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Profile Vipin Palazhi
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Message 1382625 - Posted: 19 Jun 2013, 3:16:40 UTC

I CANNOT understand the fahrenheit scale, so after converting, 83F gives me 28.3 C, which is rather cool in my part of the world. The current temperature here is hovering around 40C or 104F, and we are yet to hit peak summer, which is next month and 52C or 125F is quite common (I have personally measured the highest of 54C or 129F). I have centralized AC in the apartment which runs 24/7 with half the supply air diverted directly over my rigs.

But... each of us have our own unique issues. So hope all goes well over there and see you soon after the summer fades away.
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Message 1382627 - Posted: 19 Jun 2013, 3:49:34 UTC

I no longer have a functioning air conditioning unit. It reached 94°F today. My machines did not go off.

NO EXCUSES!!
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Message 1382630 - Posted: 19 Jun 2013, 4:14:05 UTC

Ug. Walk in room. PC not running. Temp OK. Ug

Walk in room, PC on. Temp Ok. Ug

Walk in room, PC on. Cpu running Boinc. Feel increase in temp. Meh, but don't like. Ug

Walk in room, PC on. Cpu and 2 GPUs(never more than 70C) doing Boinc. Too warm. Yuk. Ug.

Weather Summer or Winter. Too warm. Yuk. Ug.

Ug, PhD

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Message 1382663 - Posted: 19 Jun 2013, 7:37:58 UTC - in response to Message 1382625.  

The current temperature here is hovering around 40C or 104F, and we are yet to hit peak summer, which is next month and 52C or 125F is quite common

What is the relative humidity at the time of those temperatures?
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Profile Paul D Harris
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Message 1382749 - Posted: 19 Jun 2013, 16:45:46 UTC - in response to Message 1382357.  
Last modified: 19 Jun 2013, 16:52:12 UTC

My cruncher consumes about 700 watts or so yet the heat out does not equal the heat from a 700 watt space heater it is considerable less.

How do you know that your "cruncher consumes about 700 watts"
Did you measure it in real time?
It may really consume only 200 watts.

(If your PSU is rated '700 W' this does not mean your computer really "consumes about 700 watts"
The same: if your stereo music system say "total RMS power of 100 W" this does not mean you use that power (Volume to Max) all the time.
)



I used a psu web site that determines what size psu I need. I have a 1000 watt psu. I estimate it to be 700 watts I use. i7 920 cpu, 2 460 cards, 1 ssd, 1 hdd, 1fdd, 2 dvd writers, 1 water cooler and fan, 4 180 led fans, 2 240 led fans, 6 tri channel sticks at 4 gb each for 24 gb memory at 8-8-8- timings, asus p6t mb, 2 usb sticks, wireless (usb) keyboard and mouse, usb printer, led 27 in monitor, battery backup, I thinks that equals about 700 watts. I used to use 750 watt psu but they would not hold up so I went with 1000 watts psu. I crunch 24/7.
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Message 1382751 - Posted: 19 Jun 2013, 16:52:04 UTC - in response to Message 1382749.  

My cruncher consumes about 700 watts or so yet the heat out does not equal the heat from a 700 watt space heater it is considerable less.

How do you know that your "cruncher consumes about 700 watts"
Did you measure it in real time?
It may really consume only 200 watts.

(If your PSU is rated '700 W' this does not mean your computer really "consumes about 700 watts"
The same: if your stereo music system say "total RMS power of 100 W" this does not mean you use that power (Volume to Max) all the time.
)



I used a psu web site that determines what size psu I need. I have a 1000 watt psu. I estimate it to be 700 watts I use. i7 920 cpu, 2 460 cards, 1 ssd, 1 hdd, 1fdd, 2 dvd writers, 1 water cooler and fan, 4 180 led fans, 2 240 led fans, 6 tri channel sticks at 4 gb each for 24 gb memory at 8-8-8- timings, asus p6t mb, 2 usb sticks, usb keyboard and mouse, usb printer, led 27 in monitor, battery backup, I thinks that equals about 700 watts. I used to use 750 watt psu but they would not hold up so I went with 1000 watts psu


The only way you will know for sure is to invest about $20.00 in a Kill a Watt meter.

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Message 1382752 - Posted: 19 Jun 2013, 16:56:23 UTC - in response to Message 1382625.  

I CANNOT understand the fahrenheit scale...


Nor should you, it's a ridiculous scale. 0°F is based on the freezing point of a brine solution that exists only in a laboratory. I'm not sure what the upper end was based on, but I think it had something to do with setting the human body temperature at 96° for whatever reason (it's since been readjusted). Unfortunately it's still easier for me to think in terms of Fahrenheit because I grew up with it, and all the weather reports here are still in °F.
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Message 1382755 - Posted: 19 Jun 2013, 17:00:14 UTC

Facebook Opens Arctic Circle Data Center explains it all:

Want to build a massive data center but don’t want to pay the environmental costs of cooling your super-heated servers? Head to the Arctic Circle. That’s what Facebook is doing with its new data center in Luleå, Sweden, where temperatures have been known to get as low as -41.8 degrees Fahrenheit.

