Topic: Update Large review of Finksy/J4bbrwock server psus compared to ATXpsu-photos up - page 10. (Read 20978 times)

1293W isn't their DC power consumption though.

As per bitmain's specs:

Power Consumption: 1293W + 10% (at the wall, with APW3, 93% efficiency, 25C ambient temp) 1293 x 1.1 = 1,422.3 W at the wall with 93% efficient PSU. . Back-tracking you get 1422.3W x 0.93 (taking out their rated PSU) =1322.74W DC, 101.75% load on a 1300W G2.

They started adding the +10% for power consumption when they started offering the 135 chip S7's, that isn't the PSU efficiency being added.  At least that's how I interpret it, I don't have anything post B6.

2880 watt psu tests

30 min

amps 9.1
volts 241
dc  12.20
dc  12.10
dc   12.00
hash 6879
watts 2193
watts per gh 0.3188

1 hour

amps  = 9.0
volts   = 241
dc      = 12.20 at the one un - used pcie cable
dc      = 12.10 at avalon 1 software reading
dc      = 12.00 at avalon 2 software reading
hash  = 6872
watts = 2169
watts per gh = 0.3156

2 hour

amps  = 9.0
volts   = 241
dc      = 12.20 at the one un - used pcie cable
dc      = 12.10 at avalon 1 software reading
dc      = 12.00 at avalon 2 software reading
hash  = 6849
watts = 2169
watts per gh = 0.3166


7 hour

amps            = 8.9 9.0
volts             = 240
dc                = 12.20
dc                = 12.2    at avalon 1
dc                = 11.9    at avalon 2
dc                = 11.98   backprobe of both avalons were 11.97 and 11.98
watts           =  2160
hash            =  6830
watts per gh =  0.3162


I am done with   2880 watter

Next is 2980

30 Min

amps          =   8.5
volts           =  240
dc               =  12.15--------empty pcie
dc               =  12.10 -------avalon 1
dc               =  12. 00 ------ avalon 2
dc               =    ?         backprobe is hard to do
watts           =  2040     this is a 120 watt improvement   but dc is 12.15  vs 12.20
hash            =   6780        this is slightly less due to lower volts
watts per gh =  0.3008      this is  better then  any of the 2880, but by a little more like 4.9%  not quite 6%

early test  of the 2980  will do more in the morning.

A note on the 2880w  pulling the fan pack is easy to do
a note on the 2980w  pulling the fan pack is hard to do.

second note the 2880w  will allow you to do the kilo17 mod.

the 2880w is a special 4 pin with a jumper setup for each of the 3  fans the psu's will run with fans not attached.

the 2980w is  a tiny four pin pwm  you may not be able to run the 2980w with out the fan pack attached.



so all I am sure of is the 2980 stock runs 5% better then the 2880 stock. in the 30 minute test.

Thanks......WEMO is showing 1540W..............  Not loving that number too much.  Don't even like 1400W number.  Definitely want better efficiency.

It should be 99.46% load on a 1300w G2. The math is 1293W/0.88eff(@120v input)=1470W at the wall. Just a bit over the 12A/15A 80% limit. Not excellent but not bad either. Should be getting mine tomorrow to get some real world tests.

those  headers for the fans are small four pin not three pin.

i am not ready to test the 2980 but the bottomline is it appears to be 100 watts better on a 2000 watt load.

say 2000 vs 2100.
 
i am going to check watts tonight and tommorrow on the 2880 then do full

watts on the 2980 the fans are due on fri so i will post fans on sat or sun.


i found on my batch 2 s-7 that it liked the 12.2 volt setting on the 4000 watt psu

also it did well on the 2880 watter which about  12.2 volts.

i got  freq 637 5150gh on a freq 575 unit.

i only have the two avalon sixes for testing.

the s-7 is at my buddies office.

Thanks Finksy, guess no more using the EVGA going forward and just stick to my 2000W PSUs.  Can't wait to get your new 4K boards!!!!!!!!!!!!!!   


Phillip - What should I expect at the walls w the 2K PSU for Batch 8 @standard Freq?

They seem like regular 3 pin header, check philip's pictures. I don't think 2880W has 3 pin header, but I may be wrong. All of my 2880W are at a hosting place. May be smaller than 2x 120 mm will work? If somebody can stack 2 PSUs and measure?

