Update Large review of Finksy/J4bbrwock server psus compared to ATXpsu-photos up

[thesmokingman]

So I ordered a pair of DPS-2000BB from a server supply company and I finally got them yesterday.  They sent me two Rev. 3 which I think to myself great under Rev. 9 so it should be good for the volt mod and all that fun stuff.  Unfortunately when I plug the breakout board to the pair of PSU and connect the power cable I get absolutely nothing.  I take the exact same setup, same power cord, same outlet and same breakout board and plug it into a pair of Rev S8M and it works perfectly.  Has anybody else had any experiences with Rev 3?  I could understand if one of the power supplies was dead, but neither of these power supplies powered on at all.

I believe I never got an older revision than s5 or s6. To try them individually, you can plug the bottom one to the dual breakout hoard. This way, even voltage adjust works with a single PSU.
The pinout for the PSU have to be the same on all revisions, or you'll have trouble on the servers. If the breakout board works with one revision, it'll work on all unless the very old revisions are using another pin combined with the one I use to turn on the PSU.
Or you may have 1 or 2 dead PSUs.

I purchased 32 of these PSUs from a dealer on eBay and they are all REV1-REV4 and they all work fine for me using the dual BB. The only issue I saw was at the highest setting, I was only getting 12.30~.40v. This was resolved by tweaking the internal VR501 pot an 1/8th of a turn to the left. Other than that, I haven't had any issues with my older REV PSUs. Mine all end with an "A" though as J4bberwock has mentioned, so that could also be an issue.

Near where you plug in the power cord, you should see two glass domes there with AC written under one and DC written under the other. Do you see either one (I think AC should light up first) light up when you connect the power cable? If not I would say you have bad PSUs. Out of the 32 I tested, the one bad PSU I did have would power up (green light for AC & DC), but would shut down when placed under load. Both the green light for AC and DC would go out, and the volts would drop down dramatically on the LCD display.

@J4bberwock - Could I have adjusted the external pot on your dual BB to correct the issue of the PSUs only putting out 12.30v? I only ask as I adjusted the small pot on the bottom left of the breakout board, but didn't notice a change in volts on the LCD screen or my multi-meter (I was turning the external pot to the left). As mentioned above, I manually adjusted the pot on the inside as I was afraid to keep turning the external one of the BB.

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[generalt]

I purchased 32 of these PSUs from a dealer on eBay and they are all REV1-REV4 and they all work fine for me using the dual BB. The only issue I saw was at the highest setting, I was only getting 12.30~.40v. This was resolved by tweaking the internal VR501 pot an 1/8th of a turn to the left. Other than that, I haven't had any issues with my older REV PSUs. Mine all end with an "A" though as J4bberwock has mentioned, so that could also be an issue.

Near where you plug in the power cord, you should see two glass domes there with AC written under one and DC written under the other. Do you see either one (I think AC should light up first) light up when you connect the power cable? If not I would say you have bad PSUs. Out of the 32 I tested, the one bad PSU I did have would power up (green light for AC & DC), but would shut down when placed under load. Both the green light for AC and DC would go out, and the volts would drop down dramatically on the LCD display.

@J4bberwock - Could I have adjusted the external pot on your dual BB to correct the issue of the PSUs only putting out 12.30v? I only ask as I adjusted the small pot on the bottom left of the breakout board, but didn't notice a change in volts on the LCD screen or my multi-meter (I was turning the external pot to the left). As mentioned above, I manually adjusted the pot on the inside as I was afraid to keep turning the external one of the BB.

I tried plugging them in one at a time to the board and neither of them would power up.  I never get any green lights on the back of the unit where you connect the power cord.  I got an RMA and these babies are getting sent back.  Thank you everybody for your help.

[J4bberwock]

So I ordered a pair of DPS-2000BB from a server supply company and I finally got them yesterday.  They sent me two Rev. 3 which I think to myself great under Rev. 9 so it should be good for the volt mod and all that fun stuff.  Unfortunately when I plug the breakout board to the pair of PSU and connect the power cable I get absolutely nothing.  I take the exact same setup, same power cord, same outlet and same breakout board and plug it into a pair of Rev S8M and it works perfectly.  Has anybody else had any experiences with Rev 3?  I could understand if one of the power supplies was dead, but neither of these power supplies powered on at all.

