2 Avalon 741 1,150W on Apw5 Antminer PSU 2,600W

[huynhdat1989]

I want to use APW5 PSU 2,600W to run 2xAvalon741 1,150W. I know the power is very near the limit, so is it dangerous?
Do you know another quality power that the price is reasonable? Using each Evga supernova 1,600W cost me 300$ is expensive.

[1715022781]

1715022781

[1715022781]

1715022781

[1715022781]

1715022781

[philipma1957]

I want to use APW5 PSU 2,600W to run 2xAvalon741 1,150W. I know the power is very near the limit, so is it dangerous?
Do you know another quality power that the price is reasonable? Using each Evga supernova 1,600W cost me 300$ is expensive.

so to use the apw5 psu  and get 2600 watts you need 240 volts.


Do you have 240 volts?




this does 1  avalon 741
https://bitcointalk.org/index.php?topic=1667131.0



this does 2

4kW Top View

[NotFuzzyWarm]

Or more to the point for the General Public, do you have 208 to 240VAC to feed it? The APW5 is derated to 1,500w when fed 110VAC.
If you do have the 208-240V then you will be fine.

[philipma1957]

yeah  he should be good with 240 volts.



this one below has a bit more power
https://bitcointalk.org/index.php?topic=966135.msg10561905#msg10561905



and this will go to 4000 volts.
https://bitcointalk.org/index.php?topic=1308296


finksy/j4bberwock



optimizier



are rivals


they sell break out boards  for  2k, 4k , 2880watt psus.


I have reviewed all their products.  Good gear.

for you  with 2 units.


I would buy 2 of these

http://www.ebay.com/itm/IBM-Bladecenter-Power-Supply-2320W-DPS-2500BB-A-39Y7405-39Y7400-200-240V-/332122989115?


and a 4k board from  either optimzier or finksy/j4bberwock


those psus work with either 4k board  and will give you  a max of 4600 watts.  you will max your efficiency running 2 avalon 741's  but can add a third with ease.

you need 2 fans to cool the units.  buy these two

https://www.amazon.com/Scythe-DFS123812H-3000-Ultra-Kaze-120mm/dp/B001JKNMBE/ref=sr_1_1?


this is a solid setup for 2 avalon 741's and allows for expansion to a third

[NotFuzzyWarm]

And also for the above boards, need the PCIe cables as well... 16 for 2 Avalons.

[philipma1957]

And also for the above boards, need the PCIe cables as well... 16 for 2 Avalons.

Yeah. They need the cables.  May as well order 25 cables .

Then when you add the third miner the cables are on hand.😀😀

[huynhdat1989]

yeah  he should be good with 240 volts.



this one below has a bit more power
https://bitcointalk.org/index.php?topic=966135.msg10561905#msg10561905



and this will go to 4000 volts.
https://bitcointalk.org/index.php?topic=1308296


finksy/j4bberwock



optimizier



are rivals


they sell break out boards  for  2k, 4k , 2880watt psus.


I have reviewed all their products.  Good gear.

for you  with 2 units.


I would buy 2 of these

http://www.ebay.com/itm/IBM-Bladecenter-Power-Supply-2320W-DPS-2500BB-A-39Y7405-39Y7400-200-240V-/332122989115?


and a 4k board from  either optimzier or finksy/j4bberwock


those psus work with either 4k board  and will give you  a max of 4600 watts.  you will max your efficiency running 2 avalon 741's  but can add a third with ease.

you need 2 fans to cool the units.  buy these two

https://www.amazon.com/Scythe-DFS123812H-3000-Ultra-Kaze-120mm/dp/B001JKNMBE/ref=sr_1_1?


this is a solid setup for 2 avalon 741's and allows for expansion to a third

Thanks Philipma1957

And also for the above boards, need the PCIe cables as well... 16 for 2 Avalons.

Yeah. They need the cables.  May as well order 25 cables .

Then when you add the third miner the cables are on hand.😀😀

Thanks philipma1957,
So those power supply is better than Bitmain? Is it smaller than Bitmain?
I saw on this page, some of miner got fired, and every miner cost me alot of money.

On the website of canaan.io require only 6 cables. Why do we have to buy 16 cables? Did I missed something about Avalon 741?
PSU output pins: 6 x 6PIN power connectors.

[NotFuzzyWarm]

The miners have 4 PCIe connectors per-board x 2 boards per-miner =  8 cables. Yes, Canaan says only 6 (3 per hash board) can be used but it is always Best Practice to use all power connectors provided. Partly because cables on many ATX PSU's have light gauge wire so the extra connectors/wires make up for that and partly just to keep connector temps from rising.

I use some of the IBM and HP server supplies and they are great. But, I just got tired of also having to get the not so common IEC-19 power cords, breakout boards and cables and finally started just using the Bitmain PSU's. Have 25 of them and to-date zero problems.

EDIT: Well I stand corrected... The Avalon 721's (which I have) has 8 PCIe sockets but was just on Canaan's site and the 741 despite drawing more power, has only 6 sockets. Not good choice in my book of design rules but thass what they use. 'Acceptable' for consumer gear, yes but not a good place to shave production cost.

[huynhdat1989]

The miners have 4 PCIe connectors per-board x 2 boards per-miner =  8 cables. Yes, Canaan says only 6 (3 per hash board) can be used but it is always Best Practice to use all power connectors provided. Partly because cables on many ATX PSU's have light gauge wire so the extra connectors/wires make up for that and partly just to keep connector temps from rising.

I use some of the IBM and HP server supplies and they are great. But, I just got tired of also having to get the not so common IEC-19 power cords, breakout boards and cables and finally started just using the Bitmain PSU's. Have 25 of them and to-date zero problems.