Are those standard 3 pin headers?  I hope the 2880s have them too.  I'm not sure that the area is wide enough for two 120mm fans since kilo's 180mm seems to fit pretty well.

Maybe 2 120 or 140 mm fan will work? I have 2 2980W PSUs coming on my way, I will be able to check. Good thing is 2980W has built in 3 pin header for fans so adding any fans would be easy.

Just my luck that I only have enough power to run two 2880 PSU and not three.  I wonder if it's possible to use the 180mm fan with just two units stacked.

The B8 S7's pull around 1330W DC (rating of 1422W at the wall with 93% efficient PSU as per bitmain's specs) which is over 100% load on your EVGA 1300. This would make effective efficiency 86-87%%, which would be about right considering how high the load is on it.

Phil,

Don't worry most of "these people's" barks are worse than their bite.    We appreciate all the testing you are doing here, I am very anxious to see the 2980's numbers, sounds like prelude was right on the money so far.

Also, did you by chance compare voltage by back-probing the loaded PCIe cables to see if there's any noticeable voltage drop vs the loose one?  and if the avalon's gui for voltage is accurate? I've heard varying testimonies about it.

Haha, I want to LIVE.............When you have a chance, please also compare where the 2000W PSU stack up in the efficiency.  I'm assuming it would be somewhere in the middle.   Also can I trust my Wemo Insight?  It's showing that the B8 S7 is pulling 1540W at the wall.  That sounds way too high for such an efficient PSU like my EVGA G2 1300W.

Sure...  Gotta do what you gotta do.

Appreciate all you're doing...

got to go to a meeting I will post more tonight.

DAAAAAAAAAAMN....  LOL

Those are some big ass caps.   LOL

Hence, the yellow tag caution of high voltage and caution of opening and poking around with a screwdriver.

please be warned this is a psu with big ass 450 volt caps you can die if you do this wrong

So to open case up all risk is assumed by you

Okay so the 2980 watt fans do not come off easy.

so the case needs sliding
this little door gets you to the power plug

there she is







un plugging the power allowed case to slide enough to pull the fans.  I will post more later.

Thanks for doing this, Phillip.  Much appreciated!!!

I gambled on Preludes previous assessment and tried to purchase the last 8 units that person on eBay had remaining.  There were 3 other offers ahead of mine.  I don't know what they offered but I offered $75 each for the remaining 8 units.  He got back to me about 10 minutes later and told me he sold 2 of them but I could have the remaining 6 units for $75 with free shipping.  So, I jumped on it.  I've received 2 x 2980's from the other seller at $150 each with free shipping.  With this present seller, I was able to get 10 x 2980's in total at $75 each [1 shipment of 4 units and 1 shipment of 6 units].  I plan on buying the 2980 from here on out and using the breakout board originally made for the 2880.  The only thing [And it's no big deal] is the white plastic screws from the breakout board do not go in the holes on the back of the unit to connect the breakout board to the unit.  The holes are twice the size of the holes on the rear of the 2880's.

It's tempting to do what kilo has done with the one large fan for 3 units.  I think I will wait for further results from kilo and phillip [under at least 80% load] before I begin buying the 180mm fans and taking apart the 2880's and 2980's.  

I will be so glad when my power gets upgraded.  I have an electrical contractor coming tomorrow for another quote.  I have one coming Monday to give a quote and I have one who came by last week and is supposed to email a quote to me Friday or Monday.  Wish me luck... It's important to me to get this done as cheaply as possible.  I had one quote me $18,750 for upgrading from 200A to 800A service.  I more or less told them they can take a hike.  I had another one tell me to tell him what I paid for the disconnect switch and panels and he would simply subtract it from his quote that included the price he would charge me for materials.  I told him what I pay for materials is none of his concern and that he needs to give me only a quote for the labor.  He told me the same thing again.  Which I told him AGAIN, "What I pay for materials is non of your concern."  He said, Just call me when you have your prices. Then I literally told him, "You can take a hike too."  Then hung up.  LOL

here are 2980watt photos .. it is a lot harder to pull fans

these say plat


and they are delta



many screws










I realized at this point I was going to fully open the psu

Remember if you short it out burn down the house your gear your dog  your self.

 oh well I did not tell you to pull the loud ass fans power hungry fans.

it is your choice and if you do it wrong you are taking on the responsiblity