Topic: NEW PSU Died After 24 Hours? (Read 2546 times)

That is very good point. I only run my PSU at most 70% of the rated power.

Is there any guide online i can find that will help me to do that.

In future rigs i guess 2 psus would be a better option

Which psu do you recommend for a 2 psu mining rig.

Thanks

Yes it supports running 6 gpu but you should undervolt your gpus. I'm using Sapphire Nitro RX 480 models and each gpu pulls around 130 watts after using a modded bios and undervolt.

does the EVGA Supernova 1200p2 support - 6 rx480.

i have one rig with a 1200p2 running with 4 gpus. 2 more gpus are on the way.

do any of you guys have an EVGA 1200p2 running with 6 rx 480?

thanks

This is  a good point.


I once had an extra part in a psu it killed the mobo and the cpu

you have insect or screw trapped inside your PSU, it happened to me

I've carefully applied all steps and I'm glad to say that 6 gpu mining works well this time. Maybe I'll be adding more gpus if I can add a second psu.

Thank you for your great help.

For all others it is safe to say that 6 gpu mining on z87 deluxe quad is confirmed by me You need to disable following onboard features:
integrated gpu
wifi
bluetooth
thunderbolt
realtek lan (maybe you can keep it active but you already have intel lan as well)

I haven't tested this combination but maybe you can disable both lans and use wifi. In my test it has failed (while igpu was enabled).

Yeah I don't push my cards I do four card builds and I use evga 750 p2 with zero issues
My rigs pull 600 watts max

Thanks for suggestions but as I already stated I was using modded bios and at most I loaded my PSU with 850 watts most.

Hello
Late 4 the party i know, i just saw that.

6x RX480 uses more than 1200 W

that is a CONSUMER GRADE PSU, it is not a server grade

you should never EVER use a consumer grade PSU at more that 60% load capacity.

you should use 2 x 850W single rail, dual conversion (identical PSUs) with something like ADD2PSU gadget OR....
buy a 1700W PSU consumer grade.

even if you buy a server grade PSU, never use it over 80% load (continuous), at this point all bets are off.

i always use PSUs at 50% load rating, since 2013 i buy probably more than 300 PSUs for mining rigs, never EVER blow one of them, but i always load them at 50%, not more, need more power, use two in parallel with ADD2PSU (actually i made my own, it's freaking easy)
more power?, add another one, if they are identical you can put three in paralell doing an add2psu gadget.
(this is only possible if your psus are dual conversion, otherwise you will have a load of trouble)

and buy ONLY PSUs that are DUAL CONVERSION (that means that converts ALL power to 12V and then use separate VRM for 5v and 3.3v but the main transformer only produces 12V, so that you know that, if you don't use 5V and 3.3V you have all the power available for 12v rail)

another thing. first PSU in the rig powers all the risers, and the first two GPU (the one connected to the 16x primary slot) and the PC, the rest powers just the GPU 6/8 pin connectors.

missed this.so you go to a two pin wall socket?

Let's try your adapter.

Do mobo only no gpus.
Pass that test do one gpu
Pass that test do two gpu


Let us know if it
 Works with two.

Then test with three, four, five, six .

http://urun.n11.com/adaptor-ve-cevirici/ay-ka-toprakli-ingiliz-fisi-cevirici-amerikan-fis-P77184027

I've used this product and noted following:

Bottom of adapter says 13A 250V
PSU cable has 15A 125V

Shall i buy a better adapter? I was hesitant to use this one but seller said there would be no problems. If required would you recommend following?
http://urun.n11.com/priz/universal-fis-priz-cevirici-adaptor-donusturucu-P149754987

Sorry for Turkish links. It is difficult to find quality stuff at local stores here.

okay  lets see a link  for the adapter as the adapter  may be the cause of the short.

under small test load  which passed you are fine.  check 1

check 2 is a look see at the adapter.

check 3 is not to be done until check 2

It sucks  but   I have had cheap adapters kill psus and gear.

Once we figure out the adapter is good or get a better one

check 3 is  plug the  24 pin into the mobo  plug the cpu cable into the mobo  using no cards  boot and see if the mobo posts.  this means you need to plug a video cable into the mobo's video

check 4  if check 3 passes    put in 1 video card  fire it up  don't mine with it.

check 5 if check 4 passes   test that same video card in all six slots don't mine with it

check 6 if check 5 passes  test the same video card in all six slots  via mining with it  1 hour each slot

check 7 if check 6 passes add a video card  mine with 2 video cards for an hour.

check 8 if check 7 passes add a video card mine with 3 video cards for an hour.

check 9 if check 8 passes add a video card mine with 4 video cards   for at least 2 hours

check 10 if check 9 passes add a video card mine with 5 video cards for at least 6 hours.


at this point  if you have 5 working video cards  you may as well stay at 5.  going to six  may not be worth it

Hello, I've received new psu (EVGA 1200 P2 again) and tested it using built-in psu tester for a few minutes. Fans spin and it looks like it is working.

