Topic: Update Large review of Finksy/J4bbrwock server psus compared to ATXpsu-photos up - page 6. (Read 20897 times)

That looks like the Houston highway map.  So basically above 75 is not ideal based on the info above. I will keep that in mind.

Here is a synopsis of the Temp on the Avalon6- hopefully it will ease your mind.
(btw- I would only post the same post once and not repeat on separate threads, people get angry about that stuff around here.  Me, I just answer it twice  )

Got my Avalon 6 Baby on 12.5V right now.  So far so good at 3879GH/s.  Let's hope it remains at that level.  Temp is at 74 / 76C which makes me feel a bit uneasy.  Just raise min FAN speed to 60% to be safe which brought it down to 73/74C.  Either way, my little baby Avalon can now keep up with the big boys!!  It's like getting a free S3.  =)  Not sure how hot it will run in the summer, makes me uneasy that it's running this hot already when my garage is  just at 76F.

P.S I tried the 4 x 2KW IBM PSU sideways stacked on top of each other.  I don't think this is a good configuration unless you put the PSU at the of end the RACK and vent it to the outside, otherwise it will make all the equipment next to it very hot.  This may be less of an issue if you have box fans blowing from behind but I think it's better to have the hot air go up instead.  This will also help keep the FANs more secure with just using the Scotch Tapes.  Also it's been almost 2 days that I'm rocking the 3 x S7 using the 4K bundle at 731M without any issues.  Looks this this 4K bundle is the real deal.  Just ordered a bunch more 4K cards.


Update -  I noticed that when FAN is set to 60%, the average drop to 3780 or 3800  from 3850 plus when fan is at 50%.  Are others seeing similar results?  This is after the unit have been running for at least 20mins

No problem! 2 of these along with your dual breakout board is probably the best way to power miners today IMO. Could even make it a 5000w setup with your board using DPS2500 instead, and get slightly better efficiency to boot.

Great to know, thank you!

4080w x 0.89 = 3631w DC, so you were still under the 4000w spec.

I've run 2 DPS2000 for about a week pulling 4500w DC from them and they didn't even blink. They are super tanks, massively overbuilt. The fact that you can adjust the OCP protection up to 196A via a trim pot should give you an idea.. These guys were overbuilt and under speced to 2000w in order to get higher efficiency I believe. When you're running at 100% 2000w capacity, it's likely that you're only actually using ~80% or so of the PSU's capacity.

So far it's running fine for 16hrs and I overclock them to 731M just to see if I do in fact have extra head room.    The garage temperature is a cool 65-72F and the PSU are a little warm / hot but nothing crazy.   Will test it over a few weeks and see how stable it is.  If it can run at this higher OC rate, 700M and lower will be easier.   The 4K board only have 2 FAN connections so I can't add another pull fan even if I wanted to vs the 2 x single board where you have plenty of FAN connections.   Pros and cons to both.  Either version, you can't go wrong.  Really like this 4K bundle, soon to be 8K Bundle once I get the additional boards installed tonight and stack the PSU 4 high.  Can't wait to BOOST my AVALON tonight!

I ran 17 amps x 240 volts = 4080 volts for 3 ½ days

 2 scythe fans cooled the  dual psu  zero issues

i was doing 2 avalon6's and one s-7

4000 watts and 3 S7's should run fine- you have plenty of headroom

I am stable running 3 avalon6 on a single 2880, I suspect I will run into those issues without proper cooling.

All of the server PSU's will shut down at a set temperature.  I suspect if you are worried about it for the summer and if you are overvolting, you will see very quickly.  

Also, I assure you the PSU's are way more solid than most any miner as far as build goes, I would be more concerned about the miners than the PSU's

Anyone know if these IBM PSU will automatically shutdown at certain temperature threshold?  Just preparing for the summer especially since power 3 x S7 Batch 8/9 will be maxing these PSU at 100% load.  Want to make sure there's some extra safety built into these PSU like how the Antminer have auto shutdown at 80C

Thanks again for the reply and your help, Prelude.


Yes, that's exactly what I had in mind with the junction box wiring up multiple fans.  If I end up going this route, I will not begin the purchase of these until AFTER my power upgrade.  I'm already spending quite a chunk of change on the power upgrade.  Waiting on 2 more quotes to be emailed to me.


Yes Sir, I was confusing them.  I think I might go ahead and order two of those radiator fans at $23.99 each for the hell of it to have them going 24/7 to see how long they last.  However, I believe these Papst are the way to go.  I think it's more important at the moment to have 2 x 30 inch 7,800 CFM fans (15,600 CFM total) pulling heat out at the window in the mining closet and 2 x 30 inch 7,800 CFM fans (15,600 CFM total) pulling fresh air into the recreation room at the other window for redundancy.  Dance, was right in the "Miner Photo Porn" forum about the importance of having back up fans going in case a fan breaks down.  So, I think that holds higher priority than the other fans in the doors at the moment.

Yes, not 12V DC, it's 220-240V AC. It's rated at 181.7w (0.79A x 230v) so really any wire will do. I'd probably use 14AWG flexible extension wires since I have plenty of that lying around, but you could use 18AWG with ease. If you're going to have a bunch of them on your door, I'd skip the plug and wire them all together in an electrical junction box wired for 240V.


I think you're confusing duty cycle with MTBF. I have no doubt that those Papst will last MUCH longer than the radiator fans, but you should look up their rated MTBF.

So the "Duty Cycle" on these fans is for quite a long time?

The reason I ask is because the "Duty Cycle" on the radiator fans at 100% 24/7 is probably only about 2000 hours (83 days).

So, this is not a fan to connect to 12VDC apparently.  It sounds like [From what you are saying] I need to buy a cord from Amazon or local hardware store for 208 to 240 VAC and wire it up to the fan [Plugging it directly into 208 to 240 VAC?  If this is the case, do you have any particular 208 to 240 VAC receptacle and cord to recommend?

No, haven't given up.  I'm just weighing ALL options.

Gave up on the other 2K CFM Fan DMwardjr?

Not sure but Papst makes some badass fans

http://sigma.octopart.com/10607752/image/EBM-Papst-W2E200-HK38-01.jpg

might be screws terminal, like in the first batches of antminer s1

It probably has terminals for you to connect the wires to directly, then you can put whatever plug you want on the other end? Nice looking fan.