I believe I never got an older revision than s5 or s6. To try them individually, you can plug the bottom one to the dual breakout hoard. This way, even voltage adjust works with a single PSU.
The pinout for the PSU have to be the same on all revisions, or you'll have trouble on the servers. If the breakout board works with one revision, it'll work on all unless the very old revisions are using another pin combined with the one I use to turn on the PSU.
Or you may have 1 or 2 dead PSUs.

I purchased 32 of these PSUs from a dealer on eBay and they are all REV1-REV4 and they all work fine for me using the dual BB. The only issue I saw was at the highest setting, I was only getting 12.30~.40v. This was resolved by tweaking the internal VR501 pot an 1/8th of a turn to the left. Other than that, I haven't had any issues with my older REV PSUs. Mine all end with an "A" though as J4bberwock has mentioned, so that could also be an issue.

Near where you plug in the power cord, you should see two glass domes there with AC written under one and DC written under the other. Do you see either one (I think AC should light up first) light up when you connect the power cable? If not I would say you have bad PSUs. Out of the 32 I tested, the one bad PSU I did have would power up (green light for AC & DC), but would shut down when placed under load. Both the green light for AC and DC would go out, and the volts would drop down dramatically on the LCD display.

@J4bberwock - Could I have adjusted the external pot on your dual BB to correct the issue of the PSUs only putting out 12.30v? I only ask as I adjusted the small pot on the bottom left of the breakout board, but didn't notice a change in volts on the LCD screen or my multi-meter (I was turning the external pot to the left). As mentioned above, I manually adjusted the pot on the inside as I was afraid to keep turning the external one of the BB.

The external pot on the breakout board will only have effect if the PSU is from a revision that can be adjusted
I personally tested revisions from 6 to 10, and 6 to 8 are working. Can't remember if the S9 worked too.
Clockwise will give more offset from the stock value of 12.2v
Counterclockwise will reduce offset to a point you should reach close to stock value.
Setting the external pot in middle position without touching the internal ones should give you 11.8v undervolt and 12.8v overvolt

[generalt]

The external pot on the breakout board will only have effect if the PSU is from a revision that can be adjusted
I personally tested revisions from 6 to 10, and 6 to 8 are working. Can't remember if the S9 worked too.
Clockwise will give more offset from the stock value of 12.2v
Counterclockwise will reduce offset to a point you should reach close to stock value.
Setting the external pot in middle position without touching the internal ones should give you 11.8v undervolt and 12.8v overvolt

I don't think S9 works.  At least not according to this post http://www.rcgroups.com/forums/showpost.php?p=19881042&postcount=997 you need to reconnect the pins for the voltage mod.

[nhando]

I have some spare IBM 2KW PSU that I'm not using as well as PCI-E cables.  If you're interested, please PM me for a good price.

[generalt]

I have some spare IBM 2KW PSU that I'm not using as well as PCI-E cables.  If you're interested, please PM me for a good price.

Thanks I managed find a pair finally, but with this crazy expected difficulty increase I may not be able to put much use to them for very long.

[nhando]

Hehe, don't forget, there will always be the next generation of miners hardware.  PSU will always be needed and you won't needing to upgrade them often.

[generalt]

With these difficulty jumps they would have to be some pretty impressive miners and they would have to be very reasonably priced but it's all a vicious cycle.  If they are worthy of buying then so many people would buy them that eventually it will get to the point that the difficulty jumps up to the point that they are no longer profitable.  In the end everything just basically ends up in the same boat.  I hope I'm wrong but that's the way I see things now.

[philipma1957]

What we are seeing is not about good miners.

I think bitmaintech has planned this since last fall.

Around Nov we started to see huge swings in hash rate.

I think looking back at it bitmaintech was setting up multiple farms with s-7s

They tested them and knew they all worked.

