Topic: Mining server room (cooling development help) - page 4. (Read 22824 times)

@warweed - your projected 150 or 200 amps is not going to be enough. 

I am running an almost identical set up, with roughly one of your racks and am drawing about 150 amps.  I have 3- and 4-card boards with sempron 140's and those same sapphire xtreme 5850's.  The 3-card boards are each pulling 5.5 amps (measured with a kill-a-watt at the outlet) and the 4-card boards are pulling almost 7 amps (at full load with slight oc of course).  Doing the math... you're looking to run 48 boards @5.5 amps each for a total of 264 amps.  Better make that 300 amp service if you want to run a bunch of fans or a/c units in that room.

I'm running my setup in an office which already has a/c and it can't keep up.  I've put a large window fan in to exhaust the hot air and another large intake fan to bring cool air in from the rest of the building.  The heat from those cards is ejected laterally, so instead of having fans blow in the usual front-to-back orientation like in a computer case, I have box fans blowing the length of the shelves, to move the heat toward the window.

I also found that its cheaper and slightly lower power to go with USB stick drives instead of regular hd's.  An ubuntu server install plus everything you need fits on a 4 GB stick.

Good luck, I hope electricity is free there!

I'm not denying that it is a shit show I'm simply not it is a on the fly idea but it is a shit show that I wouldn't even attempt if I hadn't even at least previously covered my hardware costs I have already paid off my 13 5870s mining since difficulty was at 72k and paid of what I'm investing now the rest is gravy and if you want to call my bluff you can look at block explorer I have been steady cashing our to lr 1000 a day for the last 19 days and shall keep doing so

Yup again I am Canadian I am aware of the busts made in Canada for suspected grow op operations I also have experience with dealing with the law including successfully sueing I have done my due dillidgance and have made sure to follow all regulations and sure you know what it is a shotty setup but it is a to code setup I'm not running to the forums for help I'm asking for advice qnd suggestions and even previous experiences


My calculated load average is 96 amps at 120 volts plus cooling and lastly

Those machines I got cheap were all inspected prior to purchase they all have procs psu's and ram 80gig Sata drives and a single gig of ram each the pcu cooler had to be modded to accept the gpu as it was in the way and the case top would not clear hence open air

pwnyboy can you at least read before sticking your foot in your mouth

Would be a nice trick for "The Fed's" to bag a CANADIAN

wanna try and screw this guy? upvote. http://www.reddit.com/r/reddit.com/comments/hjylq/got_an_ati_video_card_start_generating_bitcoins/

It really depends on your location (latitude). If you are north of 40N, highest ambient temperature is probably 40C in the summer, CPU & GPUs can work up to 90~100C,  you don't even need a room, a true open air operation will be the best:
http://t1.gstatic.com/images?q=tbn:ANd9GcTLX5-9eUfY97PMipkLQXn0MgXyn8WHQ9MJUpFnGYizpgXSIroVCA
Alaska anyone?

Be careful with those pallets.

My employer would auction off as they fell of maintenance, over a thousand Dell Optiplex machines every year.

It was common practice for the technicians to rip out the RAM and sometimes CPUs prior to sending them off. Old DDR and DDR2 can be very expensive to procure these days.

You're coming to a forum to ask for advice on how to cool this room of yours.  A forum!  Not to an engineer, not even to an HVAC tech, but a forum, where the overwhelming majority of the users are not HVAC design engineers.  At best, you might find someone familiar with the laws of physics (see above) or someone who's actually designed and built datacenters for a living (I happen to fall into that category).


I've seen this time and again in the web hosting business.  The people who run to forums for advice _first_ are the ones who _do not_ have a budget to talk to an engineer, and _are indeed_ over their head.


You have yet to define what "work just fine" means exactly.  If that means 5 degrees (Celsius) above outside air temp, not likely.  If that means 20 degrees above outside air temp, you might have a shot.  


That's ridiculous.  All you've done is put yourself on their radar.  Please do report back to us how your project goes, and at what point the feds do show up.

We have a source for complete single slot pcie machines in the amount of 50 machines a skid at a cost of 20 each then add 133 plus tax only on 133 of 5% for the gpu add psu that powers the gpu and board sufficiently for 30 that's 9600 just for the machines that's cheaper by far then what 90% of you even pay for a 5870

See bobR it's not who you know but who knows you ! That's how you get good deals buy in volume with a corporate account

Don't under estimate the cost and moving factor of volume purchases of end of life hardware

He does make a valid point thou about that actually but I already have the equipment already around for a CO2 argon fire suppression system

How cheap is ASSHOLE insurance
Just what that I stated is a fire hazard
Troll Troll go away
play your games another way

First off my cost is no were near 60g lol try more like 12g haha like I said this is a cheap setup check YouTube.com/warweed for what we were running before that's all brig consolidated into one room and tripled then add cooling ontop of that


And like I said it's epcor (power company) that flags a house for excessive usage they have already been contacted same with local law if the proceed we will sue the
 And don't worrie we will recover our costs easily in hardware and when power starts to be to mch in relation to payout we shall lease out the gpu cluster to university researchers or something to that effect

Don't forget buying a large fire insurance, from a company that has no swap trade with AIG.
You'll start a fire in no time.

He could possibly break even in a few months. Then he's just wasted the opportunity cost of his time.

Yeah i missed that one, no worries with that size of a setup.  I am curious, what do you estimate your earnings to be in 20 days when difficulty is 1.2M or in 30 days when it is 2M?

cuting some 4x8 sheet of composite board with some u channel guides top & bottom
would make some cheep side panels-doors
six 20' box fans should give plenty of air flow even at low speed
cheep furnace filters in some u channel for filtering the fan intake side for dust

Whatever your plan is, I hope your top priority is to get as many of these machines up and running within your current cooling/power limits as you possible can.

Especially with the next difficulty jump at over 70% (!!)

also consider buying more expensive[in terms of Mh/s per investments and PCi-e slots waste]cards w/o active coolers/fans. this time its something like 6870 or below.

Maybe you should reread http://forum.bitcoin.org/index.php?topic=9621.msg139579#msg139579

Gee if using 100 amps of power gets you a visit from the authorities
they are visiting every small business & factory in the country
Now back to REALITY

I don't have to know anything about you knowing you are spending $60,000 on a mining setup that may never pay for itself, given that for you to break even bitcoin is going to have to increase in value to $50 or $100, you should simply be buying bitcoins.

Do you think people raided for drugs are using illegal power drops connected to the grid?  They are not, having a legal drop means nothing, although contacting them is a great idea I wouldn't count getting raided out.  Law enforcement is notorious for not communicating internally.


The OP pic shows 48 machines with what I was assuming is 3 GPUs each.