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Topic: [ANN] Selling Server PSU's with PCI-e cable (Read 4417 times)

full member
Activity: 157
Merit: 100
April 05, 2016, 01:16:03 PM
#69
3000W PSU received last week it was well packed. running 2 S7s no issues. great job with the cabling
zOU
hero member
Activity: 728
Merit: 500
★ these are stars ★
So ordered the following:

Quote
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,-

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.
zOU
hero member
Activity: 728
Merit: 500
★ these are stars ★
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
full member
Activity: 157
Merit: 100
Thanks It worked. Order placed
sr. member
Activity: 303
Merit: 250
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?

full member
Activity: 157
Merit: 100
Is that discount only available for Netherlands? I am in UK and I was looking for large psus.
full member
Activity: 157
Merit: 100
A little update

...

with the following discount code:
Code:
iloveBCT
you get 20% discount

...


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
sr. member
Activity: 303
Merit: 250
A little update

...

with the following discount code:
Code:
iloveBCT
you get 20% discount

...


Discount code is not working

What product did you select?
full member
Activity: 157
Merit: 100
A little update

The website is live: www.bitcoinpsu.eu

with the following discount code:
Code:
iloveBCT
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
sr. member
Activity: 303
Merit: 250
A little update

The website is live: www.bitcoinpsu.eu

with the following discount code:
Code:
iloveBCT
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,-
sr. member
Activity: 506
Merit: 252
This list includes the efficiency standards for supermicro PSUs:

http://www.supermicro.com/support/resources/pws/
sr. member
Activity: 303
Merit: 250
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 Wink
sr. member
Activity: 506
Merit: 252
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%).
sr. member
Activity: 303
Merit: 250
Today I tested with up to 5x S1, here the results

sr. member
Activity: 303
Merit: 250
We need a psu ~1500watt for last s7 batches.....
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%)

the 2980 or 2880 with the fan mod saves 40 watts

lot of photos on the fan mod.

https://bitcointalksearch.org/topic/m.13708402
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 
legendary
Activity: 4256
Merit: 8551
'The right to privacy matters'
the 2980 or 2880 with the fan mod saves 40 watts

lot of photos on the fan mod.

https://bitcointalksearch.org/topic/m.13708402
hero member
Activity: 742
Merit: 500
We need a psu ~1500watt for last s7 batches.....
legendary
Activity: 4256
Merit: 8551
'The right to privacy matters'
February 29, 2016, 09:46:04 PM
#52
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
sr. member
Activity: 303
Merit: 250
February 29, 2016, 01:22:47 PM
#51

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.

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
sr. member
Activity: 506
Merit: 252
February 29, 2016, 12:08:39 PM
#50

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.

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.
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