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Thread: Cooling question |
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Thread Status: Active Total posts in this thread: 20
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Mamajuanauk
Master Cruncher United Kingdom Joined: Dec 15, 2012 Post Count: 1900 Status: Offline Project Badges: 
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I'm trying to improve the cooling on/in a couple of my systems, they both run the following hardware:
----------------------------------------AMD FX-8350 x8 Corsair H100 CPU cooler (240mm rad with 2x 120mm fans, airflow = inward) 2 x 120mm front mounted case fans (airflow = inward) 1 x 120mm side mounted case fan (airflow = inward) 1 x 120mm rear mounted case fan (airflow = outward) these all create positive pressure, keeping the CPU to around 50C when under full load crunching. The only difference are: System 1
Corsair Obsidian 650D case 32Gb RAM
Corsair Vengeance C90 case 16Gb RAM I've tried the H100 fans with outward airflow, which results in an overall higher temp within the CPU The side mounted location has space for another 120mm fan. My questions are these: How can I improve the cooling? Which is better and why?
Negative pressure within the case? Which of the above provide best airflow? Many thanks in advance... Edit - Added case details
Mamajuanauk is the Name! Crunching is the Game!
----------------------------------------  [Edit 1 times, last edit by Mamajuanauk at Aug 4, 2013 10:37:13 AM] |
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ryan222h
Senior Cruncher Joined: Sep 4, 2006 Post Count: 425 Status: Offline |
50c is not excessive at all for full load CPU.
----------------------------------------If you still want to reduce it more put fans on both sides of the h100 in push/pull configuration.  |
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BladeD
Ace Cruncher USA Joined: Nov 17, 2004 Post Count: 28976 Status: Offline Project Badges: 
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What are you crunching with those 7970s?
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Mamajuanauk
Master Cruncher United Kingdom Joined: Dec 15, 2012 Post Count: 1900 Status: Offline Project Badges:
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@ryan - Yep, thought of that, would it really help though?
----------------------------------------@BladeD - Poem & Milkyway ATM until something else comes along from WCG maybe! Anyone got any comments on the pressure questions?
Mamajuanauk is the Name! Crunching is the Game!
----------------------------------------[Edit 1 times, last edit by Mamajuanauk at Aug 4, 2013 2:51:55 PM] |
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OldChap
Veteran Cruncher UK Joined: Jun 5, 2009 Post Count: 978 Status: Offline Project Badges:
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Positive pressure is wonderful for controlling dust, if you have filters in place, but greater air flow through the case is going to provide better cooling I think.
----------------------------------------If you still have any plates covering the pci slots at rear removing them will destroy any positive pressure and allow more flow as would adding a fan on the side panel to extract heat from around the cards. I guess this may improve your cpu temps but I am less sure it will benefit your cards. Last choice is bigger faster nastier fans to remove the air from the case... in fact more flow all round is an option provided you can handle the noise EDIT: perhaps a fan to remove GPU heat might help too. The old coolermaster 840 atcs had a box which fitted over the slots at the rear of the case. the box was fitted with a fan to help pull the hot air from the graphics cards. I am sure a search will help you find a pic of what I am talking about  [Edit 1 times, last edit by OldChap at Aug 4, 2013 3:45:19 PM] |
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cjslman
Master Cruncher Mexico Joined: Nov 23, 2004 Post Count: 2082 Status: Offline Project Badges: 
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Mamajuanauk... FYI, SN2S is back (although it's still intermediate with lower priority)...
----------------------------------------http://www.worldcommunitygrid.org/forums/wcg/viewthread_thread,35276_offset,40 CJSL Gotta keep crunching.... there's a world to save !!! |
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Mamajuanauk
Master Cruncher United Kingdom Joined: Dec 15, 2012 Post Count: 1900 Status: Offline Project Badges:
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Thanks OldChap!
----------------------------------------I have a fan on the side blowing air into the area of the GPU's, I've been thinking of using it in reverse to remove air from around the GPU's as you say, I'll give it a try... I have the Corsair Link Commander connecting the fans & H100 etc and yes, increasing the noise will increase the cooling, but the noise gets a bit intrusive after a while! I think reversing the side mounted fan and adding another one will be the next test! Many thanks again, I'll report back on the results (it won't be tonight as I have a film to watch)  Any other tips/comments would be much appreciated...
Mamajuanauk is the Name! Crunching is the Game!
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Mamajuanauk
Master Cruncher United Kingdom Joined: Dec 15, 2012 Post Count: 1900 Status: Offline Project Badges:
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Mamajuanauk... FYI, SN2S is back (although it's still intermediate with lower priority)... http://www.worldcommunitygrid.org/forums/wcg/viewthread_thread,35276_offset,40 CJSL Gotta keep crunching.... there's a world to save !!! Yep, got some tasks thanks CJSL! just finished some off today... Many thanks...
Mamajuanauk is the Name! Crunching is the Game!
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Mamajuanauk
Master Cruncher United Kingdom Joined: Dec 15, 2012 Post Count: 1900 Status: Offline Project Badges:
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@OldChap, et al...
----------------------------------------I've reversed the side fan and added another one, this has clearly increased the airflow as the temperatures have all come down about 5C. This includes the CPU, GPU and case temp. The end result is a good reduction in temperatures with little or no increase in noise! I tested it with the following running all at the same time:
3 x FAAH 4 x Milkyway (GPU)
CPU = 0.5 The tests were completed on the Corsair Vengeance C90 case, but I think the Obsidian will return similar results. Many thanks for all the input and advice.
Mamajuanauk is the Name! Crunching is the Game!
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B2I
Senior Cruncher usa Joined: Jan 23, 2011 Post Count: 232 Status: Offline Project Badges: 
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I've done some of the same experiments you are doing and decided to stop GPU crunching for the hot summer months. Kudos to you for persevering! I have even resorted to using AC plug-in fans to supplement the case fans. Take of the back panel of the case and touch the underside of the CPU socket (after grounding you hand to the case of course). If you find that it is hot to touch, a small fan blowing on it will usually bring down the CPU time a few degrees temp. I once even to off the front side panel and put a cheap 21" box blowing directly into the case. cooled every thing down a few degrees but the looks and sound was too much for the wife to tolerate, even for science :).
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