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

[Prelude]

Maybe not the right place to post this question, but what is the max load (at the wall) 2880 W PSU can handle day in and day out?
90% of 2880W, 100%?, 110%?

They can be run 100% without issue. I'd even say pulling 3000w from them wouldn't be a problem.

[philipma1957]

Maybe not the right place to post this question, but what is the max load (at the wall) 2880 W PSU can handle day in and day out?
90% of 2880W, 100%?, 110%?

I  don't know but  the 2 x 2000 =  4000 watt psu setup did 4080 watts for 12 hours.  My issue was the weather is too hot to run.


 my guess is the 2880w can do 3000watts with good fans. but I have not yet setup testing for it.

I think the 2x2000 breakout board is the best way to go if you want 3 units of s-7 or avalon 6's in any mixture

[Biodom]

OK, thanks, guys.
i want to run two very good S7 with one overlocked from 600 to 650 (B5) and another from 625 to 650 (B7).
B5 is already slightly overclocked from 600 to 625 and has little error, so why not?
I think that each would do ~1350-1380W at the wall at 650.

[philipma1957]

OK, thanks, guys.
i want to run two very good S7 with one overlocked from 600 to 650 (B5) and another from 625 to 650 (B7).
B5 is already slightly overclocked from 600 to 625 and has little error, so why not?
I think that each would do ~1350-1380W at the wall at 650.

test slow but sure and see what you can do.

my one s-7 goes to 618 with 12.2 volts and it goes to 618 with 12.6 volts.

[bctmke]

Phil,

I love this review - thanks for all of the sharing.

I do have a question though - you must be on the East Coast since we also had record temps yesterday!

70s are unheard of mid december.  We are usually counting feet of snow here.

[philipma1957]

Phil,

I love this review - thanks for all of the sharing.

I do have a question though - you must be on the East Coast since we also had record temps yesterday!

70s are unheard of mid december.  We are usually counting feet of snow here.

Howell ,NJ   

72f    I went to the Jersey shore for a few hours and walked the beach with the wife.

So far these are really good psu's.

 I will run at 12.23 volt middle setting as  the 12.53 does not help the s-7 I own.

I think these are really great with avalon sixes  for a lot of reasons

one) four pcie cables vs 10
two) the avalon 6's I have respond very well at the high setting of 12.57 volts
three) this is quiet with the fans I am using.
four)  I would not mind 3 avalon's on this psu  set to the high setting

[Finksy]

OK, thanks, guys.
i want to run two very good S7 with one overlocked from 600 to 650 (B5) and another from 625 to 650 (B7).
B5 is already slightly overclocked from 600 to 625 and has little error, so why not?
I think that each would do ~1350-1380W at the wall at 650.

Biodom,

PSU's are rated for DC draw (not the at the wall AC load which is after the efficiency drop).  1350W at the wall would be approximately 1,260W DC draw on the PSU using Bitmain's 93% efficiency from their own rating method.  Meaning, even if you could over-clock both S7's to 1500W at the wall (Either 5 TH w/ 135 chip model or 5.8TH/s w/ 162 chip model) you would still be under 100% DC load on the 2880W PSU.

And to answer your question, the PSU's are capable of handling >100% load, I have personally tested them up to around 3000W DC (13.5A at the wall) load for a many weeks.  However, you are going to get considerably lower efficiency over 100% load, and you are likely to reduce their lifespan. Also, once you get over 2900W DC load on them, you start getting past the recommended continuous AC load for a single C19-C20 cable (12.8A, or 3070W at the wall for the 80% rating of the connectors' 16A rating).

Personally, I like keeping them at around 90% load, or ~2600W, which 2x S7's overclocked sit perfectly in that range.

[philipma1957]

OK, thanks, guys.
i want to run two very good S7 with one overlocked from 600 to 650 (B5) and another from 625 to 650 (B7).
B5 is already slightly overclocked from 600 to 625 and has little error, so why not?
I think that each would do ~1350-1380W at the wall at 650.

Biodom,

PSU's are rated for DC draw (not the at the wall AC load which is after the efficiency drop).  1350W at the wall would be approximately 1,260W DC draw on the PSU using Bitmain's 93% efficiency from their own rating method.  Meaning, even if you could over-clock both S7's to 1500W at the wall (Either 5 TH w/ 135 chip model or 5.8TH/s w/ 162 chip model) you would still be under 100% DC load on the 2880W PSU.