We would see hash jump super high for a day or two then drop.

Once January came they fired up the three or four farms they built I think they have a six month one cent power contract.

The goal is grow hash at 10 to 20 percent. From now until the 1/2 ing or to when bitfury starts selling its .1 watt gear.


Simple math shows 1 cent power and .3 watt gear beats 4 cent power and .1 watt gear.

So go forward to April 1 and the diff is 240 or 300 buying the bitfury will not look to good.

This will put bitfury in the spot of trying to sell none profitable gear.

Or bitfury investors may attempt a btc price pump to 700 or so.

As I type bitmaintech is holding more the 24000 coins in one account.

So if bitfury does a price pump bitmaintech will score with those coins.

I have studied the bitmaintech addy and they changed the withdrawals right when
The hash rate took off.
Seems to me we are watching some very big power moves.


Now back to this thread.
I got a shipment from finksy on Thursday .  So I now can do one 2880 and three 2980 units

I have four Avalon6s and one coming on Monday.

I did a fan mod on the second 2980 I own and I am running two 2980's
Rather then one set of dual 2000 = 4000 psu and one 2980
The 2980 is clearly the best method in terms of power efficiency .

I now do 15 amps or 3600 watts that allow me 12.7th and it is pretty quiet setup.

[generalt]

Any way you look at it it just doesn't look good for home miners or bitcoin in general.

Also back to the thread, I finally got my 4k board and PSU set up.  I'm running two S7s and one under clocked SP20 at about 700w off them and I noticed that with the scythe fans on the 2 4k PSUs the PSU still feels hot to the touch.  They haven't thermally shut down on their own, but I'm just wondering if the scythes are enough and I'm just being a worry wart or not.  I love the 4k over the 2880w but I'm sure I'll love them both once I do a fan mod to the pair of 2880 if I ever get off my ass.

[MarkAz]

Any way you look at it it just doesn't look good for home miners or bitcoin in general.

Also back to the thread, I finally got my 4k board and PSU set up.  I'm running two S7s and one under clocked SP20 at about 700w off them and I noticed that with the scythe fans on the 2 4k PSUs the PSU still feels hot to the touch.  They haven't thermally shut down on their own, but I'm just wondering if the scythes are enough and I'm just being a worry wart or not.  I love the 4k over the 2880w but I'm sure I'll love them both once I do a fan mod to the pair of 2880 if I ever get off my ass.

I'll toss in my 2c, I loved the Scythe's with the S5 - it was my goto fan - but with the S7's and the PSU's, I'm only user higher RPM/SP server-grade fans (like Delta's or Sanyo Denki).  These are the best bang for the buck that I've found lately:

http://amzn.to/1ocmdeX

It's almost 2x the CFM of the Kaze and quite a bit more SP - two of these keep the 4k setup nice and cool, and I use a single one of these on my 2880W PSU's with no problems.  The only downside is that these are definitely louder than the Kaze, and they're also PWM - so you need to mod them slightly as the plug doesn't fit on the 4k boards.  On the 2880W, I pair it with a PWM thermal controller, so it still varies the speed of the fan based on the temp of the PSU - although I think you could probably accomplish much the same thing by making an adapter for the existing fan plugs.

So if you're a bit concerned, give two of these a shot and I think you'll be impressed, especially for the price...

[kilo17]

Any way you look at it it just doesn't look good for home miners or bitcoin in general.

Also back to the thread, I finally got my 4k board and PSU set up.  I'm running two S7s and one under clocked SP20 at about 700w off them and I noticed that with the scythe fans on the 2 4k PSUs the PSU still feels hot to the touch.  They haven't thermally shut down on their own, but I'm just wondering if the scythes are enough and I'm just being a worry wart or not.  I love the 4k over the 2880w but I'm sure I'll love them both once I do a fan mod to the pair of 2880 if I ever get off my ass.

