Summer is coming

Message boards : Number crunching : Summer is coming

Author	Message
Damaraland Send message Joined: 7 Nov 09 Posts: 152 Credit: 16,181,924 RAC: 0 Level Scientific publications	Message 23879 - Posted: 10 Mar 2012 \| 17:32:07 UTC Last modified: 10 Mar 2012 \| 17:39:59 UTC
	Well, seems summer is coming soon this year. We are near 20ºC... Spain is like this! I was thinking about how hot we are going to get in 1 or 2 months. The options I have are: - Sutting down >30ºC. It's not weird that I get 35º-40º (inside temperature) in July and August. - Put some water coolers. I can handy-made a system to take hot outside... It can take me a lot of time and still see many problems. - Put a row of some 220V air fans something like this. I wonder if blowing 30ºC air would cool enought the system or temp will be to the limit. - forget about AC, I can afford it, but for the cost I prefer to make a direct donation to the project. Maybe someone faced the problem before and can advice me. ____________ HOW TO - Full installation Ubuntu 11.10
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skgiven Volunteer moderator Volunteer tester Send message Joined: 23 Apr 09 Posts: 3968 Credit: 1,995,359,260 RAC: 0 Level Scientific publications	Message 23880 - Posted: 10 Mar 2012 \| 19:54:08 UTC - in response to Message 23879.
	At 35º and above the generation of more heat from crunching would be counter productive and further reduce your comfort. I think you should definitely stop crunching well before ambient temps reached 40ºC, even if you have water cooling. Around 25ºC is fine, but by the time you reach 30ºC you should be considering serious fan systems, water cooling and even under-clocking/volting (GPU and CPU). A good fan cooling setup could still be effective up to around 35º, but a high end GPU with a single exhaust fan in a closed system is likely to cause problems. Maybe you could use Boinc to control the time you crunch. ____________ FAQ's HOW TO: - Opt out of Beta Tests - Ask for Help
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Damaraland Send message Joined: 7 Nov 09 Posts: 152 Credit: 16,181,924 RAC: 0 Level Scientific publications	Message 23882 - Posted: 10 Mar 2012 \| 20:38:14 UTC - in response to Message 23880.
	At 35º and above the generation of more heat from crunching would be counter productive and further reduce your comfort. This is why AC was invented! ;) I don't expect to be in the same room as the computer. I know about confort... becouse some nights during summer it's me who wishes I was watercooled, sometime I even sleep with AC knowing is not very healthy. A good fan cooling setup could still be effective up to around 35º This is really what I was actually thinking. But the question is: What's a good fan cooling setup? This? Or maybe a 220V fan to blow air in the case. Maybe you could use Boinc to control the time you crunch. As far as I know there's nothing that controls crunching versus temperature. Just an overheat that turns off the computer. ____________ HOW TO - Full installation Ubuntu 11.10
	ID: 23882 \| Rating: 0 \| rate: / Reply Quote

skgiven Volunteer moderator Volunteer tester Send message Joined: 23 Apr 09 Posts: 3968 Credit: 1,995,359,260 RAC: 0 Level Scientific publications	Message 23884 - Posted: 10 Mar 2012 \| 21:00:55 UTC - in response to Message 23882.
	A dual fan should suffice with an open case (sides off). Better would be with air filters on the sides and front to prevent dust build up. Your link is for a GTX200 series fan, but there are similar for the GTX500 series. I have often wondered about using a desk fan and just aiming it into the case. I would be surprised if it didn't work very well, though you might have to adjust the angle to get best performance. You are right about Boinc not being able to crunch according to temperatures, but the sun is fairly predictable ;P I would reduce the shaders (cuda cores) clock by 10% when the temps increase to ~30 or 35ºC and increase the fan control profile so that it's more pro-active. A while back I suggested to the Boinc developers, that they add such tools (temp monitor for CPU, GPU, system, hdd, a defragmenter...) to make Boinc more useful and controllable. Maybe some year... ____________ FAQ's HOW TO: - Opt out of Beta Tests - Ask for Help
	ID: 23884 \| Rating: 0 \| rate: / Reply Quote

