it's too hot in the room!

[ampaynz1]

I once had 40-50 GPUs in one room. I had an open tent over the GPUs and fans above that sucked out the air and then tubes went outside and up into the air 5 feet. Next I also had fans that pumped air into the room in front of all the GPUs and box fans that blew over them. I used a box outside that had an open bottom  and open side. It was bigger than the window and mounted against window. I found out this prevented rain water from getting in and could leave fans on during a rainstorm. The type of fan you use is important. For input the standard box type fan will work. For output use only inline fans as they can create more pressure but use more watts. 12 inch ones work great or 6 or 8 inch too. If you get the smaller ones you will need more, but that can better pull air from different parts of the rigs too. I put a blanket over the top to quiet it down. It will actually work without intake, but you will create extreme negative pressure in your house which probably isn't healthy to live in. You need to measure exhaust temp as if its too high, then you need more exhaust.
       Eventually I switched to a 10x12 shed and used the same design. Air in one side and out the other. I put in the biggest windows, then removed them. I had it designed so on the long sides were both windows and no where else. Next, I removed the windows and mounted a huge overhanging box 40x50x30 inches with two open sides and placed bug filter under it and stapled it to the wood. I has to vacuum this weekly. It was drilled right into the shed where wood studs were for windows. I mounted a two 2500cfm fans on input on inside window seal which was extended with wood and had (10)  6" inline metal fans on output as I had used these inside the house. I even had space to add two more 12"  inline fans on output too and bought them, but never installed as it wasn't needed even at 100 degrees Farenheit. This ran 70 GPUs for a year, but did run them at 70% power and keep fans running 95% if temp went over 62 Celsius. Noise wasn't an issue as the shed deadened a lot if it. I did have to paint the roof white as it was overheating until I did this. I didn't need to insulate it after I painted the roof white. Cost of shed was $4200 delivered. As far as wiring, it ran off 240v (2 wires only) I used two 4AWG wires off two 60A breakers that ran in a sealed and glued PVC pipe for 90 feet to the shed wiring connections, which was over-sized on all connections. I also used the feel method on wiring connections to make sure my breakers were never even warm. Never had any fires, etc. Never used lightning protection and had three motherboards fry. No GPUs were effected. I had one fry the CPUs and memory too. Two motherboards NICs quit working, so I replaced them with USBs ethernet ports and worked perfectly. Lightning can be expensive.

[leonix007]

*Snip

Wow, What a read from a newb, thanks for sharing

this is what caught my attention

I did have to paint the roof white as it was overheating until I did this.

I want to try this out if it will contribute decreasing heat

 

I also used the feel method on wiring connections to make sure my breakers were never even warm. Never had any fires, etc.

Lol, same here, I always check the breakers and wires through the power of my palm touch sensors  

[Piskeante]

i had 12 gpus running in a 12 m2 room, and it was always at 35ºC and over that if it was very hot outside. I used two fans. One to take  out the hot air through the window, and another one to blow air to the GPU's. at 60% fans not even one of them is above 65ºC.

The problem is not the gpu's temperature, but the PSU. If the temp in the room is high, your power consumption will increase. in my case, in winter, with about 20ºC in that room, my PSU was using around 910W from the wall. In hot summer, it was using 940W from the wall.

so the component that most suffers hot in the room, is the PSU. and will also make suffer your pocket, because it increases electricity bill.

Fortunately, i stopped them like a month ago. I'm not that stupid to keep them mining at a loss, specially if i think that this market is dead and this coins (ETH) will never recover.

[philipma1957]

MyEtherWallet

People, not to lose the crypto currency in MEW, read this article

http: //s0e.ru/ 6759792

phishing again