Bitcoin Forum

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you can find it at www.bitcoinpsu.eu for Bitcointalk users we have a special discount code:

gives you 20% discount on al products.

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1000w+ (85A) - 8 PCI-e - 90.5% efficient
Suitable for 2/3 of a S7, one Avalon or 2 S5's
In theory it can deliver 1325 watt's however, due to heating it is sold as 1000w

With discount: €60,-

2000w+ (175A) - 10-16x PCI-e
Suitable for up to 1,5 S7, two avalons or four S5's
*It must me noted that this PSU is very loud, about the same of a S7*

With discount: €92,-

2800w+ (240A) - 12x PCI-e
Perfect for a S7 of 1,5 Avalon

With discount: €144,-

3000w+ (255A) - 20-24x PCI-e - 90.5% efficient
This unit consists of 3 1000w PSU's. good for 2 S7's.
All units can be powered on at once.

With discount: €160,-

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http://jeroenburks.nl/efficiencies3.png

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All prices are excluding 21% VAT. However companies can get a delivery without VAT as long as the shipping adres is outside of The Netherlands.

A picture could be nice, interested in seeing how your breakout board looks :) and what kind of Psu's are they ? Power-Rating..Gold, Platinum, ect.

Added an image, thanks :)

As far as I know server PSU's don't have these ratings.
Efficiencies are around 92-94% usually

Ok that's would be Platinum I think. Btw. nice work :D

Are these strictly 220-240v or do they also run at 110-120v?

Never mind I think I found them and they only run about 630W on 120v.

Image is not visible .

for me is fine the image!

how is the noise on this psus, i don’t see a fan!?

you may want to consider making the 1.3kw more compatible with s7.....

Jup, so not that usefull unfortunately...


Fixed :)



There is a fan in the back
https://www.google.nl/search?q=1300W+XSERIES&safe=off&biw=1680&bih=949&tbm=isch&source=lnms&sa=X&ved=0CAYQ_AUoAWoVChMIhN_m8Yn7xwIVw1caCh3HiA0w

It's quite large for a server PSU (that is the reason these are selected)

What do you mean? adding 2 PCI-e ports?
that is easier said than done unfortunately.

If you would wire it like this it should work fine
http://s29.postimg.org/6wiq2cp9v/1300w.jpg (http://postimg.org/image/6wiq2cp9v/)

now the load of the 3 blades is equally distributed over the 4x 12AWG cables...

looks good to me too, also the 16awg is a good choice!

how is the noise with that fan?

I made a short video of the miner with a Monarch connected (400w)

The phone has noise anceling I think since there is more noise than you can hear in the video...
https://youtu.be/XE-TaWR3uQQ

I think noise level is around an S3, maybe slightly more. A lot lower than an S5 or the DPS-1200

In stock

1300W IBM	81
900W Dell	03

I'm looking for someone with an S7 to test how well the 1300w runs it.

I'll give a nice discount for a small review
(and if it doesn't work well I'll take the unit back, on my cost  :))

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stock

1300W IBM	8 1
900W Dell	03 0

any new power supplies in the future?

the 1300w with 10 pci-e is perfect for s7 ;D

I made a 10x PCI-e version

De prijzen

10x pci-e
1+ €   80
10+ € 75

8x pci-e
1+ €   75
10+ € 70


Payment in cash, BTC or paypal (+3%)
Pickup in Venlo, 3 km's from german border

http://s14.postimg.org/ueuzqmztt/2015_11_09_21_19_00.jpg (http://postimg.org/image/js16l7rod/full/)
http://s16.postimg.org/szhvy855h/1300w.jpg (http://postimg.org/image/de0ke9t75/full/)

And delivered this morning.
Have fun with them :)

J

Bought 2 x 1300w with 8 pcie for some of my s5's and i have to say that they work perfect .

Yes. I got 3 x PSU as herein in the picture. All are working fine.

http://s14.postimg.org/ueuzqmztt/2015_11_09_21_19_00.jpg (http://s14.postimg.org/ueuzqmztt/2015_11_09_21_19_00.jpg)
Click to enlarge

I recently bought a set of 1440w power supplies for the increasing power need of the S7.