MarkJ Volunteer moderator Volunteer tester Send message Joined: 24 Dec 08 Posts: 738 Credit: 200,909,904 RAC: 0 Level Scientific publications	Message 23887 - Posted: 11 Mar 2012 \| 0:12:33 UTC Last modified: 11 Mar 2012 \| 0:13:58 UTC
	We're in summer down here in Sydney, Australia Computer room regularly gets above 30 degrees C. I tend to crunch overnight and early morning. By 10am its too hot. I have a couple of room fans to help, but really there is only so much they can do, at which point your options are to start using air conditioning (rather expensive to run) or cut back the processing. You can always use Tthrottle to cut back crunching if the temps get too high. Works for both CPU and GPU. ____________ BOINC blog
	ID: 23887 \| Rating: 0 \| rate: / Reply Quote

Zydor Send message Joined: 8 Feb 09 Posts: 252 Credit: 1,309,451 RAC: 0 Level Scientific publications	Message 23888 - Posted: 11 Mar 2012 \| 2:01:52 UTC Last modified: 11 Mar 2012 \| 2:02:28 UTC
	This is really what I was actually thinking. But the question is: What's a good fan cooling setup? This? Or maybe a 220V fan to blow air in the case. I replaced all my case fans with pressure fans, the resulting improvement in air flow inside the case was stark and exceeded expectations. Whilst direct cooling onto an object (like the fans you linked to) help greatly (both my 5970s have them fitted), what always makes the really significant difference is the principle of good airflow inside the case, pressure fans achieve that admirably. I've found that around 90cfm fans do nicely, and purchased wisely they need not sound like a buzz saw in the same room. Its an added expense for sure at £15-£25 each for quality pressure fans, but the one off expenditure is worth it. My highest ambient is no where near yours (maxing out usually at around 33 to 35 centigrade in the Summer) so the effect will be less for you compared to mine. I also found that fitting a closed loop water cooler for CPU alone is another good investment, Corsair Hydro 80 or 100 would be a good choice, as that channels CPU generate heat directly to the outside of the case, not blown away through the interior of the case. The combination of the CPU cooler and pressure fans has solved any long term worries I have over heat, and is well worth it. Dont go down the pressure road if you dont like any noise, they are not silent - however these days the pressure fans are a different beast to days gone by, much quieter than they once were, and very acceptable noise levels. Overall its a significantly reduced cost compared to a good all encompassing full water block solution on all heat generators, not as good as that of course, but for real world use is very acceptable for the price outlay. Food for thought, doesnt suit everyone, but merits serious thought ..... Regards Zy
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Lagittaja Send message Joined: 1 Nov 10 Posts: 6 Credit: 4,539,537 RAC: 0 Level Scientific publications	Message 23913 - Posted: 12 Mar 2012 \| 9:40:03 UTC
	Or you can always go this route to cool your gpu's :D http://www.overclock.net/t/1203528/official-nvidia-gpu-mod-club-aka-the-mod/0_20 I have macgyver mounted an antec kühler h2o 620 to my gtx470. I couldn't fit my zipties through the heatplate so instead I tightened the pump/block unit straight to the heatplate as you can see, and it actually works lol: http://img12.imageshack.us/img12/2369/img20120110182730.jpg Currently it's a bit poorly mounted with a really bad TIM job since I ran out of MX-4 while doing it.. With 800core and 1.037v my 470 is loading at around 54C with 2x Gentle Typhoon 1850rpm fans at full. Ambient is something like 25C. And this AIO wc loop handles the enormous heat load of my 470 REALLY well. I had it running like 17 DAYS nonstop at those clocks and the temps stayed at 54C. Awesomesauce. If I have enough time during this week I'll remount the kühler, apply enough MX-2 this time (bought 30gram tube so I won't run out till like 2016 lol) and try to come up with more mounting pressure. I expect to get temps below 50C with proper mounting pressure and proper TIM job.
	ID: 23913 \| Rating: 0 \| rate: / Reply Quote

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Message boards : Number crunching : Summer is coming

