Should i get APW3-12-1600 or other PSUs?

[MineRonny]

We are new to mining, but have been monitoring since Dec'15. We're prepared to purchase S7-LN as it came with power supply so it seems like a good purchase. However, S7-LN recently went out of stock.

We're looking to purchase S7s now and considering PSUs for our S7s. Should i get PSU from bitmain, or should i go with other PSUs like EVGA Supernova 1600?

[philipma1957]

We are new to mining, but have been monitoring since Dec'15. We're prepared to purchase S7-LN as it came with power supply so it seems like a good purchase. However, S7-LN recently went out of stock.

We're looking to purchase S7s now and considering PSUs for our S7s. Should i get PSU from bitmain, or should i go with other PSUs like EVGA Supernova 1600?

first question do you have  220/240 volt power?

you should not get bitmaintech  or evga 1600 if you have 220/240 volt power

read this thread  far better to use this system to power s-7's and or s-9's


https://bitcointalk.org/index.php?topic=1373092.0;all

https://bitcointalk.org/index.php?topic=1373092.msg15403344#msg15403344

[MineRonny]

We are new to mining, but have been monitoring since Dec'15. We're prepared to purchase S7-LN as it came with power supply so it seems like a good purchase. However, S7-LN recently went out of stock.

We're looking to purchase S7s now and considering PSUs for our S7s. Should i get PSU from bitmain, or should i go with other PSUs like EVGA Supernova 1600?

first question do you have  220/240 volt power?

you should not get bitmaintech  or evga 1600 if you have 220/240 volt power

read this thread  far better to use this system to power s-7's and or s-9's


https://bitcointalk.org/index.php?topic=1373092.0;all

https://bitcointalk.org/index.php?topic=1373092.msg15403344#msg15403344

Hi philip, thanks for the great information. We're indeed running on 240 volts. I'm not too sure of what is that thread about after i read it. From what i understand it is regarding breakout boards. Does that mean that we'll require breakout boards to run on 240 volts?

Thank you!

[sidehack]

It's advertising a server PSU and breakout board which is, overall, better than Bitmain's PSU. The conversion efficiency is a few percent lower but the total power, reliability, flexibility and price beat it.

If you're in the US and wanting to buy S7 from Bitmain, I can probably hook you up with undervolted units that run 85% hashrate at under 70% power versus stock units, with a power supply, for about the same price you can get just a new S7 shipped from Bitmain. This makes 'em more efficient than an S7-LN and can also be run on 120V.

[MineRonny]

It's advertising a server PSU and breakout board which is, overall, better than Bitmain's PSU. The conversion efficiency is a few percent lower but the total power, reliability, flexibility and price beat it.

If you're in the US and wanting to buy S7 from Bitmain, I can probably hook you up with undervolted units that run 85% hashrate at under 70% power versus stock units, with a power supply, for about the same price you can get just a new S7 shipped from Bitmain. This makes 'em more efficient than an S7-LN and can also be run on 120V.

I've read the post again.. Is the PSUs mentions DPS2000BB ?

Also, why would we need the breakout board in addition to the PSU?

I'm actually located in Southeast Asia, Thank you for the offer though 

[NotFuzzyWarm]

Most of the PSU's I use in my farm are Bitmains, have 26 of them and with the oldest ones being almost 2 years old so far zero problems.

I also have used the IBM DPS-2000 w/ breakout boards (needed because the PSU has no wires coming out of it), also very good and yes a bit cheaper than Bitmain's PSU's but it does a take a bit of time and effort to get everything together (PSU, breakout, PCIe cables) whereas Bitmains are totally plug-and-play.

[philipma1957]

It's advertising a server PSU and breakout board which is, overall, better than Bitmain's PSU. The conversion efficiency is a few percent lower but the total power, reliability, flexibility and price beat it.

If you're in the US and wanting to buy S7 from Bitmain, I can probably hook you up with undervolted units that run 85% hashrate at under 70% power versus stock units, with a power supply, for about the same price you can get just a new S7 shipped from Bitmain. This makes 'em more efficient than an S7-LN and can also be run on 120V.

I've read the post again.. Is the PSUs mentions DPS2000BB ?

Also, why would we need the breakout board in addition to the PSU?

I'm actually located in Southeast Asia, Thank you for the offer though  

Based on your location and parts availability you are best off with bitmaintech.

If you were USA based I would say go with the dps-2000 and set up that way.

But  your location means the bitmaintech psu is easier.

Sidehack's  modded s-7's and his power supply is also really good, but once again cross shipping  China to usa to asia is an issue.