Unfortunately, the PSU's refuse to deliver more than 1200w for a longer period of time in a warm environment.
So I'm now selling them as 1000w power supplies. 1 can run 1,5 S5 | 2/3rd of S7 | 3/4th  of a avalon.
Each PSU comes with 8x PCI-e, so you can easily connect 2x S7 on 3 PSU's

prices
1+: €55
3+: €50
10+ €45

EU shipping/escrow welcome

Why Bitcoin +1%?

Hoi!

What temperature is that warm environment?

I can give it 10c, or just put it in a shed where is ~0c

Groetjes,
mav

I buy the PSU's & cables in euro.

there are 2 reasons the price is +1%
- btc/eur rate is volatile, so it covers some of the risk
- conversion isn't free (usually a percentage of the amount)

Does these 1300w server  psu's work well with S7 miners ? ???

no, that's why I swithed to a heavier PSU

warm i mean 30+
One customers has them running at 20c and sometimes they fail... (dunno frequency/ precise temps)
I can make a version with 10 connectors, but I cannot guarantee it will be able to pull a S7 all by itself...

regards

Bitmain suggests 1600w+  for S7 miner :'(

1300 Watt IBM still in stock as the OP says?

Why do they fail? Cuz your customer tries to pull over 1300 watt??

It would also be nice a to see a efficiency curve because highest efficiency is usually only available at 50% load.

1300 watt not on stock anymore.

I'm working on a cheaper board for the 2880w IBM PSU as wel as a smaller PSU (1300w+)

At the moment I only have the 1440watts on stock.

About efficiency, I just bought this baby: https://www.elektor.com/voltcraft-digital-clamp-multimeter-vc-330
This week I will be measuring effciencies of the smaller PSU's

yep great way to test efficiency

compare your 240volt ac amperage to your total 12v dc amperage.

The difference determines your efficiency.

Looking forward to seeing your "real life" numbers.

I noticed just now that you have 1440 Watt PSUs in stock?

I would be interested in 2 of these 1440 Watt units, any details?

Shipment would be Europe, specifically Austria.

Will one 900W Dell PSU be able to run 2 Antminer S3+ miners?

If so will I still be able to overclock one miner since there are six 6-pin PCI-E cables coming with a single PSU. I will connect 4 of them with one miner that I want to overclock and I will run the other one normally with 2 of the remaining cables.

Also I noted that the shipping cost to India is nearly double of the miner = € 52,59 :'(
Can I get some discounted quote on this deal please?

Unfortunately, I forgot a phenomena: "power factor"
So now I've got this baby: http://www.conrad.com/ce/en/product/1340670/VOLTCRAFT-4500PRO-DE-9999-hrs

This weekend I'm going to do some experiments with a Bitmaintech, 2880 and my new PSU.


Normally I supply them with 8x PSU (10x PSU is +5 euro)
Depending on the temperature they will do between 1000w and 1400w

shipping for 2 is about 20 euro.

I don't have the 900's anymore. I would advise a 1440w.
Than you can overclock both S3+'s

shipping for 1 is still 35 :s

8 pci-e 1440w unit is fine for me

I would take 2 units


But I would appreciate an efficiency test first.  :P


(You can cut open the power cable "enclosure" and test the ac current-in that way.)

Ok, so first test results are in:

Summary
The bitmaintech is really efficient with around 93,9-93,5% efficiency on a S7 batch 8. The new 1300+w PSU that I’m working on reaches about 89,5%. I did not fully test a 2880 with j4bber board, but on first sight, it is even more inefficient.

Testing procedure
I’ve hooked both PSU up to a Batch 8 S7. Next to that I tested: 1-4x S1 on the 1300+, 4x S1 on the 1440 and 2880 with jabber board on 1x S7 Batch 8 & 1x S7 batch 7.

- All measuring has being done with a Voltcraft 4500 Advanced powermeter, a Voltcraft VC-330 powerclamp and a Tenma 72-7725
- Voltages were measured at PCI-e plug.
- Time intervals was 10 and 20 min.