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Damaraland Send message Joined: 7 Nov 09 Posts: 152 Credit: 16,181,924 RAC: 0 Level Scientific publications	Message 23879 - Posted: 10 Mar 2012 \| 17:32:07 UTC Last modified: 10 Mar 2012 \| 17:39:59 UTC
	Well, seems summer is coming soon this year. We are near 20ºC... Spain is like this! I was thinking about how hot we are going to get in 1 or 2 months. The options I have are: - Sutting down >30ºC. It's not weird that I get 35º-40º (inside temperature) in July and August. - Put some water coolers. I can handy-made a system to take hot outside... It can take me a lot of time and still see many problems. - Put a row of some 220V air fans something like this. I wonder if blowing 30ºC air would cool enought the system or temp will be to the limit. - forget about AC, I can afford it, but for the cost I prefer to make a direct donation to the project. Maybe someone faced the problem before and can advice me. ____________ HOW TO - Full installation Ubuntu 11.10
	ID: 23879 \| Rating: 0 \| rate: / Reply Quote

skgiven Volunteer moderator Volunteer tester Send message Joined: 23 Apr 09 Posts: 3968 Credit: 1,995,359,260 RAC: 0 Level Scientific publications	Message 23880 - Posted: 10 Mar 2012 \| 19:54:08 UTC - in response to Message 23879.
	At 35º and above the generation of more heat from crunching would be counter productive and further reduce your comfort. I think you should definitely stop crunching well before ambient temps reached 40ºC, even if you have water cooling. Around 25ºC is fine, but by the time you reach 30ºC you should be considering serious fan systems, water cooling and even under-clocking/volting (GPU and CPU). A good fan cooling setup could still be effective up to around 35º, but a high end GPU with a single exhaust fan in a closed system is likely to cause problems. Maybe you could use Boinc to control the time you crunch. ____________ FAQ's HOW TO: - Opt out of Beta Tests - Ask for Help
	ID: 23880 \| Rating: 0 \| rate: / Reply Quote

Damaraland Send message Joined: 7 Nov 09 Posts: 152 Credit: 16,181,924 RAC: 0 Level Scientific publications	Message 23882 - Posted: 10 Mar 2012 \| 20:38:14 UTC - in response to Message 23880.
	At 35º and above the generation of more heat from crunching would be counter productive and further reduce your comfort. This is why AC was invented! ;) I don't expect to be in the same room as the computer. I know about confort... becouse some nights during summer it's me who wishes I was watercooled, sometime I even sleep with AC knowing is not very healthy. A good fan cooling setup could still be effective up to around 35º This is really what I was actually thinking. But the question is: What's a good fan cooling setup? This? Or maybe a 220V fan to blow air in the case. Maybe you could use Boinc to control the time you crunch. As far as I know there's nothing that controls crunching versus temperature. Just an overheat that turns off the computer. ____________ HOW TO - Full installation Ubuntu 11.10
	ID: 23882 \| Rating: 0 \| rate: / Reply Quote

skgiven Volunteer moderator Volunteer tester Send message Joined: 23 Apr 09 Posts: 3968 Credit: 1,995,359,260 RAC: 0 Level Scientific publications	Message 23884 - Posted: 10 Mar 2012 \| 21:00:55 UTC - in response to Message 23882.
	A dual fan should suffice with an open case (sides off). Better would be with air filters on the sides and front to prevent dust build up. Your link is for a GTX200 series fan, but there are similar for the GTX500 series. I have often wondered about using a desk fan and just aiming it into the case. I would be surprised if it didn't work very well, though you might have to adjust the angle to get best performance. You are right about Boinc not being able to crunch according to temperatures, but the sun is fairly predictable ;P I would reduce the shaders (cuda cores) clock by 10% when the temps increase to ~30 or 35ºC and increase the fan control profile so that it's more pro-active. A while back I suggested to the Boinc developers, that they add such tools (temp monitor for CPU, GPU, system, hdd, a defragmenter...) to make Boinc more useful and controllable. Maybe some year... ____________ FAQ's HOW TO: - Opt out of Beta Tests - Ask for Help
	ID: 23884 \| Rating: 0 \| rate: / Reply Quote