Why do want s-7's do you have cheap power?

[IITravel01]

The S7-LN seem to come in and go out of stock on BitMain, they might be back.  Did you check the Hardward for sale here, I saw yesterday sidehack had a modded S7-LN for sale.

He's also got  a few modded S7's for sale.  Better than ordering directly from BitMain.  https://bitcointalk.org/index.php?topic=1556664.0

[MineRonny]

Most of the PSU's I use in my farm are Bitmains, have 26 of them and with the oldest ones being almost 2 years old so far zero problems.

I also have used the IBM DPS-2000 w/ breakout boards (needed because the PSU has no wires coming out of it), also very good and yes a bit cheaper than Bitmain's PSU's but it does a take a bit of time and effort to get everything together (PSU, breakout, PCIe cables) whereas Bitmains are totally plug-and-play.

I am actually not very good in electronics, so i guess i will be going with bitmaintechs PSU. Im afraid that i might mess up on breakout boards 

It's advertising a server PSU and breakout board which is, overall, better than Bitmain's PSU. The conversion efficiency is a few percent lower but the total power, reliability, flexibility and price beat it.

If you're in the US and wanting to buy S7 from Bitmain, I can probably hook you up with undervolted units that run 85% hashrate at under 70% power versus stock units, with a power supply, for about the same price you can get just a new S7 shipped from Bitmain. This makes 'em more efficient than an S7-LN and can also be run on 120V.

I've read the post again.. Is the PSUs mentions DPS2000BB ?

Also, why would we need the breakout board in addition to the PSU?

I'm actually located in Southeast Asia, Thank you for the offer though 

Based on your location and parts availability you are best off with bitmaintech.

If you were USA based I would say go with the dps-2000 and set up that way.

But  your location means the bitmaintech psu is easier.

Sidehack's  modded s-7's and his power supply is also really good, but once again cross shipping  China to usa to asia is an issue.


Why do want s-7's do you have cheap power?

Thanks philipma, i will go with your recommendation!

And Yes, we actually have very cheap power. The USD/TH for s7 makes more sense to us as compared to s9. We decided to go for S7-LN as it came with power supply, but it went out of stock. Rang bitmain up yesterday and they told me to wait till next week for news if S7-LN will be coming again.

I realized that the power supply for s7-ln is only 1000w, and cant power s7/s9 and thus i decided to go for s7 instead.

Another thing, i'd like to thank you and NotFuzzyWarm as i have learnt alot in the forums from you guys!

The S7-LN seem to come in and go out of stock on BitMain, they might be back.  Did you check the Hardward for sale here, I saw yesterday sidehack had a modded S7-LN for sale.

He's also got  a few modded S7's for sale.  Better than ordering directly from BitMain.  https://bitcointalk.org/index.php?topic=1556664.0

Bitmain told me over the phone to wait for news on S7-LN next week. They might come up with a new batch. But i have heard from some users that they are clearing the old power suppliers from S2, so they came up with S7-LN. we shall see next week if they will come up with a new batch

[sidehack]

I purchased a total of 15 S7LN from Bitmain and got three bad power supplies. I was able to fix one of them but 20% failure rate is not impressive. I could tell several of the working supplies had also been opened up and worked on before they ever got to me.

A good PSU breakout board is pretty much foolproof. A lot of them nowdays have the same power jacks as the miner will, so to mess up cabling is almost impossible. Just plug everything together (it'll only go one way), flip the switch and you're on.

[flameruk]

Hi.

I run in the UK at 230 volt.
I have never purchased a Bitmain PSU. I started using IBM Server Power Supplies a couple of years ago on my Spondoolises SP20's.
I carried these over to the S7's and the S9's.
Just two pins to solder together to get the PSU to run up and I use 1/4" Lucar Crimps to connect the wires onto the PSU.
I use two per miner, both rated at 1300W, they are DPS-1300 PSU's and have always been reliable for me.

[NotFuzzyWarm]

I purchased a total of 15 S7LN from Bitmain and got three bad power supplies. I was able to fix one of them but 20% failure rate is not impressive. I could tell several of the working supplies had also been opened up and worked on before they ever got to me.

A good PSU breakout board is pretty much foolproof. A lot of them nowdays have the same power jacks as the miner will, so to mess up cabling is almost impossible. Just plug everything together (it'll only go one way), flip the switch and you're on.

PCIe jacks on the breakouts may make things easy BUT I'll take your terminal strip and cables with spade lugs any day. Since the PCIe plugs/jacks are the weak point in the power chain, losing one set is great.