Results S7 batch 8
http://bitcoinpsu.eu/img/bitmainvs.png

Next to that I tested the efficiency with some antminer S1's as load.
- tested with 1/2/3/3,5/4 x S1 on full speed
http://bitcoinpsu.eu/img/1300.png

The 1400 got around 88% and the J4bberwock with 2880 drew 2875w for a S7 Batch 8 and a S7 batch unknown.
If there is enough interest I will test more PSU's
And if you have measurement wishes, please let me know!

regards

Ah nice numbers for the bitmaintech. (good efficiency)

I would like to order 2 units of the bitmaintech. (how many pci-e plugs?)

Are you doing escrow? and if, with whom?

Shipping is to: AUSTRIA

Haha, unfortunately, I don't sell those (yet)

And still, before you have them here, you're looking at 145-160 euro per PSU without sales tax, so that efficiency comes at a price :S

That price per unit is totally fine for me if the peak efficiency is as good as you say. (93-94%)

 ;D


Actually I don't care about the single PSU wattage.

I just need about 2500+ watt at high efficiency for now. (maybe more in future)

The units can be as low as 900 watt or as high as 2880 watt ... I simply order that much units to fill my "wattage" needs.


(yes i know NOT to plug different psus to one and the same device
due to slight voltage difference of each unit/load)

I can make of 3 PSU's for 2x S7
That case the PSU will be around 92-93% efficient.

3x ~900watt?

If they deliver 93+% peak efficiency I'll take them.

 :)

When do you need them?
Early next week I can test the actual efficiency for you.

Within 10 to 15 working days would be ok. (the sooner the better)

I appreciate it that you do an efficiency test beforehand.

any news?

Just got them in.
I will test it with 2, 2.5 and 3x S1

When running 3 PSU's on 2 miner
2x 103A = 206A
206/3 = 69A per PSU
69x12 = 828W per PSU
A S1 is about 350w --> 2.4 x S1 should be the same load

results: Tonight!

Unfortunately my power meter broke a couple of days ago.
When I test it with the Amp meter i get somewhere between 90 and 92% with 2,5 S1's attached....

I bought a new power meter, hopefully it arrives before the weekend...

BTW: I just finished my webshop: http://www.bitcoinpsu.eu/ I hope you gys like it :)

regards

Wow, these 2000 watt units are appealing  :o

Running 2 units at 75% to 80% (1500 to 1600 watt) from one breaker seems ideal.
(at least for me, I have exactly one double cable = 2 plugs to each 240v/15a breaker, max 3600 watt)

At 75% they should normally run at PEAK efficiency as well.



Very nice page you have.

Efficiency numbers for each unit would be great of course.
If you can eg. load test 60 % or up to 80% on each unit, that should be enough to provide useable numbers.




Moreover I never checked what protection features these units offer:

Some very crucial ones are:

1. SCP (short circuit protection = MOST important, can save your life  ;D  )

2. OVP (over voltage protection)

3. OCP or OPP (over current/power protection)
This one isn't that important with HUGE single rail PSUs which I assume they all are.

4. OTP (over temp protection)



btw on your page I didn't find these 900 watt units you talked about ...

Yesterday the new meter came in and I deliverd the first 25 PSU's.

The customer has some S7's (batch 8) and bitmaintech PSU's

2x Bitmaintech: 2672
3x 1300w+: 2792w

So the Bitmaintech is still 4% more efficient :s

Id did some extra measurements with the new powermeter

https://i.imgur.com/FFFDALD.png
What I noticed about the 2880w power supply: As soon as the fans spin up, the usage increases about 30w (and that is already with 2x S1, not even full fan speed).

You can't compare the efficiency if you don't take the total wattage of the PSU into account.

If you test each unit at approximately 70% load then you can compare them.

1300 watt test @ ~  900 load
2000 watt test @ ~1400 load
2880 watt test @ ~2000 load


I'm sorry to bother you that much but I do believe many customers would like to know anyway.


Moreover I thought MOST server PSUs delivery platine or even titanium efficiency yet the numbers you provide are hardly even gold efficiency.

I heard of 94-96% efficiency server units, which are they?

Well, Efficiency is basically OUT/IN.
In the end, you have a load which needs to be powered. It doesn't matter if you do that with a 2880w PSU or a bunch of 900w PSU's.