MarkJ Volunteer moderator Volunteer tester Send message Joined: 24 Dec 08 Posts: 738 Credit: 200,909,904 RAC: 0 Level Scientific publications	Message 23887 - Posted: 11 Mar 2012 \| 0:12:33 UTC Last modified: 11 Mar 2012 \| 0:13:58 UTC
	We're in summer down here in Sydney, Australia Computer room regularly gets above 30 degrees C. I tend to crunch overnight and early morning. By 10am its too hot. I have a couple of room fans to help, but really there is only so much they can do, at which point your options are to start using air conditioning (rather expensive to run) or cut back the processing. You can always use Tthrottle to cut back crunching if the temps get too high. Works for both CPU and GPU. ____________ BOINC blog
	ID: 23887 \| Rating: 0 \| rate: / Reply Quote

Zydor Send message Joined: 8 Feb 09 Posts: 252 Credit: 1,309,451 RAC: 0 Level Scientific publications	Message 23888 - Posted: 11 Mar 2012 \| 2:01:52 UTC Last modified: 11 Mar 2012 \| 2:02:28 UTC
	This is really what I was actually thinking. But the question is: What's a good fan cooling setup? This? Or maybe a 220V fan to blow air in the case. I replaced all my case fans with pressure fans, the resulting improvement in air flow inside the case was stark and exceeded expectations. Whilst direct cooling onto an object (like the fans you linked to) help greatly (both my 5970s have them fitted), what always makes the really significant difference is the principle of good airflow inside the case, pressure fans achieve that admirably. I've found that around 90cfm fans do nicely, and purchased wisely they need not sound like a buzz saw in the same room. Its an added expense for sure at £15-£25 each for quality pressure fans, but the one off expenditure is worth it. My highest ambient is no where near yours (maxing out usually at around 33 to 35 centigrade in the Summer) so the effect will be less for you compared to mine. I also found that fitting a closed loop water cooler for CPU alone is another good investment, Corsair Hydro 80 or 100 would be a good choice, as that channels CPU generate heat directly to the outside of the case, not blown away through the interior of the case. The combination of the CPU cooler and pressure fans has solved any long term worries I have over heat, and is well worth it. Dont go down the pressure road if you dont like any noise, they are not silent - however these days the pressure fans are a different beast to days gone by, much quieter than they once were, and very acceptable noise levels. Overall its a significantly reduced cost compared to a good all encompassing full water block solution on all heat generators, not as good as that of course, but for real world use is very acceptable for the price outlay. Food for thought, doesnt suit everyone, but merits serious thought ..... Regards Zy
	ID: 23888 \| Rating: 0 \| rate: / Reply Quote

Lagittaja Send message Joined: 1 Nov 10 Posts: 6 Credit: 4,539,537 RAC: 0 Level Scientific publications	Message 23913 - Posted: 12 Mar 2012 \| 9:40:03 UTC
	Or you can always go this route to cool your gpu's :D http://www.overclock.net/t/1203528/official-nvidia-gpu-mod-club-aka-the-mod/0_20 I have macgyver mounted an antec kühler h2o 620 to my gtx470. I couldn't fit my zipties through the heatplate so instead I tightened the pump/block unit straight to the heatplate as you can see, and it actually works lol: http://img12.imageshack.us/img12/2369/img20120110182730.jpg Currently it's a bit poorly mounted with a really bad TIM job since I ran out of MX-4 while doing it.. With 800core and 1.037v my 470 is loading at around 54C with 2x Gentle Typhoon 1850rpm fans at full. Ambient is something like 25C. And this AIO wc loop handles the enormous heat load of my 470 REALLY well. I had it running like 17 DAYS nonstop at those clocks and the temps stayed at 54C. Awesomesauce. If I have enough time during this week I'll remount the kühler, apply enough MX-2 this time (bought 30gram tube so I won't run out till like 2016 lol) and try to come up with more mounting pressure. I expect to get temps below 50C with proper mounting pressure and proper TIM job.
	ID: 23913 \| Rating: 0 \| rate: / Reply Quote