Topic: Mining server room (cooling development help) - page 7. (Read 22824 times)

I'm not sure what the wattage of your whole setup is but if I understand it correctly, it is 10kW (50 boxes about 200W each). You will not cool it without AC. Even 1kW noticeably heats a room. And you will likely not cool it with ventilation only unless it's cold winter. Specific heat of air is 1.2 kJ/(m3*K) so assuming 10 K difference between incoming and exhausting air from the room, you need to move 10000/1200/10=0.8 m3 of air per second. This is a lot. You need to exchange all the air in the room in less than 1.5 minutes. Normal ventilation is exchanging all the air in 1-2 hours. Not only that but you need to make sure, the air is removed properly from the whole room and there are no hot spots. And you'll still have a room that is at least 10 K warmer than the outside temperature which even if not make throttling of the cards, it will make them degrade quicker.

Get an AC unit that is rated for the heat removal at least equal to the heat produced by the setup. Or start with a smaller installation if you have not enough knowledge.

heat is the only issue and your right i don't know much about it the rest of the development is under control

i wouldn't ask if i didn't know

you actually think someone with 3*16=48 pcs with say 3x 5850 each will cause a huge diff increase? dont be so naive, thats only about 46gh.

i would say if that is the depth of knowledge you have on the issue, dont invest in an installation of that size. the heat of each card is precisely defined and possible to even calculate quite accurately, going with the tdp seems to be a good rule of tumb and leave some buffer.
not knowing about tdp and thinking that heat output in watt is in any way related to the environmental temperature does suggest you should do some more reading rather than building your private datacenter.
you should not confuse heat output per card with the cards ability to stay within its thermal envelope inside your projected building, these are two different issues.

You are right i will increase the difficulty but the difficulty will continue to increase regardless if its me or say 40 other users really doesn't matter if it is me or not the end result is a rise

That's not how Capitalism works.

I like all them GPUs, but you will increase the diff a lot dude. Think about the other users.

Images included this is a scale model of the room in development we are currently waiting on a 200 amp drop to the location to be able to feed this beast but other then that hardware is trickling in from various sources for reference sakes lets assume all gpu's are 5850's light grey are psu's black HDD's and 5th rack down light blackish is switch 1 window to room 1 door units are staggered so there is more chance of air flow 5850 are front and rear exhaust what we need to know is this

should we opt air conditioning if so how should it be routed or should we opt air exchange ?

we are leaning to air exchange as it would be simpler but we need to know how much air should be displaced and how it should be routed ?

there is about 810 ft3 in this room

we have no idea the actual heat that the cards are putting out because it is dependent on alot of factors such as the room air temp and such .. but open air with fan running 100% we sit at about 62 degrees C assuming the outside air is about 17 C so given the max temp of ~37C  and a min in the winter of -30C

roughly how much air should we be moving im sure i could setup a thermostat to regulate the fans on and off but still would be nice to know how many cfm the inline fans should move to cool the room at a max temp of 37C outside


Images oversized sorry lol and detail is lacking just so you can get a panned out view if anyone uses maya and wants the maya file let me know