He isn't looking at anything.



He works as an electrician at Tropicana.  He said that some of the power supplies they use up there will take 110 or 220 also but that once you hook it up it always wants whatever it was hooked up to first.

He wasn't sure if the computer PSUs were the same.

I have two 5 card rigs.

Each one has 2 PSUs.  The PSUs say they are 110-240V.  At 110V they use 12 amps, at 220V they use 6 amps.


My whole house is mostly wired with 15 amp breakers.


I have a friend who is an electrician and will come run me a couple 20 amp 220V breakers/outlets.


Only thing is he isn't sure if you can plug the PSUs up to 220 once they have been plugged into 110.


None of the PSUs have 110/220 switches on them.  They are supposed to automatically sense which V it is hooked up to.  But I know some PSUs (not computer ones) want whatever they are hooked up to originally.


So since I have already been running my PSUs on 110 can I switch them over to 220 or will they not like that now?



Much thanks!

I dunno.  I tried two different 1200W PSUs and I tried two different 5 x 7950 BAMT rigs.


I could start pulling cards to see if one is consuming too much power but I have two separate rigs each with they're own 5 cards.  So both rigs would have to have a card or two with big power problems which seems very unlikely to me.  Unless I'm wrong.

See my thread https://bitcointalk.org/index.php?topic=205406.0.



I am was having power draw questions too.  I think that mining LTC on top of OC ing the cards makes you draw alot of power.

Thanks once agin Phillips.


So I changed the port in sshd_config and I also changed the port in ssh_config.  I think you were confused as to my intentions.  I wasnt trying to change the ports to be able to view it locally I was changing the port so that I could foreward it in my router settings so that I can SSH into it from wherever I am using my iPad.

I know I could just SSH into one of the rigs and use mgpumon.  But I like using gpumon better.  So now I can log in to both rigs and use gpumon.

So I did some more testing.

I have another rig identical to the one we are talking about here.  Only difference is it has the ASRock 990 EXE4 instead of the 970 EXE4.  Everything else is the same.


So I switched this rig over to BAMT yesterday and I hooked up one of the 1200W Silverstones as the main PSU.  Running 3 cards and the rest of the system.

Same results 1150-1200 watts.



I tried hooking up a Cooler Master 1200W gold PSU as the main PSU and it actually reads more W.  It reads 1200-1250W on my kill a watt.


If you look at this thread https://bitcointalk.org/index.php?topic=208299.0 he is getting about the same results.


Only thing I dont get is that the second PSU which is only running 2 7950's and a case fan only pulls 450W.


So to summarize I have 2 seperate rigs with nearly identical hardware which both draw 1150-1250 W on the main PSU running 3 7950's and the rest of the system (no matter using Cooler Master or Silverstone) but which only draw 450 W on the second PSU running 2 7950's.

Maybe I just haven't heard of it but is Lepa a decent brand?


I only see 1 review on Newegg, and 1 review on Amazon of this PSU.  Even though its 80 plus gold rated, running it near 100% capacity especially 24/7 isnt probably going to last long.



http://en.wikipedia.org/wiki/80_Plus

Also look at what 80 plus gold actually means.  At 100% load its only putting out 87% at best.  So 870W.


So even if your cards were only putting out 200W then your still too much power.

Plus you have to add in everything else.


The powered risers will draw 75W each if Im not mistaken.  Plus you got the rest of the system and the SSD.

I have 2 Sapphire 7950's that are at 1000/1250 and they draw 250-270 W.


I dunno if your using Windows or Linux.  But if your using windows and the computer just turns off with no BSOD and no Windows shut down unexpectedly error thing than its the power supply.

Use a kill a watt. You might be surprised how much power they use.


The 7950's TDW is 200W at stock clocks.

Thanks

Do you know how I can change the port that I SSH into on one of my BAMT rigs?  As in, right now I got one at 192.168.1.107 and the other at 192.168.1.109.  I have set in my router to forward the 192.168.1.107 one on port 22.  This allows me to view it from outside of my local network.

But I cant forward both IPs to the same port.  So, can I change the port on one of the BAMT rigs so that I can forward it?


I know I can use mgpumon but I like doing it this way.




Thanks again!

Is it this one?


http://dustcoin.com/mining

Thats another thing I was asking before.  Should I hook the two PSUs together instead of the paperclip?

Would that make a difference?  Or is that just so they turn on together?

That is how I have it hooked up right now.  I do NOT have them hooked together, just a paperclip in the second one like you said.



I switched them around and its the same thing.  The one with the system and 3 cards hooked up is drawing like 1200W.



But here is something else I found.  When I was swapping them over I noticed something I forgot to list.  I forgot I also have 2 molex's hooked up to the main PSU from the riser cables.  So thats 75Wx2 = 150W right?


So  250 X 3 =750, + 150 from the riser cables = 900  + whatever power the system is drawing which is ?  I dunno what like 150W.  If so thats 1050W right?  Or am I wrong?

Thanks



When I treid to assign an IP I couldnt get it to mine.  It said it was mining but it wasnt showing any KH/s.  I know this is because it has no internet connection because I forgot to hook up the ethernet cable once or twice and thats what it did.

I changed the IP back to auto and it started working fine.


Does this mean I have to change some things in my router?



And do you reboot from mgpumon?  I know gpumon has some things you can do that it shows you when you press ?.  But I didnt see any options to reboot or coldreboot or anything like that.


Or is the coldreboot a command you enter through SSH?

So I tested the kill a watt.  It works fine.  I hooked a hair dryer to it that says it is 1575W and when I turned it on hi it was pulling 1500-1520W.  I hooked a 100W light bulb lamp up to it and it read 95W.



So this is where it gets wierd.  I think maybe I have a bad PSU.  Instead of hooking the kill a watt back up to the same PSU that is running the system and 3 GPUs, I hooked it up to the PSU that is running the 2 GPUs.

This PSU is only running 2 GPUs and 1 case fan.  thats it.  The rig is mining right now and it is reading 490W.




So how can this be?  Does this mean the PSU that was reading almost 1200 W on three cards is bad?

Oh yea and I am not doing anything with the CPU.  Just mining LTC with the GPUs.

This is the system.


ASRock 970 EXE4
Athlon II 270
8GB DDR3 (4 x 2GB)
1200W PSU running 3 7950s  Another 1200W at the moment is powering the other 2 7950s.
No HDD just a USB stick with BAMT on it.
The W is being measured with just the PSU plugged into it.



I am about to test the meter.  I will report back what I find in a few mins.

Can it be the way I have the dual PSU setup?


All I did was short the green wire to ground on the ATX connector on the second PSU.



I saw another guide that showed splicing the green wires from both PSU ATX connectors and also both grounds.  It says to do this and also to splice pins 7 & 8 together which is the power ok and ground.


I don't see how this at all could make the cards draw this much power.  But I dunno.


I will test the kill a watt tom and report back.

Yea.  I have these PC Power & Cooling 500W single rail PSUs that I was planning on running my 5 card off of and I cant even run 1 card off of those.


But yea the above pic is just 3 cards.  I have the other two cards running off of another identical 1200W PSU for the time being.  My original plan was to run 4 off of one 1200W PSU and the other card off of one of the 500W PSUs.

And this is no overclock on these 3 cards.

But I cant get it to run like that because the cards are taking so much power.