One thing that needs mentioning is that these connectors have a mating-cycle rating and most of the time it is surprisingly a low number: often just several 10's up to maybe few hundred at best.... Each time they are plugged/unplugged the connector gripping tension becomes weaker and plating is scraped off of the pins eventually leading to increasing contact resistance/heating/failure.

[MineRonny]

I purchased a total of 15 S7LN from Bitmain and got three bad power supplies. I was able to fix one of them but 20% failure rate is not impressive. I could tell several of the working supplies had also been opened up and worked on before they ever got to me.

A good PSU breakout board is pretty much foolproof. A lot of them nowdays have the same power jacks as the miner will, so to mess up cabling is almost impossible. Just plug everything together (it'll only go one way), flip the switch and you're on.

Thanks for the update. I guess i'm glad that i didnt go with S7 - LN.

Hi.

I run in the UK at 230 volt.
I have never purchased a Bitmain PSU. I started using IBM Server Power Supplies a couple of years ago on my Spondoolises SP20's.
I carried these over to the S7's and the S9's.
Just two pins to solder together to get the PSU to run up and I use 1/4" Lucar Crimps to connect the wires onto the PSU.
I use two per miner, both rated at 1300W, they are DPS-1300 PSU's and have always been reliable for me.

https://ip.bitcointalk.org/?u=https%3A%2F%2Fi.imgur.com%2F3YfHs4w.jpg&t=566&c=Ck25dXn1-L2bWA

I think that it is not economic if we were to use 2 PSU to 1 miner, unless you already have the PSU. is that right? For eg : 2 power supply rated 1000w = $200 each. 1 power supply rated 2000w = $300 each.

I purchased a total of 15 S7LN from Bitmain and got three bad power supplies. I was able to fix one of them but 20% failure rate is not impressive. I could tell several of the working supplies had also been opened up and worked on before they ever got to me.

A good PSU breakout board is pretty much foolproof. A lot of them nowdays have the same power jacks as the miner will, so to mess up cabling is almost impossible. Just plug everything together (it'll only go one way), flip the switch and you're on.

PCIe jacks on the breakouts may make things easy BUT I'll take your terminal strip and cables with spade lugs any day. Since the PCIe plugs/jacks are the weak point in the power chain, losing one set is great.

One thing that needs mentioning is that these connectors have a mating-cycle rating and most of the time it is surprisingly a low number: often just several 10's up to maybe few hundred at best.... Each time they are plugged/unplugged the connector gripping tension becomes weaker and plating is scraped off of the pins eventually leading to increasing contact resistance/heating/failure.

That sounds complicated. Can i ask what is the difference between PSU + breakout board and PSU from bitmain?

What is a mating-cycle rating? Did a search on google for those terms and understood a little, but didnt get the last paragraph.

[flameruk]

I purchased a total of 15 S7LN from Bitmain and got three bad power supplies. I was able to fix one of them but 20% failure rate is not impressive. I could tell several of the working supplies had also been opened up and worked on before they ever got to me.

A good PSU breakout board is pretty much foolproof. A lot of them nowdays have the same power jacks as the miner will, so to mess up cabling is almost impossible. Just plug everything together (it'll only go one way), flip the switch and you're on.

Thanks for the update. I guess i'm glad that i didnt go with S7 - LN.

Hi.

I run in the UK at 230 volt.
I have never purchased a Bitmain PSU. I started using IBM Server Power Supplies a couple of years ago on my Spondoolises SP20's.
I carried these over to the S7's and the S9's.
Just two pins to solder together to get the PSU to run up and I use 1/4" Lucar Crimps to connect the wires onto the PSU.
I use two per miner, both rated at 1300W, they are DPS-1300 PSU's and have always been reliable for me.

I think that it is not economic if we were to use 2 PSU to 1 miner, unless you already have the PSU. is that right? For eg : 2 power supply rated 1000w = $200 each. 1 power supply rated 2000w = $300 each.

I purchased a total of 15 S7LN from Bitmain and got three bad power supplies. I was able to fix one of them but 20% failure rate is not impressive. I could tell several of the working supplies had also been opened up and worked on before they ever got to me.

A good PSU breakout board is pretty much foolproof. A lot of them nowdays have the same power jacks as the miner will, so to mess up cabling is almost impossible. Just plug everything together (it'll only go one way), flip the switch and you're on.

PCIe jacks on the breakouts may make things easy BUT I'll take your terminal strip and cables with spade lugs any day. Since the PCIe plugs/jacks are the weak point in the power chain, losing one set is great.