I'll toss in my 2c, I loved the Scythe's with the S5 - it was my goto fan - but with the S7's and the PSU's, I'm only user higher RPM/SP server-grade fans (like Delta's or Sanyo Denki).  These are the best bang for the buck that I've found lately:

http://amzn.to/1ocmdeX

It's almost 2x the CFM of the Kaze and quite a bit more SP - two of these keep the 4k setup nice and cool, and I use a single one of these on my 2880W PSU's with no problems.  The only downside is that these are definitely louder than the Kaze, and they're also PWM - so you need to mod them slightly as the plug doesn't fit on the 4k boards.  On the 2880W, I pair it with a PWM thermal controller, so it still varies the speed of the fan based on the temp of the PSU - although I think you could probably accomplish much the same thing by making an adapter for the existing fan plugs.

So if you're a bit concerned, give two of these a shot and I think you'll be impressed, especially for the price...

Those are great fans but I prefer these because they are a bit quieter and have a nice high CFM (better than the Scythe) but not as much as the ones you posted.

http://www.amazon.com/gp/product/B00XDXHTFA?psc=1&redirect=true&ref_=oh_aui_detailpage_o06_s00

[kilo17]

And if you want a SMOKIN deal on some on the fans that MarkAZ showed try this link for them at $5 each - courtesy of Philipma

http://www.amazon.com/gp/product/B00YOC80IO?psc=1&redirect=true&ref_=oh_aui_detailpage_o00_s00

[MarkAz]

And if you want a SMOKIN deal on some on the fans that MarkAZ showed try this link for them at $5 each - courtesy of Philipma

http://www.amazon.com/gp/product/B00YOC80IO?psc=1&redirect=true&ref_=oh_aui_detailpage_o00_s00

I've actually bought two boxes like that, if you want a bunch, that's definitely the way to go.  Also if you stalk eBay, they show up on there every once in a while for usually around $75 for a box...

[nhando]

Any way you look at it it just doesn't look good for home miners or bitcoin in general.

Also back to the thread, I finally got my 4k board and PSU set up.  I'm running two S7s and one under clocked SP20 at about 700w off them and I noticed that with the scythe fans on the 2 4k PSUs the PSU still feels hot to the touch.  They haven't thermally shut down on their own, but I'm just wondering if the scythes are enough and I'm just being a worry wart or not.  I love the 4k over the 2880w but I'm sure I'll love them both once I do a fan mod to the pair of 2880 if I ever get off my ass.

I've standardized on this 4K bundle platform and have a ton of these PSU.  I even tested the Thermal shutdown feature by disabling the fans.  They work.  They also automatically shutdown when the load is higher than what they can produce (ie massive overclocking with 3 x S7 (over 800M) or 1 power supply cable being loose).  The 4K bundle can do 3 x S7 at 731M which draws more than 4KW no issues so there's plenty of wiggle room as well but they will run much hotter that way.  I find the best way to control heat with them is by having the fan at the bottom and pushing the hot air up.  The Ultra KAZE Scythes are the only fans I used, no issues.  I wouldn't worry about them as I've tested up to 90 degree ambients and at 731M for over 3 weeks in the home lab before deploying in large quantities at the partner site.

[nhando]

Any way you look at it it just doesn't look good for home miners or bitcoin in general.

Also back to the thread, I finally got my 4k board and PSU set up.  I'm running two S7s and one under clocked SP20 at about 700w off them and I noticed that with the scythe fans on the 2 4k PSUs the PSU still feels hot to the touch.  They haven't thermally shut down on their own, but I'm just wondering if the scythes are enough and I'm just being a worry wart or not.  I love the 4k over the 2880w but I'm sure I'll love them both once I do a fan mod to the pair of 2880 if I ever get off my ass.

I'll toss in my 2c, I loved the Scythe's with the S5 - it was my goto fan - but with the S7's and the PSU's, I'm only user higher RPM/SP server-grade fans (like Delta's or Sanyo Denki).  These are the best bang for the buck that I've found lately:

http://amzn.to/1ocmdeX

It's almost 2x the CFM of the Kaze and quite a bit more SP - two of these keep the 4k setup nice and cool, and I use a single one of these on my 2880W PSU's with no problems.  The only downside is that these are definitely louder than the Kaze, and they're also PWM - so you need to mod them slightly as the plug doesn't fit on the 4k boards.  On the 2880W, I pair it with a PWM thermal controller, so it still varies the speed of the fan based on the temp of the PSU - although I think you could probably accomplish much the same thing by making an adapter for the existing fan plugs.

