Quote from: wunch on February 06, 2014, 09:31:09 PM

Quote from: loshia on February 06, 2014, 08:04:18 AM

Quote from: bemocom on February 06, 2014, 07:16:57 AM

Quote from: loshia on February 06, 2014, 07:06:29 AM

Quote from: bemocom on February 06, 2014, 06:53:24 AM

Quote from: loshia on February 06, 2014, 06:49:07 AM

Quote from: bemocom on February 06, 2014, 06:36:21 AM

Quote from: loshia on February 06, 2014, 06:14:56 AM

Quote from: bemocom on February 06, 2014, 05:08:26 AM

Hi

I have a big problem.
I have 5 miners and all of them work fine IF a let them work one by one...even two together work fine.
BUT.....

If i want to let 3 miners work together, the PSU crashes.

The miners, the hub and the MR-3020 are ALL conected to the same PSU-Molex cable-tree.
The PSU has 550W....

What can be the problem?

Can it be that the PSU is too old even it has NEW 550W?

Pls help me ..... i cann't solve this problem

what is the rating AMPS of PSU 12V rail is it a single one?

PSU-Model: pentium iv & pfc model lc6550G version 2.0

MAC DC OUTPUT:

Voltage 230V:
+3.3V -> 35A
+5V -> 40A
+12V1 -> 16A

Current 4A
+12V2 -> 18A
-12V -> 0.8A
-5V -> 0.5A

Frequency 50Hz
+5VSB -> 2.0A
BLK - > COM
GRN - > PS-ON
GRY -> PG

I made a shortcut betwen the green and black cable to turn the PSU on without motherboard.

So
1. Chosse a single rail PSU
2. When board is OC-e it is eating about 9.5 Amps
So if i were on your shoes i will connect just two boards to this PSU when i am absolutely sure that each board is connected on a separate 12V rail. Does this explanation clears up a mastery crash;)
And do not push it to much magic smoke will come out sooner or later. I am not joking here i am serious

So you say that the PSU is too poor to run more then 2 boards at once?

Will a new PSU work better and how much power do i need to run all 5 together?

Would this one do the job?

http://www.coolermaster.com/powersupply/v-series-psu/v1000/

Dude,

First please excuse me i just saw that it is Avalon2 boards. So i do not know what the board consumption is but i know that it is getting close to Avalon1 And definitely i say that i would not run more than two broads on this PSU. Whatever you do choose a SINGLE rail PSU. Do you know to what rails are the boards connected i guess no.. and so on

PS:
http://www.coolermaster.com/powersupply/v-series-psu/v1000/

Yes it will do and you will have a room for more boards this one is too powerful.
My advise is to measure exact board consumption on 12V and choose appropriate one you can save a bug for sure. If this is not an option for you go with 1000W Wink

I just orderd one of these PSU's and in a few hours i will try it out.
Hopefully it's gonna do the job.

Thank you very much for your help so far. I'll gonna give a feedback when it runs.
;-)

It will do the job. Just make sure you use all molex cables. Do not connect more than one miner to a single molex cable even though it has two more connectors in parallel. Unless you ought to Wink

This is the best advice here. If you have more miners then Molex then use a ATX 4 pin extender to molex or 4 pin extender and cut the cable off one end. That way you still get 12v but it is not all on the same cable. Even a single one can cause the molex wires to be warm.

Well....

I have the things pluged together and everything works just fine and smooth.
Two Molex-Cable and three SATA-Cables with Molex-Adapters.
Every miner has its own powercable and the cable keeps really cool.

My configuration for the miners are:
[Frequency] => 1400
[Core Voltage] => 1000
and i get
[MHS 5s] => 22.33G
[MHS av] => 21.39G

I know that i could go up to Frequency 1500 and CoreVoltage 1100, but i get not more hashes.
I need just more Watts.

Thanks for your help and advise to everybody here.

Happy mining