One thing that needs mentioning is that these connectors have a mating-cycle rating and most of the time it is surprisingly a low number: often just several 10's up to maybe few hundred at best.... Each time they are plugged/unplugged the connector gripping tension becomes weaker and plating is scraped off of the pins eventually leading to increasing contact resistance/heating/failure.

That sounds complicated. Can i ask what is the difference between PSU + breakout board and PSU from bitmain?

What is a mating-cycle rating? Did a search on google for those terms and understood a little, but didnt get the last paragraph.

Hi MineRonnie.

I buy ALL the power supplies from eBay, generally from computer recyclers.
I have never paid more than £15 for a Power Supply, normally around £12 to £14 each.
That makes a pair of power supplies max £30.00.

The IBM 1300W power supplies are very reliable and although I have one which is a little noisy on start up, they just run really reliable.
Just eBay search for IBM 1300W and you should recognise them.
If you look at my photo with the power strip at the bottom, solder bottom LH and the pin directly above it.
Power supply just runs straight up on power up.

Have fun!

[MarkAz]

I'll toss in my 2c - I never skimp on buying PSU's.  Of all the things you'll be buying when you're mining, PSU's are probably the only thing that will last your mining lifetime, and be the same value when you sell it as when you bought it (assuming we're talking server PSU's with breakouts).  There are several great breakouts - the ones I've used and really like are Optimizer's and Sidehacks (Gekkoscience), they're both on the top end in terms of quality and workmanship.  Oh, and don't skimp on power cables either - 16 AWG all the way and you'll never have any problems.

[NotFuzzyWarm]

What is a mating-cycle rating? Did a search on google for those terms and understood a little, but didnt get the last paragraph.

It is how many times a connector can be plugged and unplugged. Google gave this as top search, http://www.cirris.com/learning-center/product-articles/other-products/227-connector-life-cycles and it pretty much describes it in detail.

As for the effects of wear, as the metal plating wears off and/or the contacts begin to loosen contact resistance goes up. That leads to the connector pins heating up which starts to increases oxidation, which in turn increases resistance, etc. It's a vicious cycle.

[delicin33]

It's advertising a server PSU and breakout board which is, overall, better than Bitmain's PSU. The conversion efficiency is a few percent lower but the total power, reliability, flexibility and price beat it.

If you're in the US and wanting to buy S7 from Bitmain, I can probably hook you up with undervolted units that run 85% hashrate at under 70% power versus stock units, with a power supply, for about the same price you can get just a new S7 shipped from Bitmain. This makes 'em more efficient than an S7-LN and can also be run on 120V.

I've read the post again.. Is the PSUs mentions DPS2000BB ?

Also, why would we need the breakout board in addition to the PSU?

I'm actually located in Southeast Asia, Thank you for the offer though 

240V Ac in SEA   malaysia? singapore? or brunai?

few months ago i tried to search for those used server DELL/IBM psu but the price +shipping is way too expensive  

you better order Bitman PSU directly from https://shop.bitmain.com/productDetail.htm?pid=000201505040743496917U7kGsCm0694

usd140 + shipping usd30 total usd170 with 12 month warranty.

[MineRonny]

I purchased a total of 15 S7LN from Bitmain and got three bad power supplies. I was able to fix one of them but 20% failure rate is not impressive. I could tell several of the working supplies had also been opened up and worked on before they ever got to me.

A good PSU breakout board is pretty much foolproof. A lot of them nowdays have the same power jacks as the miner will, so to mess up cabling is almost impossible. Just plug everything together (it'll only go one way), flip the switch and you're on.

Thanks for the update. I guess i'm glad that i didnt go with S7 - LN.

Hi.

I run in the UK at 230 volt.
I have never purchased a Bitmain PSU. I started using IBM Server Power Supplies a couple of years ago on my Spondoolises SP20's.
I carried these over to the S7's and the S9's.
Just two pins to solder together to get the PSU to run up and I use 1/4" Lucar Crimps to connect the wires onto the PSU.
I use two per miner, both rated at 1300W, they are DPS-1300 PSU's and have always been reliable for me.

https://ip.bitcointalk.org/?u=https%3A%2F%2Fi.imgur.com%2F3YfHs4w.jpg&t=566&c=Ck25dXn1-L2bWA

I think that it is not economic if we were to use 2 PSU to 1 miner, unless you already have the PSU. is that right? For eg : 2 power supply rated 1000w = $200 each. 1 power supply rated 2000w = $300 each.