And to answer your question, the PSU's are capable of handling >100% load, I have personally tested them up to around 3000W DC (13.5A at the wall) load for a many weeks.  However, you are going to get considerably lower efficiency over 100% load, and you are likely to reduce their lifespan. Also, once you get over 2900W DC load on them, you start getting past the recommended continuous AC load for a single C19-C20 cable (12.8A, or 3070W at the wall for the 80% rating of the connectors' 16A rating).

Personally, I like keeping them at around 90% load, or ~2600W, which 2x S7's overclocked sit perfectly in that range.

Yeah  I have yet to do the testing on the 2880 watters. 

I have a 12 gauge iec cord for it.

This is another reason I like the 4000 watt 2x psu break out board.  It uses 2  psus each 2000 watts and it uses two power cords you can get away with 14 gauge since you are pulling 8.5 amps or so on each psu.

  I think a lot of people will want the new 4000 watt option it is smaller foot print  and more pcie cable up to 30.

At the second setting of 12.23 volts I get a 15 amp or 3600 watt draw for the 2 avalon's and the one s-7  the avalon's really respond to this  4000 watt psu setup.

[Biodom]

OK, thanks, guys.
i want to run two very good S7 with one overlocked from 600 to 650 (B5) and another from 625 to 650 (B7).
B5 is already slightly overclocked from 600 to 625 and has little error, so why not?
I think that each would do ~1350-1380W at the wall at 650.

Biodom,

PSU's are rated for DC draw (not the at the wall AC load which is after the efficiency drop).  1350W at the wall would be approximately 1,260W DC draw on the PSU using Bitmain's 93% efficiency from their own rating method.  Meaning, even if you could over-clock both S7's to 1500W at the wall (Either 5 TH w/ 135 chip model or 5.8TH/s w/ 162 chip model) you would still be under 100% DC load on the 2880W PSU.

And to answer your question, the PSU's are capable of handling >100% load, I have personally tested them up to around 3000W DC (13.5A at the wall) load for a many weeks.  However, you are going to get considerably lower efficiency over 100% load, and you are likely to reduce their lifespan. Also, once you get over 2900W DC load on them, you start getting past the recommended continuous AC load for a single C19-C20 cable (12.8A, or 3070W at the wall for the 80% rating of the connectors' 16A rating).

Personally, I like keeping them at around 90% load, or ~2600W, which 2x S7's overclocked sit perfectly in that range.

Fanstastic!
Thank you very much for a detailed writeup.

[jstefanop]

Thats a lot of cord length for 12v. Be interested to see the voltage drop from PSU to miner. Hope your running at least 16 gauge.

[Finksy]

Thats a lot of cord length for 12v. Be interested to see the voltage drop from PSU to miner. Hope your running at least 16 gauge.

J4bberwock's 36" PCIe cables are 1.5mm^2, roughly equivalent to 15awg.  The Black/Yellow are my standard 24" PCIe cables, and are 16awg.

[philipma1957]

Thats a lot of cord length for 12v. Be interested to see the voltage drop from PSU to miner. Hope your running at least 16 gauge.

I only mentioned that I went with the white 15 gauge in one post . The thread is long you may have misssed that post.
Also this thread was edited by staff as I did multiple repeat posts to show the work in a way that was more clear. Some one must have complained that I consecutive posted.
I told staff we could edit it and Imay have cut out the 15 awg wire is the three foot wire.


Here is the deal  on the white cables in the photo they are 15 awg and 3 ft long,

these are outstanding pcie cables for 4 bucks each.  if you are mining with the avalon six they are a better choice.  since the avalon 6 wants only 4  cables.

if you are using the antminer s-7 the yellow cables are good they are 3 usd each  and they are good quality.  they work better then  you need if you plug 10 into the s-7 voltage drop is not an issue.


and I am now testing 2880 watt psu  I have found a very good sound solution  it truly lowers the noise of the stock 2880 watt fans. and it runs very well with the s-7 I own.

 I have a suspicion that I will squeeze out more hash running 2 avalon sixes with the  4000 watt dual psu set to 12.5 volts and the 2880 watt psu running my lone s-7.

My sound solution for it  works well and is pretty cheap.  I will post it once I fully get it done.

Here is a screen shot of the s-7 running alone from the  2880watt psu  I am doing freq 625 next to perfect and around 5100gh!

