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

[philipma1957]

I no longer recommend the 2880 breakout board for use with Avalon 6

the avalon 6's where running 2 per psus which is about 2100 watts dc/2300 watts ac

not over volted

I had some warmer weather last week and the board jacks over heated.

https://bitcointalk.org/index.php?topic=1403986.0



see jacks in these photos
























Not ready to do this but I will post a few teaser photos in a few minutes.

You Must have 240 volts for this gear!!
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A lot of photos so far

with info .  Much more on Mon -Weds


size matters the 2x 2000 watt or 4000 watts vs a 1200 watt seasonic plat





you can see 3.3 times the power  in close to the same size.




the 9.6 volt to 13 volt meanwell psu 1500 watts

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[1715561519]

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[rockyforever]

awesome!

[jstefanop]

In the last photo are those custom power busses you have the ATX wires connected too?? Pretty badass.You have a photo without the rubber shroud?

[Finksy]

Tracking shows package to be delivered today.  Looking forward to the review Phil!

And just to be clear, J4bberwock is the developer, and by far the brains of the operation.  I'm just the grunt doing assembly on this side of the pond 

[philipma1957]

In the last photo are those custom power busses you have the ATX wires connected too?? Pretty badass.You have a photo without the rubber shroud?

that is for the meanwell.  the meanwell is the most powerful/efficient/pot adjusted volts 9.6 to 13  but  it is only 87% .

 It has shown me why you need 240 volt hot psu's by hot more then 12 volts.  The avalon 6 and the s-7 like more volts 12.2 to 12.6

The meanwell is not efficient enough to be worth the money.  it is 350 new and 60 in mods = 400.  I got my meanwell on ebay for 125

But it simply is not the right psu for an s-7 or an avalon 6.  Except for testing volts from 9.6 to 13 then it is great.


 Once I get the pcie wires from finksy I can show more about hook ups  on the 2x 2000= 4000watts and on the 2880watt server.


https://www.trcelectronics.com/ecomm/pdf/rsp1500.pdf


I think I have some photos.

https://i.imgur.com/QSlSx0A.jpg

https://i.imgur.com/kQQcoKy.jpg

http://www.amazon.com/gp/product/B007ZZGVOW?psc=1&redirect=true&ref_=oh_aui_detailpage_o08_s00

http://www.amazon.com/gp/product/B000BW3EJG?psc=1&redirect=true&ref_=oh_aui_detailpage_o08_s00

My one and only complaint is plastic mounting board for fans is too thin my finger points to where I cracked it.
I used 3m double sided foam tape for repair

I did 3m double side tape to help keep the two psu's aligned


http://www.amazon.com/3M-Heavy-Mounting-1-Inch-50-Inch/dp/B00004Z4A8/ref=sr_1_1?ie=UTF8&qid=1449928940&sr=8-1&keywords=3m+double+sided+foam+tape

4 bucks at amazon can do 10 of these

a few more pieces  and notice the plastic strapping

http://www.amazon.com/gp/product/B00207OT30?psc=1&redirect=true&ref_=ox_sc_act_title_1&smid=ATVPDKIKX0DER

I unscrew two screws wrapped it around the two psus and then screwed the screws back in

these two things the tape and the strap make the two psus stable and they will not shift and allow the pcie adapter to get loose.

lastly noctua industrial fans for first set of tests.  these are really quiet but max at 2000 rpm quite possible these will not work.



http://www.amazon.com/gp/product/B00KEST8PQ?psc=1&redirect=true&ref_=oh_aui_detailpage_o00_s00


I am still waiting for cables and for the  2880 watt psu both come on sunday.

[philipma1957]

Here is a screen shot of two avalon 6's 

one is using a seasonic 1200 plat atx

one is using a meanwell 1500 watt volts adjustable.


both psu are 11.9 volts

[J4bberwock]

Here is a screen shot of two avalon 6's 

one is using a seasonic 1200 plat atx

one is using a meanwell 1500 watt volts adjustable.


both psu are 11.9 volts

That's 400GH difference 
which one runs on which PSU?

[philipma1957]

Here is a screen shot of two avalon 6's  

one is using a seasonic 1200 plat atx

one is using a meanwell 1500 watt volts adjustable.


both psu are 11.9 volts

That's 400GH difference  
which one runs on which PSU?

The top one is the meanwell.

the bottom is a seasonic.

The 2880 watter came today still waiting on the cables.

Back to screen shot.

 I am going to take a photo of  the 240 pdu meter with the two units as they are in the screen shot.

I am then going to bump volts on the meanwell (which has great voltage adjustment range but is not really efficient)

The show how pdu raises in power use and how the avalon raises in gh.

So I cranked the volts up  on the meanwell and look at the results.

I move up 500gh 3098 to 3664 really 566 gh.

[Prelude]

Yeah, those fans may be a little weak if you're going to use the full 4kW output. These PSUs have great over-temp protection, though, so you aren't risking them. If one trips because of temp, the other will trip almost instantaneously as it's over-current protection kicks in.