I purchased a total of 15 S7LN from Bitmain and got three bad power supplies. I was able to fix one of them but 20% failure rate is not impressive. I could tell several of the working supplies had also been opened up and worked on before they ever got to me.

A good PSU breakout board is pretty much foolproof. A lot of them nowdays have the same power jacks as the miner will, so to mess up cabling is almost impossible. Just plug everything together (it'll only go one way), flip the switch and you're on.

PCIe jacks on the breakouts may make things easy BUT I'll take your terminal strip and cables with spade lugs any day. Since the PCIe plugs/jacks are the weak point in the power chain, losing one set is great.

One thing that needs mentioning is that these connectors have a mating-cycle rating and most of the time it is surprisingly a low number: often just several 10's up to maybe few hundred at best.... Each time they are plugged/unplugged the connector gripping tension becomes weaker and plating is scraped off of the pins eventually leading to increasing contact resistance/heating/failure.

That sounds complicated. Can i ask what is the difference between PSU + breakout board and PSU from bitmain?

What is a mating-cycle rating? Did a search on google for those terms and understood a little, but didnt get the last paragraph.

Hi MineRonnie.

I buy ALL the power supplies from eBay, generally from computer recyclers.
I have never paid more than £15 for a Power Supply, normally around £12 to £14 each.
That makes a pair of power supplies max £30.00.

The IBM 1300W power supplies are very reliable and although I have one which is a little noisy on start up, they just run really reliable.
Just eBay search for IBM 1300W and you should recognise them.
If you look at my photo with the power strip at the bottom, solder bottom LH and the pin directly above it.
Power supply just runs straight up on power up.

Have fun!

Thanks flameruk, that's a very good suggestion BTW, to buy used PSUs at such price is worth considering. However, after some searching on eBay, it costs around 120USD for 2 PSUs + Shipping. With that, i think i'd go for bitmain's PSU as they come with 1 year warranty too. What do you think?

I'll toss in my 2c - I never skimp on buying PSU's.  Of all the things you'll be buying when you're mining, PSU's are probably the only thing that will last your mining lifetime, and be the same value when you sell it as when you bought it (assuming we're talking server PSU's with breakouts).  There are several great breakouts - the ones I've used and really like are Optimizer's and Sidehacks (Gekkoscience), they're both on the top end in terms of quality and workmanship.  Oh, and don't skimp on power cables either - 16 AWG all the way and you'll never have any problems.

That is what im considering too. Miners come and go, but PSUs will be used again and again.

What is a mating-cycle rating? Did a search on google for those terms and understood a little, but didnt get the last paragraph.

It is how many times a connector can be plugged and unplugged. Google gave this as top search, http://www.cirris.com/learning-center/product-articles/other-products/227-connector-life-cycles and it pretty much describes it in detail.

As for the effects of wear, as the metal plating wears off and/or the contacts begin to loosen contact resistance goes up. That leads to the connector pins heating up which starts to increases oxidation, which in turn increases resistance, etc. It's a vicious cycle.

Oh, i apologize for not finding that and thanks for the explaination.

It's advertising a server PSU and breakout board which is, overall, better than Bitmain's PSU. The conversion efficiency is a few percent lower but the total power, reliability, flexibility and price beat it.

If you're in the US and wanting to buy S7 from Bitmain, I can probably hook you up with undervolted units that run 85% hashrate at under 70% power versus stock units, with a power supply, for about the same price you can get just a new S7 shipped from Bitmain. This makes 'em more efficient than an S7-LN and can also be run on 120V.

I've read the post again.. Is the PSUs mentions DPS2000BB ?

Also, why would we need the breakout board in addition to the PSU?

I'm actually located in Southeast Asia, Thank you for the offer though 

240V Ac in SEA   malaysia? singapore? or brunai?

few months ago i tried to search for those used server DELL/IBM psu but the price +shipping is way too expensive  

you better order Bitman PSU directly from https://shop.bitmain.com/productDetail.htm?pid=000201505040743496917U7kGsCm0694

usd140 + shipping usd30 total usd170 with 12 month warranty.

Location shall be kept a secret until one day we're ready to open up to hosting 

i agree with your calculations too. But im afraid that bitmain's PSU would breakdown easily, and from what i gather from forums, their warranty takes a loooong looooong time.

[udaredme]

https://www.bitmaintech.com/productDetail.htm?pid=00020160725071342525Njtyqt6h071C

[MineRonny]

https://www.bitmaintech.com/productDetail.htm?pid=00020160725071342525Njtyqt6h071C

I see. They came up with a second batch. However, the PSUs only have 90day warranty. What are your thoughts about that?