Topic: Kkmoon 2600w Dual Server PSU ATX (Read 1215 times)

When you setup your farm, connect 264 cards and then cant overclock anymore because of power issue, its a huge deal not to get the advt power.
Its so much of work to replace these on 22 rigs when every single card is stable and running (only at heavy undervolt though)

-Jay

I spent 109€ to get one PSU, one breakout board and 8 cables. Shipped.

Plus breakout boards plus cables .

Yeah, and a solo 1200 W HP PSU is $50-100, so...

True that. But an item that is advertised as providing up to 2600w and cannot really do that is still a scammy move in my eyes.

Honestly 1600Watts for under 200 on ebay isn't too bad.

Yeah, I would try them with normal breakout boards. Maybe this helps indeed. Keep us posted if you see any improvements.

Dont be a smart ass. Everyone knows about 110v/220V.
These PSU wont support more than 1600W even at 240V. I have a 400A 240V setup for my farm.

If you are on 110V, those PSUs can handle up to 900W each. 1200W is for 220V only.

After buying and running 22 of these... I can confirm....
THESE WONT HANDLE MORE THAN 1600W, FML.

Despite having 2x 1200W DPS 1200FB, it feels like they have fucked up with load balancing. Each one from different mfr has same issue. Now I need to find how to fix the issue or just throw away the breakout board assy and put normal breakout boards.

Any suggestions on that?

I use similar ones. I only run it at around 1300W from the wall. The efficiency is about 94%. So it is quite good.

Well maybe some are plat, the one i got weren't, so it's probably lottery.

Also i use 220v electrical outlets im in europe. But again i wasn't able to check this "limit" maybe it's BS.

From googling it appears these are platinum supplies.  Doesn't really bother me either way as the power cost is not really that different.  1800 watt would be the top for 120V, is that what people are comparing?

Hello guys,

Well at first glance this PSU was promising, but after a few days of testings here are the issues with it.

- Announced as 2600w psu but is only 2x1200 (2400w)
- Rated as platinium but it's obviously HP gold psu's (according to serial/model numbers) (i also compared the same system plugged on this psu, and on a normal platinium psu and the 2-3% difference are here)
- I didn't experienced it myself because i don't have a rig that can pull more than 1400W, but it was reported it can be bad to maintain power above 1800w, for a 2400w psu it's not really good.
- The overall electronic quality of the PCB isn't very good, the cabling is OK, but the rest is a kinda sloppy (for this kind of price it's not THAT bad per se)

Other than that my 1400w rig seems to have behaved properly with it. But again i was using it only @about 60% load, that's not really pushing it.

Conclusion : it's not THAT bad of a price and performance for a 1800w gold rated psu, there is plenty of connectors and such, but only for the fact they lied about the product (2600w platinium) im sending back my unit. So it's back to amazon for me sadly.

didn't have much time yesterday, but I did plug the powersupply into the motherboard and it did post.  Honestly even if it does a fair amount less than the rated power, its still a good buy at least for the price I got it for on Ebay.  I assume too that worse comes to worse these could just be plugged into breakout boards with another small power supply doing the motherboard if you really need full power.

Looking at the pictures just now, I see the 24pin and CPU cable are being held together with exactly the same stretchy string as mine was.  I'd say if anyone goes with these they should probably get them on ebay.  99% sure they are the same supply for 80 dollars cheaper or so.

...because their step down converter fucks is up?

I dunno.

Confused, if there are 2 1200 watt supplies, how could it only handle 1700W?

There's a recent feedback:

Please tell us how yours behave under heavy load.



In the meantime, has anyone tried their ATX power supply?

Very likely, yes.
I wonder how many amps the 5V has to deliver. Probably not much.

It appears USPS has lost my motherboard so no testing yet.

Does anyone know how they get the 5V off of supplies that only do 12V?  I'm assuming they have a converter in there?

any news on this?  Mine is arriving today.  Different seller but almost identical to this one.

Received mine today.  I didn't pull it apart like previous poster but I did pull out one of the supplies and it is the same supply as shown in the picture above.  I paid like 180 from Ebay. I hope the stupid thing works.  Still waiting for motherboard and cpu.

Yup it's promising, i will keep you all updated as soon as i made more testings, measurements and stuff, will probably go the safe way first with my test rig that has only one card, then if stable, i'll hook it up to one of my 6x gpu rig that use a double PSU. We'll see how it goes !

As youve said its not too bad. It maybe a very good alternative to a dual psu setup and remove the need for the pico aswell.

