power their rigs.

you can roll with atx's I use them on my lower power builds.

but once you get to a 1200 watt and up build the delta 2400 watt servers are better.

i never build big gpu rigs.

but I do mine some
 avalon 721's
 avalon 741's
bitmain s-9s

nothing seems better for them then the delta 2400 watt gear.

I pull only 1100-1350 watts per psu.
so psu is relaxed so to speak.

no atx really thrives at 1350 watts
I have run 1500 watt roswewill tokamak titanium
I have run 1600 watt evga titanium
I have run 1600 watt evga platinum
I have run 1600 watt evga gold
I have run 1500 axi platinum

none of them really do well on the antminer 14th s-9's

So I've been waiting for Finksy to start selling his power supplies again.

 I have one of each of these power supplies from ebay.  I have only had a chance so far to run the 2,880 one and it works quite well.  In the ebay description they mention that they aren't a fan of power supplies with breakout boards and that connections should be soldered.

For those that have the parallel miner PSUs, how do you think they are compared to these two ebay power supplies?


http://www.ebay.com/itm/Power-Supply-for-Two-x2-Antminer-S9-S7-L3-with-Ready-To-Plug-Harness/182254895754?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2060353.m1438.l2649

http://www.ebay.com/itm/Power-Supply-for-Antminer-L3-110V-or-Antminer-D3-L3-A741-220V-/182723026931?hash=item2a8b241ff3:g:DO8AAOSwP6pZl1DP

one thing I do find a breeze with server PSUs is indeed the connection management. you can go all 6pin risers (no Sata, no Molex), buy them in bulk and there is just less mind computions for managing PSU setups. with ATX you can always some connectors or pin cables depending on the brand & models you associate so there is more studying to undergo prior. some buy ATX based on power capacity alone then realize the units are not equipped properly for their rig need

many atx have this issue.

2400W GPU kits’ prices back to normal : from $119/$159/$189 to $181/$225/$249

how often are discount sales happenings expected ?

out of interest how noisy are these?

At less than 40% load, not bad at all (GPU's make more noise generally speaking).  Once you get around 70%, those tiny fans start getting up there in rpm where you notice them, but they don't really start to "scream" until you get past 80%.

DeepInTheMines just started selling a different breakout board. It looks like it has a floppy 4-pin connector (use Molex adapter). I havent ordered one, but i was looking for a similar solution, and this might work.

How do you trigger reboots with this 2400w PSU and PicoPSU (ATX) adapter?

Does the power switch jumper on the Motherboard still reboot the system or do you have to use the button on the breakout board?

Motherboard switch still does it.
The button on the breakout board turns it on and off as well.

Be aware...I can't get this working with a Biostar TB250PRO motherboard.

I had a similar problem with a couple of PicoPSUs out of ten on Asus Z270E boards. Replaced with a similar 160W pico from a different source and it started to work. Haven't had a chance to investigate much further but I don't think it was the motherboard issue. Could be a combination of factors...

Looks like Parallelminer/Centrix-Int bumped up the price from $60 to $160 - and supplies are limited.   Where else can i buy these PSU's?