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Author Topic: Setting up ventilation in room for 4 rigs with 3 6990's per rig  (Read 1726 times)
mackminer
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July 12, 2011, 07:13:17 PM
 #1

Hi,
I will be using the HAF X case and was told by my supplier that the ambient temperature in the room will need to be about 25 celcius. Does that sound correct?

Our average temps during the summer here are between 18 and 20 degrees celcius (64 to 68 farenheit) during the summer. If the temperature outside is any higher than 25 (rare) then I can clock the machines down. The ideal temperature to have the cards at would be 70 degrees with as little fan speed as possible (want those cards to keep going for a long time). The top of the HAF x can take two 200mm fans - it comes with one and I am going to get the second and install if required.

Now my question actually is can the room be too cold?  Average winter temp is 8 celcius (46f). That's a third of the required ambience. Will this air be too cold for my machines to take in or will the fan pumping cool air in have to be adjustable?

Thanks.

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btcbaby
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July 12, 2011, 07:18:03 PM
 #2

46F is perfectly fine if not ideal.  You should be able to run your fans really low with that kind of cooling.

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NetTecture
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July 12, 2011, 08:36:40 PM
 #3

Too expensive case. Aerocool has a cheaper one that is as good, or go for an open frame. With an open frame you can KILL THE SECOND COMPUTER  and run 6 cards on one computer with pci-e extender cables Wink Or run another 6.
cicada
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July 12, 2011, 08:37:29 PM
 #4

I would kill to run my rigs at 46F ambient!

They don't at all like the 95F ambient they're sweating in now.

The colder the better really, the crazy nitrogen overclocker types go sub-zero.  You'll be hard pressed to find too cold.

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Jack of Diamonds
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July 12, 2011, 08:44:36 PM
 #5

Remember, case fans are expendable & durable. Add those, and keep the card fan itself at low speeds.

Sure, the card fan is *ultimately* replaceable, but a RMA could take weeks, and you can't have your 800mhash card (or many of them) down for that long.

Add external cooling as a priority. If some of it dies you can just downclock the cards and go buy new fans. If your card fan dies you're in a world of shit unless you go McGyver & improvise a new one

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July 12, 2011, 09:25:12 PM
 #6

sustained temps below 50F can bring unwanted moisture.  unless of course you live in an arid location.

just something to think about other than the heat issue...

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mackminer
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July 12, 2011, 10:11:57 PM
 #7

sustained temps below 50F can bring unwanted moisture.  unless of course you live in an arid location.

just something to think about other than the heat issue...

'monkey

Thanks for that. I can run talk to my ventilation man about reducing exhaust or intake when it's cooler outside.

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July 12, 2011, 11:59:59 PM
 #8

Mainly get moisture when warm air hits cold parts, in this case its cold air hitting hot parts. I duct a 5000 btu window unit right into my cards and have no problem "other than my electric bill".
mackminer
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July 13, 2011, 02:23:29 PM
 #9

sustained temps below 50F can bring unwanted moisture.  unless of course you live in an arid location.

just something to think about other than the heat issue...

'monkey

The humidity turns into gas at 45 degress celcuis so the heat of the cards (in or around 70) will turn it into gas immediately.


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mackminer
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July 13, 2011, 02:24:08 PM
 #10

Mainly get moisture when warm air hits cold parts, in this case its cold air hitting hot parts. I duct a 5000 btu window unit right into my cards and have no problem "other than my electric bill".

What's a 5000 btu window?

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kloinko1n
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July 14, 2011, 02:29:09 PM
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Mainly get moisture when warm air hits cold parts, in this case its cold air hitting hot parts. I duct a 5000 btu window unit right into my cards and have no problem "other than my electric bill".

What's a 5000 btu window?
I guess it's an aircon.
However I believe that cooling air with an evaporative air cooler is much more energy efficient.
Or a combination if you care for comfort.
nebiki
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July 14, 2011, 02:40:28 PM
 #12

stop posting this, seriously. i'd be dying to get my hands on a 6990. ship 1 to me, i'll let it mine for you for a few months!