I will post meter readings for sound.

  but  57 db and 59 db in my  garage

and 54 db at the entrance to the garage

and 42  db at the den  home theater couch

that is with 1 s-7   2 avalon sixes  1 4000  watt dual psu and 1 2880 watt psu.  17 amps x 240 volts = 4080 watts and just about 12900gh

[nhando]

Hi Phillip, which S7 batch is this that you're able to get to 5.1TH using the 2880W PSU at 625 freq?  Very awesome.  My batch 8 S7 is arriving this weekend and I'm getting a 240V connection soon so it'll be interesting to see what the 2K IBM PSU can do for it.  What Voltage do you recommend setting for the Avalon 6 and S7?  12.5?   

[philipma1957]

Hi Phillip, which S7 batch is this that you're able to get to 5.1TH using the 2880W PSU at 625 freq?  Very awesome.  My batch 8 S7 is arriving this weekend and I'm getting a 240V connection soon so it'll be interesting to see what the 2K IBM PSU can do for it.  What Voltage do you recommend setting for the Avalon 6 and S7?  12.5?    

It is a batch 2 rated for 575 freq!  Got lucky with it.

The Avalon 6 likes the 12.5 that the dual 2000 = 4000 watt psu give it on high setting

The s-7 seems to like the 2880 watter on whatever volts 2880 watt psu gives

I suspect the 15 gauge cables and the fact I am using 1300 watts out of 2880 watts is why the s-7 does so well.

here are results with the avalon 6's and the s-7




and sound meter readings

on the den/home theater couch  with garage door open--- 39.7db



about 46.8  a few feet from garage door



at the garage door 52.4



in the garage 59.7 pointed towards the intake spot



the outflow spot = 60.9  

lastly right at the intake of the 2880 watt psu 71.8 notice sound proofing i will post the sound proofing technique later today.

[judypug1956]

It looks like you used a mattress topper that foam looks like egg crate foam from a mattress topper.

[philipma1957]

Yes it is from a twin sized foam mattress top

 I used a six foot wooden board cut to 36 inch lengths.
I attached the boards to both sides of the psu with double sided 3m foam tape.

under the psu are 3 layers  2 rugs the the egg crate foam

over the psu is a rug

see the 36 inch wooden boards the egg crate foam and a  pair of rugs under it. actually of the rugs is rubber standing pad.



and here is a rubber stand pad over it  the air flow of the fans is full speed with out restrictions


another look at this top standing pad

[judypug1956]

 Phil are those materials fire resistant?

[philipma1957]

No they are not fire resistant but I have a fire proof pad on order and will add it and photo it for everyone



http://www.amazon.com/Automotive-Sound-Noise-Insulation-Padding/dp/B006LNWE7W/ref=sr_1_2?ie=UTF8&qid=1450358979&sr=8-2&keywords=engine+sound+insulation



I have used the material above and it is fire resistant on the foil side

[nhando]

Seems like a lot of work and add more cost / real estate space when noise is a concern with the 2880W PSU.   I want to thank you for the recommendation on going for the 2 x 2K PSU instead.   The 2X2K IBM PSU have a much smaller foot print and noise is fully controllable based on the fan chosen.


P.S  The fan you recommended just arrived.  I don't have any brackets for these PSU.  Would those Tape you recommend be sufficient to mount these FANs.  I have that on order as well and it should be here by Wednesday.  The individual 2K board makes it much harder to combine the PSU then with the newer board you got.   Can't wait for Finksy to release the new board to the public.  I'm definitely in line to get 1.  Really love the hashing results you been publishing.  It definitely justify the cost for me upgrade to 220V outlets.

[philipma1957]

Seems like a lot of work and add more cost / real estate space when noise is a concern with the 2880W PSU.   I want to thank you for the recommendation on going for the 2 x 2K PSU instead.   The 2X2K IBM PSU have a much smaller foot print and noise is fully controllable based on the fan chosen.


P.S  The fan you recommended just arrived.  I don't have any brackets for these PSU.  Would those Tape you recommend be sufficient to mount these FANs.  I have that on order as well and it should be here by Wednesday.  The individual 2K board makes it much harder to combine the PSU then with the newer board you got.   Can't wait for Finksy to release the new board to the public.  I'm definitely in line to get 1.  Really love the hashing results you been publishing.  It definitely justify the cost for me upgrade to 220V outlets.

i think the 2880watter is good if you do not have a sound issue.

i would not want to do five of them if i had to sound proof them.

i came up with a plan to mount fans   for the 2000 watt psus  send me a pm i will mail a kit to you if you are usa based.