Update us when its on a rig (and what rig its powering) 

a few pictures until i make my testing




























As you can see, there are good things (cable lenghts/quality) and some things a bit sloppier (like the soldering under the main PCB, they're good solder (not hollow or else) but not very cleanly done.)

for those interested in the full size gallery https://imgur.com/a/yqq8D

https://pp.userapi.com/c841524/v841524013/564bb/uKOWSu9nOkI.jpg

^ ASRock H110 Pro BTC+ powered by one of these PSUs.

Yes that was already my idea, to mesure it

You can measure the 12VDC value and its ripple then :-)

Yes im also curious how it run, i'll try it over the week-end on my test rig, we'll see how it goes.


Multimeter yes, oscilloscope no (i wouldn't know how to use it anyway xD)

I'm just very curious to see if its going to run the motherboard as all the pico issues seem to be from them passing the server 12V through the pico and the 12V from the server supply is like 12.5V so the motherboards won't start.  I'm sure the Chinese figured that out though.  They make a lot of junk but a lot of innovative things as well.

That's cool. Do you have some equipment (multimeter, oscilloscope) to feed us some data?

Hello,

Just got the PSU today in the mail, it was 160€, delivered by UPS (bought it on amazon, shipping was free), here is what i have to report so far.

- Clean build, pretty sturdy feeling/looking, well assembled.

- 2x 1200W HP power supply (model DPS-1200FB A / HSTNS-PD11), used of course but looking great and clean (i disassembled one, it look like new inside and outside, even "smell" new, wondering if it's not new but i doubt it), it's not a 2600W PSU, more like 2400W, the fans seems to have been replaced (not the brand you usually see in pictures)

- Disassembled the enclosure to see the connectors and PCB inside, look pretty great, soldering is clean and everything seems to be well built.

- 8x GPU cables built with 2x 12AWG cables departing from each PSU PCB for power load balancing, each GPU cables has 3x 6+2pins PCI-E power connectors each with 2x3 18AWG cables to each connectors coming from the 2x 12 AWG cables to spread out the power load.

- 24pin ATX cable + 8pin GPU cable on one 2x 12AWG power cable (again with the load splitted)

- 1x3 molex and 3x3 sata coming from 2x 12AWG power cable (again with the load splitted), splitted in 4 cables with 3x connectors on it.

- All the plastic connectors by themselves look OK, not the highest quality (pretty normal for this price range) but i saw alot worse. Should work !

Questions i have now

- Is the 18 AWG a good choice ? i think so because with the power equal sharing it should perform well. And that's what you see for most ATX PSU's.

- Why announce it as 2600W when it's clearly 2400W did i miss something, i doubt it, probably a mistake on their part. well 2400W is still plenty.

- Are the PSU's really platinum, since the model number i found is DPS-1200FB A and the model i saw on the internet are DPS-1200FB-1 A, i found a post here saying that the -1 mean that it's a platinum PSU where as when you don't have the -1 there is no power efficiency certification. If someone got more information, i'll be interested.

I will come back with rig testings, feedbacks, and pictures over the week-end. Im in no way an electronic expert so giving out as much as i can with my limited knowledge.

Still waiting for mine, should be a week or two, we'll know more by then  

And yes it's HP psu's so i don't have any worries, only the case like you stated.

Also 2000w from outlet is fine if you have the right amps (i can run 220v @ 10amps for 2200W or 16amps @ 3520W) Dunno for US that run 110v but it all depend on the amps.

The server psus inside are HP common slot ones so can be any efficiency they do. Thats unless you dont believe HP are providing the wuoted efficiency ratings either?  

The build quality of the case/wiring harnes would be in question though and hence my initial post asking if anyone had/has one and what its like.

It won't put out 2600 watts at 120v.  More like 2000 or a little less.

which psu?  the server supply or the pico?

Yes, these are my concerns as well. I've seen ATX PSUs from China that claimed to have passive PFC, for example, and it turned out there was a piece of cement shaped and painted to look like a PFC choke inside. 


Yep, you'd want (probably need) to use 220-240VAC for this. In the US the maximum continuous load allowed on any one outlet in a branch circuit is 80% of the wiring rating. If the wire is 12 AWG then that is 80% of 20A, or 16A, and 16A * 120V = 1920W. Note that this is power at the outlet; you have to multiply by PSU efficiency to find out how much useful output power is allowed. If it really is 80+ Platinum (95% efficiency) then you could theoretically draw 1824W from its output.

At first glance this PSU may look awesome but my primary worry about this kind of PSU is the build quality and power efficiency. Is it really 80+ platinum? I've seen some china made PSU with 80+ gold stickers which were obviously faked. My next worry would be my power outlet / extension cord. Isn't running at more than 2000 watts in a single socket considered dangerous?

I only use Bitmain PSUs now.

