Mother Mine - Extreme Mining Setup
- Thread starter wndsr
- Start date
Man of Honour
Won't his electricity supply cope with this lot?
Soldato
- Joined
- 7 Jan 2009
- Posts
- 6,640
Interesting,Ive subbed to this thread 
Electrician has been and didn't say it would be a problem...
Soldato
Did they say it wouldn't be?
He didn't specifically say it wouldn't be either 
However, I don't reckon it will be much more than 5KW...
However, I don't reckon it will be much more than 5KW...
Soldato
If its in a cellar then I wouldnt of thought that a chopper would see it as the heat would have to propogate through the house..
I cant imagine how warm it'll get though, I have 2 machines with a 270x in and between those two I havent had to turn on the heating in my bat cave even though its been literally freezing outside over christmas and this year..
I cant imagine how warm it'll get though, I have 2 machines with a 270x in and between those two I havent had to turn on the heating in my bat cave even though its been literally freezing outside over christmas and this year..
Associate
They don't know electricity usage by house unless OP has a smart meter. Which is why electric bills are often so far out!
The power to the house won't be a problem. Houses have at least a 60A incomer, usually nearer 100A.
20 of R9 280X at 250W TDP = 5000W
4 of R9 290 at 275W TDP = 1100W
So 1000W per 280X system, 1100W on the 290 system.
Allowing for losses in the PSU (antec don't publish an efficiency curve) we'll go with 85% at that power level.
1000W/0.85=1175W
1100W/0.85=1295W
So input power is 1175*5=5875 + 1295 = 7170W total input.
7170W/240V = 29.875A
Given that most domestic sparks will install sockets on a 32A ring, you'll be OK. Just. Chances are if you tweak and underclock then it will run a bit lower. As long as the install is good, and you space the rigs around the ring (no more than one per socket, if you have 6 double sockets going in, put one on each socket.
Just don't switch them all on at once. The inrush probably will trip the breaker!!
Just a thought. Do check your incoming supply. Bear in mind that things like electric showers and Domestic ovens can pull up to 40A, you might want to consider what might happen if you run your rig whilst cooking dinner in the oven and go for a shower. Blowing main incomer fuses is something that can only be rectified by the power board!
The power to the house won't be a problem. Houses have at least a 60A incomer, usually nearer 100A.
20 of R9 280X at 250W TDP = 5000W
4 of R9 290 at 275W TDP = 1100W
So 1000W per 280X system, 1100W on the 290 system.
Allowing for losses in the PSU (antec don't publish an efficiency curve) we'll go with 85% at that power level.
1000W/0.85=1175W
1100W/0.85=1295W
So input power is 1175*5=5875 + 1295 = 7170W total input.
7170W/240V = 29.875A
Given that most domestic sparks will install sockets on a 32A ring, you'll be OK. Just. Chances are if you tweak and underclock then it will run a bit lower. As long as the install is good, and you space the rigs around the ring (no more than one per socket, if you have 6 double sockets going in, put one on each socket.
Just don't switch them all on at once. The inrush probably will trip the breaker!!
Just a thought. Do check your incoming supply. Bear in mind that things like electric showers and Domestic ovens can pull up to 40A, you might want to consider what might happen if you run your rig whilst cooking dinner in the oven and go for a shower. Blowing main incomer fuses is something that can only be rectified by the power board!
Oh my god... I think you have just terrified me.
Anybody want some free GPUs?!
Anybody want some free GPUs?!
Man of Honour
Soldato
Hey....hey...don't give up...
...not until I have access to the Members' Market, anyway...
...not until I have access to the Members' Market, anyway...
All of this basically lol
I calc'd it to be a nudge over 30 amps on the new ring. Consider a "C" curve on the MCB? It's highly unlikely that you'd see a scenario where every rig powers on at the same time (reinstatement after an outage?) but if it did happen and the cooling solution was on the same ringmain you might run into problems I guess?
Associate
Fancy sending a 280x over in exchange for my maths? 
As brad says, a C curve breaker might be necessary if the rigs are ever likely to power on simultaneously. However, some sparkies might not be happy slapping a C type breaker in. Just make sure it's a ring wired in 2.5mm cable at least. Have you decided on a cooling solution?
As brad says, a C curve breaker might be necessary if the rigs are ever likely to power on simultaneously. However, some sparkies might not be happy slapping a C type breaker in. Just make sure it's a ring wired in 2.5mm cable at least. Have you decided on a cooling solution?
Soldato
Still think the best option for cooling so far is to cover the lot in plastic and then stick an AC unit feeding in to it, easier to cool a smaller space than a larger one, as long as you can get the heat out that is..
I'd be looking at surge/ups as well..
I'd be looking at surge/ups as well..
Associate
This time of year a big fan feeding it ambient air from outside would be just as effective, cheaper and lower power.
Soldato
Is this a long term thing? If so then I'd look at putting in floor vents (cellar ceiling) as you'll be able to use some of the heat to warm up your house, reducing heating costs!
No point throwing heat away!
No point throwing heat away!