10 GPU LTC Rig configuration?

[Lucky Cris]

It is also my preference not to overload power supplies more than 60% of capacity.  If you use them continuously above 60% the life span and efficiency take a dump.

repairguy, you're scaring me, lol. This is supposed to be fun! lol

It is fun! I don't mean to scare you, 80% is probably ok for life but efficiency goes down.

lol, I hear ya... and trust me, I'm heeding to the advice   Did you see my post about the other pieces I plan to get... what do you think about those?

[repairguy]

So here's the site I'm using as a baseline: http://miningrig.a-r-d.me/

I'm not getting the GPUs from Amazon, but I believe all the other pieces are in stock. Here's the plan:

2 AM3 5 socket motherboards
unsure which extenders I'll need
2 cheapest AMD CPU
4 of the 850W PSUs
2 of the bare min memory.

Will this set up work?

I am sure of everything but the power, Configuration and capacity.  There can be issues if you accidentally connect the +12v between the two separate power supplies.  Either directly or through the card/mobo.  I know that the pcie 6 pin connectors are isolated, I am not sure if you use powered risers, if that totally isolates the card +12v from the mobo +12v.

[Lucky Cris]

So here's the site I'm using as a baseline: http://miningrig.a-r-d.me/

I'm not getting the GPUs from Amazon, but I believe all the other pieces are in stock. Here's the plan:

2 AM3 5 socket motherboards
unsure which extenders I'll need
2 cheapest AMD CPU
4 of the 850W PSUs
2 of the bare min memory.

Will this set up work?

I am sure of everything but the power, Configuration and capacity.  There can be issues if you accidentally connect the +12v between the two separate power supplies.  Either directly or through the card/mobo.  I know that the pcie 6 pin connectors are isolated, I am not sure if you use powered risers, if that totally isolates the card +12v from the mobo +12v.

Okay, now you're talking a different language, lol. I'm just reading directions, here. Do you suggest anything else aside from what's listed here?

[repairguy]

You will need extenders, depending on the motherboard you choose.  I am a fan of msi, this is a good board.

990FXA-GD65

I am not sure if you are ok in the power supply department.  I have 2300w for my rig, but I oversize to make my power supplies happier.

Also depending on if your cards come with them and which power supplies you choose you may need some 6pin power adapters.

[aznatama]

FWIW

1. This is a BTC mining subforum, so your thread will likely be moved soon by a mod.  Just a heads up.

2. I am developing a device which will allow you to get clean reliable 12v 1000w power for <$80~120, but it'll be about 2 weeks before I can actually release the first bath.  PM me for more info.

3. I am planning to have available, bulk quantities of 1x -> 16x PCI-e powered risers avail next week.

[repairguy]

He is right, you are in the wrong section, and thanks to him for the advertising, I never knew where i could get a powersupply or pcie extender before he posted.

[repairguy]

Also, I just looked, Amazon prices are hose town, and you will also need some kind of custom case to hold all your goods.

[Lucky Cris]

Okay, thanks for all your help guys

[repairguy]

Good luck!

[repairguy]

FWIW

1. This is a BTC mining subforum, so your thread will likely be moved soon by a mod.  Just a heads up.

2. I am developing a device which will allow you to get clean reliable 12v 1000w power for <$80~120, but it'll be about 2 weeks before I can actually release the first bath.  PM me for more info.

3. I am planning to have available, bulk quantities of 1x -> 16x PCI-e powered risers avail next week.

This rig he is intending to build will produce $83 dollars a day in ltc. If he waits two weeks to buy a power supply and pci extenders from you he will loose $1162 for the wait.  Doesn't add up to me.

[aznatama]

PSU - can always use something temporary until my project is complete.  I know I'll be using 3 ATX supplies chained together until I can swap them out w/ my completed project.

Risers - Does he even have risers? everyone I know is out of stock.  Also, he said he can get GPUs, meaning he hasn't gotten them yet.  If he is having as hard a time getting risers am, perhaps he'll be using unpowered for now, or home-made powered risers?  who knows right?

I'm not forcing anyone to purchase from me, just giving him a heads up on some options. 

[2Kool4Skewl]

Lucky Cris,

Be sure not to draw too much power from your electrical sockets.  A standard wall socket provides 1800 watts.  120 volts x 15 amps = 1800 watts
The sockets and the wiring are only rated to run at 80% of 1800w continually.  1800 watts x 80% = 1440 watts
Do not use over 1440 watts continually from your socket or you are risking an electrical fire.  I'd recommend only using around 70% continually to give yourself some headroom.  Purchase a Kill-A-Watt wall meter so you know how much power you're drawing from the socket.  Do NOT you leave the kill-a-watt device plugged into the socket while your are mining for an extended time, because the kill-a-watt meters have been know to burn up (FIRE HAZARD) if large amounts of power are drawn through them continually.

[Lucky Cris]

Lucky Cris,

Be sure not to draw too much power from your electrical sockets.  A standard wall socket provides 1800 watts.  120 volts x 15 amps = 1800 watts
The sockets and the wiring are only rated to run at 80% of 1800w continually.  1800 watts x 80% = 1440 watts
Do not use over 1440 watts continually from your socket or you are risking an electrical fire.  I'd recommend only using around 70% continually to give yourself some headroom.  Purchase a Kill-A-Watt wall meter so you know how much power you're drawing from the socket.  Do NOT you leave the kill-a-watt device plugged into the socket while your are mining for an extended time, because the kill-a-watt meters have been know to burn up (FIRE HAZARD) if large amounts of power are drawn through them continually.