I have 20+ Server PSUs I need to move.

I am using this PSU with ASUS B250 Mining Expert MB. it works fine.

The hdplex will work because it regulates the voltage to 12V as can be seen by input voltage being 16 volts plus.  The other Pico just take the input voltage and the server supplies put out 12.5 volts or a little more so most motherboards aren't going to work from what I read.

Does anyone have a solution to this?  I read on parallel miner that one person used a dc to dc converter to drop the volts down, but all the dc-dc converters say input voltage has to be 1 volt higher than output voltage so if input is 12.5v, your output is now 11.5v.  I don't know how a motherboard would work on that?

Problem with the hdplex is that for the price of 98 dollars, its cheaper to just use an ATX supply

Are you using the 4pin or 8pin EPS to power the mobo? The pico cannot power the mobo by itself.

Is there an adaptor for server PSU to ATX 24 pin? None of the break out boards I have seen, have 24 pin coming off them. And you still need cable to power SSD and CPU.

The PICO almost certainly lets the 12V from the server PSU pass through it on the way to the mobo. It just generates the 5V, 3.3V, -12V and 5V-standby rails required by the ATX specification.

Yep, but its not a PICO issue, but with server PSU.


Problem:
i got 6 of the 180W version and 2 of the 160W version , and tried for 2 different mainboard with the 180W one

Asus B250 mining expert, the board cannot power up if there is 10 or more GPU connected ( of coz, GPU power by the X8 board itself )
so useless for this board

Biostar TB250-BTC Pro,
it is good, to use with 9 GPU ( again ,GPU power by X8 ) on this board , what a great product
however, it only stands for around an hour
the attached “12V PCIe cable power adapter” burned ( at the end which connect to the ATX module )
at first i think it may be because that cable has some problem,
so i change to use another one set , the “12V PCIe cable power adapter” burned again

now , i have 6 of 180W, 2 of 160W of this cable for nothing,
costed me USD362 before import tax and shipping for nothing
lucky at that moment i am around , otherwise, it cost much much more than that

so , conclusion is ,
use standard ATX power supply for the mainboard for your own safety ,
and leave the X8 for the GPU only


Response from PICO:

Hi Victor,

While troubleshooting for another customer who ordered the 180w adapter and our 2400w power supply kit we came to find that because the Delta 2400w power supply has an output voltage rating of 12.5v, vs 12v from standard power supplies that the Asus B250 motherboard bios settings will not allow the motherboard to boot properly if the voltage exceeds the max voltage threshold. So you are correct, for specifically the Asus B250 you would would want to use our power supply kit only for the GPUs.

As for the ATX adapter cable burning up after about an hour of use, we will need to look into this further to determine what the issue was. Please feel free to email me at Albert.s - at -centrix-intl.com or call me at 9094803000 ext 115 for more details. We can still set you up with a return for a full refund on the ATX adapters.

Thank you.

Yes except if you read at one of the sites that sells this, you'll see from the comments that it doesn't work correctly on many of the mining boards especially the asus mining expert.  something about the voltage is slightly too high.

Well, that`s brilliant then! No point using expensive branded PSU`s costing 400, server PSU +PICO is ideal combo.

By the way, there is similar product:
https://www.hdplex.com/hdplex-160w-dc-atx-power-supply-16v-24v-wide-range-voltage-input.html

Pico psu is a small DC-DC psu unit.

The power input voltage is 12VDC.

See this video for a thorough build example https://www.youtube.com/watch?v=FnHlqWUHLAI

But isn`t PICO AC-DC unit? It takes AC, converts it into DC which then goes into mb, ssd, cpu. Server PSU provides DC - how can it power PICO? I`m not understanding something here.

PICO is one option (cute thing - doesn't look terribly robust or well-designed, but cute nonetheless) or just use a regular ATX PSU for the mobo and other devices, and only use the server PSU to power the PCIe power inlets on the cards. The only trick is to turn on the server PSU first, then the ATX PSU (it may be ok to turn them on and off together - it won't hurt anything to try, worst that should happen is Windows might lock up if mobo power rises faster than PCIe).

No Pico PSU's only need a 6pin power socket on the breakout board of your server PSU to power it up. Look @ the picture on parallels miner you'll see.

For me the matter of this Kkmoon 2600w Dual Server PSU ATX enclosure is that it bring everything in one enclosure, is available for quite cheap, and i don't have to worry about shipping, $ > € conversion, customs import tax. Also most server psu's are pretty much out of stock everywhere... So i really hope it's going to be a good one !

And how would you advise to power mobo, cpu, ssd? PICO is one of the options, but it needs its own PSU as well...