EDIT: Well I stand corrected... The Avalon 721's (which I have) has 8 PCIe sockets but was just on Canaan's site and the 741 despite drawing more power, has only 6 sockets. Not good choice in my book of design rules but thass what they use. 'Acceptable' for consumer gear, yes but not a good place to shave production cost.

Thank you very much, I will use Bitmain PSU or Evga for reliable.
May I have the book title and ISBN? I love reading.

[NotFuzzyWarm]

The miners have 4 PCIe connectors per-board x 2 boards per-miner =  8 cables. Yes, Canaan says only 6 (3 per hash board) can be used but it is always Best Practice to use all power connectors provided. Partly because cables on many ATX PSU's have light gauge wire so the extra connectors/wires make up for that and partly just to keep connector temps from rising.

I use some of the IBM and HP server supplies and they are great. But, I just got tired of also having to get the not so common IEC-19 power cords, breakout boards and cables and finally started just using the Bitmain PSU's. Have 25 of them and to-date zero problems.

EDIT: Well I stand corrected... The Avalon 721's (which I have) has 8 PCIe sockets but was just on Canaan's site and the 741 despite drawing more power, has only 6 sockets. Not good choice in my book of design rules but thass what they use. 'Acceptable' for consumer gear, yes but not a good place to shave production cost.

Thank you very much, I will use Bitmain PSU or Evga for reliable.
May I have the book title and ISBN? I love reading.

The Book title is: Over 50 years of working with power electronics electronics with the past 30+ as Sr. Engineer designing industrial laser systems...

As far as specifics on the PCIe connectors, their max rating first of all depends on the quality/condition of the pins used and that sets max current per-pin. Anywho, @12vdc it works out to 288w max - with best quality pins for both the socket/plug, eg gold or silver-flashed and not plugged/unplugged more than 10 times. Even then then connector will get warm(ish). Best Practice for long life is keep connectors around 50% of max rating when feasible. ref the section on PCIe at: https://www.moddiy.com/pages/Power-Supply-Connectors-%26-Pinouts.html

Um, that advice for max sustained load per connector definitely applies to your wall sockets and cords as well....

That would put us at 144w/connector = 432w per board using 3 connectors. The 721's with their 4x connectors per-board and less power draw - perfect design choice. The 741 with more power draw and 3 connectors.... Why? To save maybe $0.50 tops at the cost of the connectors aging faster??? Throw in many folks using non-optimum PSU's that may have only 18ga wires (higher voltage drop on top of iffy regulation) and their choice is is -- not the way I would go...

[charles2k]

The Book title is: Over 50 years of working with power electronics electronics with the past 30+ as Sr. Engineer designing industrial laser systems...

As far as specifics on the PCIe connectors, their max rating first of all depends on the quality/condition of the pins used and that sets max current per-pin. Anywho, @12vdc it works out to 288w max - with best quality pins for both the socket/plug, eg gold or silver-flashed and not plugged/unplugged more than 10 times. Even then then connector will get warm(ish). Best Practice for long life is keep connectors around 50% of max rating when feasible. ref the section on PCIe at: https://www.moddiy.com/pages/Power-Supply-Connectors-%26-Pinouts.html

Um, that advice for max sustained load per connector definitely applies to your wall sockets and cords as well....

That would put us at 144w/connector = 432w per board using 3 connectors. The 721's with their 4x connectors per-board and less power draw - perfect design choice. The 741 with more power draw and 3 connectors.... Why? To save maybe $0.50 tops at the cost of the connectors aging faster??? Throw in many folks using non-optimum PSU's that may have only 18ga wires (higher voltage drop on top of iffy regulation) and their choice is is -- not the way I would go...

KNC Neptune use one PCIE 6pin connector for one cube with consumption aprox. 400W... With good quality AWG16 cables I had minimum problems with that (but not overclocked to 500MHz). But of course with shit/AWG18 cables yes...

[NotFuzzyWarm]

The Book title is: Over 50 years of working with power electronics electronics with the past 30+ as Sr. Engineer designing industrial laser systems...

As far as specifics on the PCIe connectors, their max rating first of all depends on the quality/condition of the pins used and that sets max current per-pin. Anywho, @12vdc it works out to 288w max - with best quality pins for both the socket/plug, eg gold or silver-flashed and not plugged/unplugged more than 10 times. Even then then connector will get warm(ish). Best Practice for long life is keep connectors around 50% of max rating when feasible. ref the section on PCIe at: https://www.moddiy.com/pages/Power-Supply-Connectors-%26-Pinouts.html

Um, that advice for max sustained load per connector definitely applies to your wall sockets and cords as well....

That would put us at 144w/connector = 432w per board using 3 connectors. The 721's with their 4x connectors per-board and less power draw - perfect design choice. The 741 with more power draw and 3 connectors.... Why? To save maybe $0.50 tops at the cost of the connectors aging faster??? Throw in many folks using non-optimum PSU's that may have only 18ga wires (higher voltage drop on top of iffy regulation) and their choice is is -- not the way I would go...

KNC Neptune use one PCIE 6pin connector for one cube with consumption aprox. 400W... With good quality AWG16 cables I had minimum problems with that (but not overclocked to 500MHz). But of course with shit/AWG18 cables yes...

And are not the threads on the Neptunes and Titans filled with many pics of fried connectors? Molex says 8A max per circuit so with 3 pairs that is 24A total @ 12v nominal = 288W max for the connector. *Can* that work? Yes, for a while at least especially with 16ga wires to help carry away heat from the connector. However, it is certainly not a good idea for a designer to EVEN THINK of blatantly ignoring the mfgr specs....