This week I'll extend the measurements up to 6x S1.
I will add a 1100w ATX PSU to the test.
To be honest, I expected higher efficiency as well :) If you have a suggestion, let me know so I can test them the same way...

uhm that's quite wrong sorry ... it matters VERY much if you care about efficiency ... otherwise it's true yes

The efficiency is a curve which normally peaks around 60 to 75 % load of the PSU.

Outside that load the psu efficiency is WAY worse!!!

You can actually see it in your chart the efficiency for the large units climbed and it would climb further if you applied more load up to ~75% where it would slightly go down again.
So without a 2000watt+ load you wont find out the true efficiency of your 2880 watt unit.

I think you misunderstood what I said.

I completely agree with you on the fact that efficiency is a function of the drawn wattage.

However: you can approach a situation from 2 vieuws:
- the PSU is most efficient at 70%, so I will seek a load that is 70%
- I have a load of X, how efficient is each PSU on that load.
I prefer the latter, that is why I will test all PSU's at the whole spectrum of loads.

with 6x S1 we will draw 2160w, enough to test all PSU's

The 2880 is a silver psu.

The 2980 is a platinum psu.

They both use the same fans and the fans pull close to 60 watts.

In hardware section I did a fan mod to the 2980's and they give true platinum numbers.

I am on an iPad I will post link to the fan mod later.

As I type I am running five Avalon 6    miners using 4800 watts on a pair of modded 2980 psu's

We need a psu ~1500watt for last s7 batches.....

the 2980 or 2880 with the fan mod saves 40 watts

lot of photos on the fan mod.

https://bitcointalk.org/index.php?topic=1284563.msg13708402#msg13708402

The power rating on a PSU is based on the output, not the input...
So if 1500w goes in, only 1350 comes out (at 90%)

It looks like a nice build, but I think it's going to be difficult to give a warranty on that :S
Unfortunately, the 2980 PSU's a quite expensive 

Today I tested with up to 5x S1, here the results

http://s18.postimg.org/yooe8a1tl/efficiencies2.png

These server PSU's deliver 12.2 volt afaik.

If you calculate with 12.2 volt instead of 12.0 the efficiency is slightly higher (~1%).

I calculated it with the actual voltage, but since voltages differ across PSU's and load, I didn't post all those values ;)

This list includes the efficiency standards for supermicro PSUs:

http://www.supermicro.com/support/resources/pws/

The website is live: www.bitcoinpsu.eu

with the following discount code: you get 20% discount

Some of the products

1000w+ (85A) - 8 PCI-e - 90.5% efficient
Suitable for 2/3 of a S7, one Avalon or 2 S5's
In theory it can deliver 1325 watt's however, due to heating it is sold as 1000w

With discount: €60,-

2000w+ (175A) - 10-16x PCI-e
Suitable for up to 1,5 S7, two avalons or four S5's
*It must me noted that this PSU is very loud, about the same of a S7*

With discount: €92,-

2800w+ (240A) - 12x PCI-e
Perfect for a S7 of 1,5 Avalon

With discount: €144,-

3000w+ (255A) - 20-24x PCI-e - 90.5% efficient
This unit consists of 3 1000w PSU's. good for 2 S7's.
All units can be powered on at once.

With discount: €160,-

Discount code is not working

What product did you select?

Sorry can't see the image.
Selected 2000w and also 3000w. There is no difference in the price when I enter the code

Is that discount only available for Netherlands? I am in UK and I was looking for large psus.

nope, just tested it.....

the dicount code is case sensitive though.

"iloveBCT"

shipping adress, method and payment method shoudn't matter...

what browser are you on?

Thanks It worked. Order placed

just placed an order for 1x 1000W PSU for 2 S3+.

=========
And shipped the same day.
Just wow.

Will update when I get it.

Thank you

So ordered the following:


Ran 2 S3+ @freq 250 for 4h: no issues

Will try tomorrow with 2 S5 @freq 350

Great packaging, PSU seems robust and cabling is well done and cables are long.

3000W PSU received last week it was well packed. running 2 S7s no issues. great job with the cabling