So if you're a bit concerned, give two of these a shot and I think you'll be impressed, especially for the price...

These fans are definitely good and cheaper.  I only come to know about them recently when I was looking at mainly CFM and was replacing 1 of the S7 fan.  I asked on the S7 forum but no one responded and I figure , it's cheap enough so I order some.  They're good but it will throw the RPM off a bit when you view the S7 manual fan setting but does not impact performance.  The only difference and why I went with the Ultra Kaze is that they're 3 pin vs these being 4 pin.  So you will need adapters which shouldn't be an issue but I'm just lazy.

[philipma1957]

And if you want a SMOKIN deal on some on the fans that MarkAZ showed try this link for them at $5 each - courtesy of Philipma

http://www.amazon.com/gp/product/B00YOC80IO?psc=1&redirect=true&ref_=oh_aui_detailpage_o00_s00

As the third group buy died.

  I have that case sitting doing nothing.

I can sell  2 or more  fans cheaply.

 I figure I only need 4 or 5 of them for  myself.

here are my 4 avalon 6's





Final fan mods on the pair of 2980's I use 15 amps at 240 volts or 3600 watts to get over 12,450 gh this is .2891 watts a gh




two fans per 2980




back of the 2980's this mod on the 2980's also works on the 2880's saves 40 watts per psu or 1 kwatt a day
cost is 22 bucks per psu.  note the grills are needed my 22 price included grills    



the  two 2980's are now quieter then the  1 2980 with the 1 dual 2000/4000 !

In my den the 2x 2980's


in my den the 1 x 2980 and the 1 dual 2000 =4000


at the door to the garage



2x 2980's = quieter



mixed psu's = louder




2x 2980's much quieter

the mixed is a lot louder

[generalt]

These fans are definitely good and cheaper.  I only come to know about them recently when I was looking at mainly CFM and was replacing 1 of the S7 fan.  I asked on the S7 forum but no one responded and I figure , it's cheap enough so I order some.  They're good but it will throw the RPM off a bit when you view the S7 manual fan setting but does not impact performance.  The only difference and why I went with the Ultra Kaze is that they're 3 pin vs these being 4 pin.  So you will need adapters which shouldn't be an issue but I'm just lazy.

I'm lazy too and I like to try to keep things clean.  Definitely not as clean as MarkAz keeps his gear but I like to use the built in 3 pin connectors for the fan on the 4k board.  I'm going to let it run for a bit with the scythe fans and if they still stay too hot I may take a pair of those fans off you Phil.  I was worried with 224 cfm that it would be loud, but looking at your sound meter pics they should be ok I think.

[philipma1957]

These fans are definitely good and cheaper.  I only come to know about them recently when I was looking at mainly CFM and was replacing 1 of the S7 fan.  I asked on the S7 forum but no one responded and I figure , it's cheap enough so I order some.  They're good but it will throw the RPM off a bit when you view the S7 manual fan setting but does not impact performance.  The only difference and why I went with the Ultra Kaze is that they're 3 pin vs these being 4 pin.  So you will need adapters which shouldn't be an issue but I'm just lazy.

I'm lazy too and I like to try to keep things clean.  Definitely not as clean as MarkAz keeps his gear but I like to use the built in 3 pin connectors for the fan on the 4k board.  I'm going to let it run for a bit with the scythe fans and if they still stay too hot I may take a pair of those fans off you Phil.  I was worried with 224 cfm that it would be loud, but looking at your sound meter pics they should be ok I think.

I would send them with a speed control

When they run at 3900 rpm or less they are pretty quiet

[generalt]

I would send them with a speed control

When they run at 3900 rpm or less they are pretty quiet

That would be awesome.  Thanks!