Today, I'm going to put back old breaker back in breaker box as suggested and listen your suggestions.

I've Belkin F9M823YY2M-GRY as 8 socket surge protector. I can use this if helpful. Besides, I have used very cheap US to EU plug converter with dead psu. Shall I stick to it or order a better one? My PSU has US plug. But my location is EU so i need a converter.

I've figured out that that 25Amper breaker was connected to almost all wall sockets, air conditioner (not used at winter), gas combi and my pc.

Remember I've said I've a very good cable that is connected to 40Amper breaker, it was used for instant water heater at my bathroom but later it became available for other possible uses. At this time, we are not using it but I may need to extend that cable if you suggest to do so.

I'll apply your recommendations before turning my miner on again

i have just sent 12 x 1300 Gold psu back to evga out of about 200.  As soon as i turned it on it sounded like a shotgun went off.  They were almost all sequential as well.  I thought I was doing something wrong, turns out it was a bad (weak) internal fuse.  They took them back asap no questions

advice: add another layer of protection!

I'm using surge protector extension wire (2500W rating) that has a push to reset breaker built-in --> serves as first protection before the breaker trips

20A breaker --->to 2x outlet at 16A (socket rating each)
       - 2500w surge protect extension wire per outlet


some maths: (the secret is in the Amps)

20A breaker / AWG #12:
 plug 1: 2500W/220v  = 11.36A (~max)  --> outlet is 16A rating (safe) , wire is 20A breaker (safe)

 plug 2: 2500W/220v  = 11.36A (~max)  --> outlet is 16A rating (safe) , wire is 20A breaker (safe)

notes:
  - if 2500W is reached in both of the 2x surge protector extension wires (11.36A x 2 = 22.72A) the 20A breaker trips (solution: reduce load)
  - if one of the 2500W protector extension wire trips (11.36A reached or exceeded) (solution: reduce load)

the the load in my 2500W surge protector extension wires are tested thru time when voltage fluctuates, if voltage goes down (power company's service transformer get loaded) Ampere goes up a bit(ohms law)..today a one of my 2500W surge protector extension wire tripped(been running for about two weeks already), I unplugged my rig with 1x r9 390 and plugged it in my newly bought 2500W surge protector extension wire (will add a rig or two there for expansion).

 

Put the old breaker back in the breaker box.

Once you have the replacement let us know.

At this point. I suspect the psu was defective and popped a cap.

It happens.

@philipma1957
I'll come back and tell you once test is passed with new product. FYI, I've tested current PSU before connecting components to it and it has acted very well with built-in tester. But it died later, as I stated.

Shall I downgrade the circuit breaker back to Siemens B25? Remember I've upgraded it to Siemens B32 without upgrading cables. Due to building is 25 years old, it is difficult to change cables. Maybe I should create a new electrical line through wall but not sure what would be the best way to do it. I belive it will be impossible to use existing tunnels as they are very tight.

It is tripping breaker, nothing like blow. Once I turn on breaker, breaker is working again. But PSU is tripping it even with only PSU tester is attached.

I've bought PSU from an online store. Other components from different store. The box was unopened and I can tell, product was unused. Unless it was refurbished.

@stoniestfool

Correct, I also have kill a watt and I'm pretty sure 5 cards was pulling around 800 watts. Even with 6th gpu I should be pulling around 950 watts. I'm using another computer to mod bios of gpus before connecting them to new rig.

Yes, it was hashing ETH using Claymore and my hashrate per gpu was 29.3 using modded bioses.

PSU tester is attached to mobo cable. So nothing else was connected while testing PSU after issue.

Most likely due to a short this issue is happening. But I'm not an expert so I'll be following suggestions posted here.

There is no greater chance of a refurbished psu to caught fire than a new psu. You will get slightly less efficiency the same as if it were used. That is because caps wear overtime. How motherboard manufacturers advertise how many hours of use their caps are rated for.The fire hazard would be from improper installation. As far as longevity goes a refurbished psu would be fine for a pc that is not running constantly. For a mining rig that will run constantly that is just a bad idea.Probably why this psu died after 24 hours.

This thread now has me thinking. A nearby store has a few Corsair AX1200i on sale (well they are actually refurbished) for around $150 each. I was going to take a chance and pick a couple up, but my first concern was they only carry a 90 day warranty. Now I am also concerned if they might be a fire hazard, as what was the reason they were refurbished.  Anyone have luck with refurbished PSU units? The store does have a 30 day policy, so if anything is immediately wrong I am ok, but I am think of once past the 90 day mark.