Facebook says they will use the freezing air to cool the thousands of servers within the building while harnessing any excess heat to keep the offices themselves warm. The company claims that the power usage efficiency at the facility is averaging 1.07 on the power usage effectiveness score, lower and greener than Google, which runs between 1.08 and 2.12.

In addition to the facility’s green cooling method, Facebook claims that all the equipment is powered by locally generated hydroelectric power. They have also praised the local community, saying: "Since we first announced our plans to come here, the local community has been amazingly supportive."


Too bad it's for something as stupid as Facebook... ;-)
Jord

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Profile Paul D Harris
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Message 1382756 - Posted: 19 Jun 2013, 17:02:22 UTC - in response to Message 1382627.  

I no longer have a functioning air conditioning unit. It reached 94°F today. My machines did not go off.

NO EXCUSES!!

My ac went out for 3 weeks and the temps inside went up to if not higher at 106 did not slow down my cruncher.
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Profile Paul D Harris
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Message 1382757 - Posted: 19 Jun 2013, 17:05:00 UTC - in response to Message 1382752.  
Last modified: 19 Jun 2013, 17:10:01 UTC

I CANNOT understand the fahrenheit scale...


Nor should you, it's a ridiculous scale. 0°F is based on the freezing point of a brine solution that exists only in a laboratory. I'm not sure what the upper end was based on, but I think it had something to do with setting the human body temperature at 96° for whatever reason (it's since been readjusted). Unfortunately it's still easier for me to think in terms of Fahrenheit because I grew up with it, and all the weather reports here are still in °F.

212 is the boiling point of water and that is not the upper limit we use it because it is the standard in the us. Standing water will freeze at 32. All of this is at sea level.
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Message 1382764 - Posted: 19 Jun 2013, 17:17:57 UTC

Or speaking in a more common language...

< 90 F - Safe for crunching
> 90 F - Warm - Keep an eye at the temps.
>100 F - Hot - Slow down you cruncher
>110 F - Hot as Hell - Better stop crunching
>120 F - You are close of an ET star and is not safe for humans or hosts.



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Message 1382767 - Posted: 19 Jun 2013, 17:27:00 UTC

By upper end I mean the boiling point of pure water at standard pressure. I'm a physicist, I know how the scale works. I'm saying it's a screwy system with bizarre reference points, and it's pointless to continue using archaic units as a standard when the entire planet has moved on.
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Profile Paul D Harris
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Message 1382771 - Posted: 19 Jun 2013, 17:41:15 UTC - in response to Message 1382767.  

In the 70's the us was going metric we even had metric signs on the interstate but it never went through I think too much cost involved. I worked in a medical lab when I was in the USAF we used metrics there even in the military.
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Message 1382773 - Posted: 19 Jun 2013, 17:44:31 UTC - in response to Message 1382764.  

Or speaking in a more common language...

< 90 F - Safe for crunching
> 90 F - Warm - Keep an eye at the temps.
>100 F - Hot - Slow down you cruncher
>110 F - Hot as Hell - Better stop crunching
>120 F - You are close of an ET star and is not safe for humans or hosts.



Those temps should be in c not f
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Message 1382776 - Posted: 19 Jun 2013, 17:51:48 UTC
Last modified: 19 Jun 2013, 17:52:04 UTC

I remember a short story by Ernest Hemingway where a young American boy raised in France has his temperature measured by an American doctor using the Fahrenheit scale and is convinced he is going to die, until his father reassures him.
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Profile Vipin Palazhi
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Message 1382918 - Posted: 20 Jun 2013, 3:27:53 UTC - in response to Message 1382663.  

The current temperature here is hovering around 40C or 104F, and we are yet to hit peak summer, which is next month and 52C or 125F is quite common

What is the relative humidity at the time of those temperatures?

Right now it hovers between 60 to 80%. We get 95% to absolute humidity during the peak. 5 minutes outside and its like taking a sweat shower. Not uncommon to see people, especially women, go down like deflated balloons due to dehydration.
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Message 1382928 - Posted: 20 Jun 2013, 4:29:24 UTC - in response to Message 1382918.  

The current temperature here is hovering around 40C or 104F, and we are yet to hit peak summer, which is next month and 52C or 125F is quite common

What is the relative humidity at the time of those temperatures?

Right now it hovers between 60 to 80%. We get 95% to absolute humidity during the peak.

That's a shame, otherwise an evaporative cooler would be a very effictive option.

Grant
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Message 1382969 - Posted: 20 Jun 2013, 8:58:29 UTC - in response to Message 1382773.  

Or speaking in a more common language...

< 90 F - Safe for crunching
> 90 F - Warm - Keep an eye at the temps.
>100 F - Hot - Slow down you cruncher
>110 F - Hot as Hell - Better stop crunching
>120 F - You are close of an ET star and is not safe for humans or hosts.



Those temps should be in c not f


I believe he's talking about ambient air temperature.

120F ambient air temp is unsafe for crunching.

At 120C ambient air temperature, number crunching ceases. Well, it ceases to be important.
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Message 1382970 - Posted: 20 Jun 2013, 9:00:11 UTC - in response to Message 1382771.  

In the 70's the us was going metric we even had metric signs on the interstate but it never went through I think too much cost involved.


In the 1970s it was important to think in grams and kilos.
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