[philipma1957]

@ prelude  yeah I figure the 2000 rpm noctua will work running 2 avalon 6's not 3

@ j4bberwock

so my voltage adjustment on the meanwell jumped me 566 gh  here are more photos

low volt  setting on the meanwell ,  the  pdu
shows amps of the meanwell and the seasonic at 8.7



 at the buss bars watts were 11.82  the screen shot shows gui reads it as 11.9 and the hash was 3098





so 8.7 x 240 = 2088 watts to do 6500 gh  both seasonic and meanwell

next  high volts on the meanwell

amps move to 9.9




meanwell at the buss bars = 12.29 volts

so low
 11.82   volts
  8.7      amps
2088     watts
6500     hash

.32 watts a gh

high
12.29  volts
9.9      amps
2376    watts
7200    hash

.33 watts a gh


the meanwell while great for testing is  at best 87% for power eff

I will get the pcie cables  for   the big servers on monday.

I am going to do one more setup with 2 seasonics and pull the meanwell out of duty.

what will happen is 6400-6600 gh and about .3 watts a gh with both psu's reading 11.9 or 11.8

One more negative to all my testing  it is really hot in NJ we are at 64F .

 so all my results are ambient heat affected.  

My heating bill this fall season is almost 0 usd.

[philipma1957]

So I pulled the meanwell and went back to 2x   1200 watt plat seasonics.

so without a hot psu at 12.2 volts hash drops on the top unit from 3650 to 3250

[philipma1957]

to cool garage  I added a box fan and opened back door



I then put in second seasonic 1200 watt plat




 the pdu amps drop all the way down from 9.9 to 8.5 amps

[Prelude]

Seems you have a bum A6, unfortunately.

[philipma1957]

Seems you have a bum A6, unfortunately.

the top one does well with more power it was at 3650 with hotter volts of 12.2

It is not as good as the bottom one.

The bottom one is really good and can get to 4000 with high volts.

The info I have learned with the meanwell has shown me both the s-7 and the avalon 6 want 12.2 volts not 11.9 volts

and server psus will be the best  choice not atx .

now 2 with 8.5 amps doing 6750 gh is

8.5 x 240 = 2040 watts

2040/6750 =  .302 watts a gh    plat psu's at the pdu meter

I am looking to get

7400 gh with the 2 x 2000 power supply  and use under 2300 watts at the wall.

the key is the 2 seasonics on amazon = 450 usd

even 2 evga 1300 on amazon = 400 usd

the 4000 watt from finksy/j4bbrwock  is 50 for breakout board 50 for cables and I got 2 psu's on ebay for 50

  so 150 vs 400  for 2 avalon 6's   lots of head room will allow for lesser fans.

[Prelude]

Definitely. Server PSUs on 240V all the way. 120V and ATX is outmoded.

Only reason to use 120V is if you're mining in a location that doesn't permit you to modify the existing electric infrastructure, IE an apartment.

[philipma1957]

Definitely. Server PSUs on 240V all the way. 120V and ATX is outmoded.

http://Only reason to use 120V is if you're mining in a location that doesn't permit you to modify the existing electric infrastructure, IE an apartment.

Bolded the 120 volt info

I will be returning my two seasonics since they do not run as advertised. (they suffer from voltage sags at 1050 watts)

And I will have more money in pocket using the 2x 2000 setup.

I decided to load balance the seasonics  ie ½ of each seasonic to both avalon 6s will post back later.

[Prelude]

Are you measuring the sag at the the PSU modular connector or at the PCI-e connector (ie at the end of the cable?) surprising that 2 Seasonic would be defective. Remember that it's normal to lose voltage to wire resistance, you can counteract by using more wires. Perhaps 2 wires per PCI-e port with a 2 to 1 "Y"  connector.

[philipma1957]

Are you measuring the sag at the the PSU modular connector or at the PCI-e connector (ie at the end of the cable?) surprising that 2 Seasonic would be defective. Remember that it's normal to lose voltage to wire resistance, you can counteract by using more wires. Perhaps 2 wires per PCI-e port with a 2 to 1 "Y"  connector.

No question that it is partly a wire issue.

here are load balanced seasonics

rather then  1 seasonic per unit.

I know that  when load balanced you are getting a true measure.

what happened is the better one was on the seasonic using custom wires.

the poorer one was on the seasonic using stock wires.

when I took ½ from each seasonic the poorer avalon improved.

so the problem is more shit stock seasonic wires although the two machines are not quite =

one more test will be done on sunday I will alter the order of machines to the rasp pi

[judypug1956]

 Phil   did you get the parts today?

[philipma1957]

Yes I did I just hooked up the 2 avalon 6's and I am using the middle power setting on the 4000 watt break out board.

middle power on the lcd is 12.17 volts

just about 3500 gh for each avalon 6
I will let it settle and do more photos

but if you look above the seasonic were much lower in gh 6700gh for two

to be fair my garage was at 91f  because outside temps were 72 f .    About 25 f above normal



hit switch and volts moved to 12.57 on meter

gui results are nice

I am close to 3900gh x 2 = 7800gh