I will get it between 13th and 23th january, and post my feedbacks then. Keep tuned  

any news about this psu?

Don't know how much savings, by the time you buy a breakout board, cables, pico supply and servers, its probably cheaper this way.

Ordered one to test it out, will be here in about 2 weeks, we'll see  , i'll give my feedbacks here for those that are interested.

Sounds like the main advantage over buying ordinary server supplies and tinkering with them all by yourself...hence the price difference

As far as I know yes. But I have no experience with this type of unit. Only ATX and server psu with breakout boards and picos

Sorry to be stupid, but just to be clear, with something like this, you plug it in, attach to mother board and graphics cards and it just runs?  No additional tweaking, soldering wires, tricking it to turn on etc?

No idea to be honest. The cheap chinese stuff is all a gamble. At least with the dual server psu type you know that youcan swap out the psus for good quality ones and the only failure area is the connectors and the cabling provide by the manufacturer of the unit

https://www.ebay.com/itm/2400W-Mining-Power-Supply-For-Antminer-ETH-ZEC-S7-S9-Bitcoin-Miners-110V-240V/352212337249?hash=item52017dc261:g:ZK4AAOSwySlaDrwQ

So whats different between those and this?  Should I stick to ones that clearly look like dual server supplies?

Look exactly the same. Just a different chinese brand.

https://www.ebay.com/itm/2800W-12GPU-24Pin-Mining-Power-Supply-For-Eth-Rig-Ethereum-Bitcoin-Miner-90-PLUS/112691280351?hash=item1a3cec79df:g:hLsAAOSwLYBaMx1D

Isn't this same thing?

I've built more than 10 12GPU-rigs with these PSUs.
They are good. Just as described.

According to reading parallel miner site the pico supply doesn't work with a number of boards.  Frankly it seems to be most of them, so these server power supplies that have the motherboard power built in look intriguing.

I depend where you live, in europe it's hard to supply server psu's that are compatible with breakout boards, or breakout board at all for that matter, all known sites like parallel miners are out of stock of everything... Hence why i was looking @ this alternative.

It's also cheaper, a 2400w psu kit is 185$ + Pico PSU 50$ (+ shipping to europe + customs (30% Tax)) when this 2600w KKmoon kit is 180$ - no need for Pico Psu - free shipping - no customs. So im EXTREMELY interested  


Oh nice i didn't noticed this from the pictures Oo. Makes it even more interesting, you don't even need a Pico Psu too !

You need ONE OF THIS with server psu to power you mobo

I will dont trust this, but use a more simplistic way.

I just bought Dell 1100W server power supply and it will rock (as any Dell/HP 750-1200 W PSU).

You just need to have some electro skills...

They are:
1) cheap (30-60 USD) (1/3 of normal supply)
2) made for 24/7
3) high power efficient (around 92% or more =  80 Plus Platinum and better)

Limitation is, that only making 12 V, so you still need "normal" PC PSU to power MB or some other way how to power it...

Take a look at the Amazon UK Link, it clearly shows two HP 1200w Server PSUs NOT cheap chinese crap. Its the case im more interested it. Its just a housing to hold two common slot psu’s.

https://www.amazon.co.uk/KKmoon-Switching-Anti-electromagnetic-Interference-Efficiency/dp/B075S529TC

Oh, lawd... don't buy that POS... "KKmoon"?!?*

You can get 750W - 1200W HP server PSUs - which are built like the proverbial brick shithouse - for $25 - $50 all day long. Or better yet, get a PSU, breakout board and cables from Parallel Miner or the like and save money as well as aggravation.



* - I am an EE that designs switching power supplies (so far up to 1.2 MW - as in, 1,200,000 W) for a living.

2400W HP server supplies are half the price, usually

These are 2 1300w Psu put together, they are server Psu, i would buy without fear

That's nice to know!

Ohhhh don't believe that, i work in datacenters and i saw so many shit cheap PSU's coming from china boasting nice specs, and being totally crap, but they wanted to save a bit of money, what a hassle it was, that's why im extremely prudent with such specs for this low price. Also those have been obviously modded to be used for mining so im being even more prudent. But maybe they're good, and if someone already got some that can share experience it would be great 

Well, if they actually use these for servers then the quality has to be good

Picked out my server PSU from here https://www.parallelminer.com/product-category/power-supply-kit/

I would also be interested by feedbacks on this, i can get them really cheap and that's what im afraid of for the component quality 

Hey guys,

Just curious but has anyone used one of these before?

https://www.amazon.com/KKmoon-Switching-Efficiency-Ethereum-90-260V/dp/B075S91BKH

Looks like a great idea but it doesnt really give much detail about the cabling or internal components.