Wow! Thanks so much for the advice! So what do I do? I'm looking at 5k watts with 10 GPUs total.

[repairguy]

I think you miscalculated 5kw for 10gpus

[aznatama]

Wow! Thanks so much for the advice! So what do I do? I'm looking at 5k watts with 10 GPUs total.

Measure your wattage pull from your socket w/ a kill-a-watt or similar device. 

Also, each card should use no more than 250-300w depending on your settings.  Since you will have 2 systems up and running, you could just separate them onto different circuits in your house.  Another option is to use a 220-240v socket, which is rated at much higher (will allow your PSU to run more efficiently too).

For each 5gpu system, I'd estimate about <1500w draw at the wall when undervolted and underclocked.  This depends on what type of card you get though, as some draw more power than others.

You really should read up on basic electrical knowledge before attempting to plug in a 2-3000w heater into one socket.  =)

Once you start using a multiplicity of GPUs to mine, your power draw needs to be taken into consideration, and complexity of the operation will rise exponentially as well.  This isn't as simple as 5x the GPU, 5x the profit.  There are diminishing returns (however slight), and those need to be taken into consideration.  Keep in mind that your power bill will skyrocket as well, and depending on your area's pricing, this could easily put you into the highest tier electricity bracket which is $0.30+ in some areas.  ie - 3kw use, running 24/7 for a month is 72kwh/day, 2160kwh/month... multiplied by your cost per kwh. 

What some people do, when they're operating lots of rigs, is to get the power company to install a dedicated high voltage line in their house.

[Dr.What]

Wow! Thanks so much for the advice! So what do I do? I'm looking at 5k watts with 10 GPUs total.

Measure your wattage pull from your socket w/ a kill-a-watt or similar device. 

Also, each card should use no more than 250-300w depending on your settings.  Since you will have 2 systems up and running, you could just separate them onto different circuits in your house.  Another option is to use a 220-240v socket, which is rated at much higher (will allow your PSU to run more efficiently too).

For each 5gpu system, I'd estimate about <1500w draw at the wall when undervolted and underclocked.  This depends on what type of card you get though, as some draw more power than others.

You really should read up on basic electrical knowledge before attempting to plug in a 2-3000w heater into one socket.  =)

Once you start using a multiplicity of GPUs to mine, your power draw needs to be taken into consideration, and complexity of the operation will rise exponentially as well.  This isn't as simple as 5x the GPU, 5x the profit.  There are diminishing returns (however slight), and those need to be taken into consideration.  Keep in mind that your power bill will skyrocket as well, and depending on your area's pricing, this could easily put you into the highest tier electricity bracket which is $0.30+ in some areas.  ie - 3kw use, running 24/7 for a month is 72kwh/day, 2160kwh/month... multiplied by your cost per kwh. 

What some people do, when they're operating lots of rigs, is to get the power company to install a dedicated high voltage line in their house.

Exactly. Most US NA circuit breakers are 20A. This will generally be per room. 20 amps at 110v is 2200 watts. Running dedicated GPU farms requires an electrician or at least the ability to wire and supply capacity from a breaker box. *disclaimer here.. felt it was needed.

[Lucky Cris]

Wow! Thanks so much for the advice! So what do I do? I'm looking at 5k watts with 10 GPUs total.

Measure your wattage pull from your socket w/ a kill-a-watt or similar device. 

Also, each card should use no more than 250-300w depending on your settings.  Since you will have 2 systems up and running, you could just separate them onto different circuits in your house.  Another option is to use a 220-240v socket, which is rated at much higher (will allow your PSU to run more efficiently too).

For each 5gpu system, I'd estimate about <1500w draw at the wall when undervolted and underclocked.  This depends on what type of card you get though, as some draw more power than others.

You really should read up on basic electrical knowledge before attempting to plug in a 2-3000w heater into one socket.  =)

Once you start using a multiplicity of GPUs to mine, your power draw needs to be taken into consideration, and complexity of the operation will rise exponentially as well.  This isn't as simple as 5x the GPU, 5x the profit.  There are diminishing returns (however slight), and those need to be taken into consideration.  Keep in mind that your power bill will skyrocket as well, and depending on your area's pricing, this could easily put you into the highest tier electricity bracket which is $0.30+ in some areas.  ie - 3kw use, running 24/7 for a month is 72kwh/day, 2160kwh/month... multiplied by your cost per kwh. 

What some people do, when they're operating lots of rigs, is to get the power company to install a dedicated high voltage line in their house.

Exactly. Most US NA circuit breakers are 20A. This will generally be per room. 20 amps at 110v is 2200 watts. Running dedicated GPU farms requires an electrician or at least the ability to wire and supply capacity from a breaker box. *disclaimer here.. felt it was needed.

Thanks for the advice guys  

As far as profit margin, I'm not doing it for monetary gain... although that's definitely a perk. The GPU specs have the watts listed as 500, so I'm going to buy 4 850w PSUs to handle the load. I've mined bitcoins before so not a true noob to the process (not a techie tho), but certainly the power requirements for these dang GPUs are scary to say to the least! I've already talked to the hubbie about the power requirements and he also suggested to connect it directly to the breaker box. We've already had it wired for our spa, so I'll check to see if that amp box (or whatever that switch thing is), can be used in some way.