18-20°C in summer, you're one lucky man. we've already had a few days at 35°C.

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burningrave101
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July 14, 2011, 04:20:19 PM
 #13

sustained temps below 50F can bring unwanted moisture.  unless of course you live in an arid location.

just something to think about other than the heat issue...

'monkey

Add a dehumidifier to the room to draw out the moisture in the air.
mackminer
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July 14, 2011, 05:51:55 PM
 #14

Mainly get moisture when warm air hits cold parts, in this case its cold air hitting hot parts. I duct a 5000 btu window unit right into my cards and have no problem "other than my electric bill".

What's a 5000 btu window?
I guess it's an aircon.
However I believe that cooling air with an evaporative air cooler is much more energy efficient.
Or a combination if you care for comfort.

I'm not sure about the energy efficient aspect at all - I did consider an air conditioner. My rigs will be pulling around 4.8kwh total. A conditioner would add 3.5kw per hour!  Shocked

EDIT: Maybe after reading there again I've misinterpreted you. I assumed an evaporative air cooler was the same as a conditioner - never heard of them b4.

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mackminer
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July 14, 2011, 05:53:37 PM
 #15

Remember, case fans are expendable & durable. Add those, and keep the card fan itself at low speeds.

Sure, the card fan is *ultimately* replaceable, but a RMA could take weeks, and you can't have your 800mhash card (or many of them) down for that long.

Add external cooling as a priority. If some of it dies you can just downclock the cards and go buy new fans. If your card fan dies you're in a world of shit unless you go McGyver & improvise a new one

There should be a "good post" option available here.

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fitty
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July 15, 2011, 02:45:55 AM
 #16

Mainly get moisture when warm air hits cold parts, in this case its cold air hitting hot parts. I duct a 5000 btu window unit right into my cards and have no problem "other than my electric bill".

What's a 5000 btu window?
I guess it's an aircon.
However I believe that cooling air with an evaporative air cooler is much more energy efficient.
Or a combination if you care for comfort.

I'm not sure about the energy efficient aspect at all - I did consider an air conditioner. My rigs will be pulling around 4.8kwh total. A conditioner would add 3.5kw per hour!  Shocked

EDIT: Maybe after reading there again I've misinterpreted you. I assumed an evaporative air cooler was the same as a conditioner - never heard of them b4.

What about just venting the heat straight outside? Then at least you're not trying to cool the heat that's being produced. I guess air is going to be coming into the house from somewhere with that kind of venting?

If you had all 4 rigs next to a window that had a few beefy exhaust fans I assume that would at least get rid of the heat. Unsure how that would effect the rest of the basement though.
nebiki
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July 15, 2011, 04:09:27 PM
 #17

Mainly get moisture when warm air hits cold parts, in this case its cold air hitting hot parts. I duct a 5000 btu window unit right into my cards and have no problem "other than my electric bill".

What's a 5000 btu window?
I guess it's an aircon.
However I believe that cooling air with an evaporative air cooler is much more energy efficient.
Or a combination if you care for comfort.

I'm not sure about the energy efficient aspect at all - I did consider an air conditioner. My rigs will be pulling around 4.8kwh total. A conditioner would add 3.5kw per hour!  Shocked

EDIT: Maybe after reading there again I've misinterpreted you. I assumed an evaporative air cooler was the same as a conditioner - never heard of them b4.

What about just venting the heat straight outside? Then at least you're not trying to cool the heat that's being produced. I guess air is going to be coming into the house from somewhere with that kind of venting?

If you had all 4 rigs next to a window that had a few beefy exhaust fans I assume that would at least get rid of the heat. Unsure how that would effect the rest of the basement though.

i think that's how it works. get fresh air from outside and blow the hot air outside again. vent holes needed, though.



paint skills! of course the left and right part need to be connected to the outside.

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