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Old 2014-11-17, 20:48   #1
RienS
 
Nov 2014

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Default Good air-cooler good enough for overclocked i7-5820K

Hi,

I am building a pc that I want to use it for Prime95 24/7. It will be built with an overclocked intel i7-5820K (from 3,5 to 4,2-4,5 GHz) with a Cooler Master Hyper 412S aircooler (one of the best aircoolers atm i heard.) Is this cooler suitable or must it be upgraded to a liquid cooler (Corsair Hydro H80i)?

Thank you
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Old 2014-11-17, 21:06   #2
paulunderwood
 
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You will probable be best off by running at stock. Why overclock by 20% when you will most likely get errors on long runs, while searching for the next Mersenne prime?
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Old 2014-11-17, 21:17   #3
Prime95
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Quote:
Originally Posted by RienS View Post
Hi,

I am building a pc that I want to use it for Prime95 24/7. It will be built with an overclocked intel i7-5820K (from 3,5 to 4,2-4,5 GHz) with a Cooler Master Hyper 412S aircooler (one of the best aircoolers atm i heard.) Is this cooler suitable or must it be upgraded to a liquid cooler (Corsair Hydro H80i)?

Thank you
Overclocking the CPU is not nearly as important as buying fast RAM. Buy at least DDR3-2400.
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Old 2014-11-17, 21:33   #4
Mark Rose
 
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Quote:
Originally Posted by RienS View Post
Hi,

I am building a pc that I want to use it for Prime95 24/7. It will be built with an overclocked intel i7-5820K (from 3,5 to 4,2-4,5 GHz) with a Cooler Master Hyper 412S aircooler (one of the best aircoolers atm i heard.) Is this cooler suitable or must it be upgraded to a liquid cooler (Corsair Hydro H80i)?

Thank you
The best anyone has overclocked that CPU so far is about 4.3 GHz, and it's not stable for long.
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Old 2014-11-17, 21:37   #5
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Quote:
Originally Posted by Prime95 View Post
Overclocking the CPU is not nearly as important as buying fast RAM. Buy at least DDR3-2400.
I have my 2400MHz RAM running at 1800MHz now as I was experiencing NMI errors and had a much unwanted reboot
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Old 2014-11-17, 21:59   #6
pinhodecarlos
 
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i7-5820K uses DDR4, not DDR3.
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Old 2014-11-17, 22:02   #7
RienS
 
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thanks for the fast reply all. I go for a non-overclocked i7 4790K then and a 8 GB DDR3. Also a Corsair Hydro Series H60 cooler just to be sure my cpu won't overheat
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Old 2014-11-17, 22:06   #8
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Quote:
Originally Posted by paulunderwood View Post
I have my 2400MHz RAM running at 1800MHz now as I was experiencing NMI errors and had a much unwanted reboot
I feel your pain. One of my Haswells isn't quite stable at 2400. I downclocked to 2133 and have had no issues since. BTW, G.SKILL was the manufacturer of the memory that I cannot make run as fast as the manufacturer claims it should.

Quote:
Originally Posted by pinhodecarlos View Post
i7-5820K uses DDR4, not DDR3.
Good catch.
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Old 2014-11-17, 23:03   #9
RienS
 
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Quote:
Originally Posted by Prime95 View Post
I feel your pain. One of my Haswells isn't quite stable at 2400. I downclocked to 2133 and have had no issues since. BTW, G.SKILL was the manufacturer of the memory that I cannot make run as fast as the manufacturer claims it should.



Good catch.
hmm, maybe a 16GB DDR3 2400Mhz 2x 8GB (Corsair Dominator Platinum - High end) is a better option then. It is way more expensive but it has a better cooling function.
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Old 2014-11-17, 23:55   #10
kracker
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Quote:
Originally Posted by RienS View Post
hmm, maybe a 16GB DDR3 2400Mhz 2x 8GB (Corsair Dominator Platinum - High end) is a better option then. It is way more expensive but it has a better cooling function.
You need DDR4, not DDR3. It won't work.

Last fiddled with by kracker on 2014-11-17 at 23:55
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Old 2014-11-18, 00:01   #11
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DDR3 is apt for the http://ark.intel.com/products/80807/...up-to-4_40-GHz (see post #7)

Last fiddled with by paulunderwood on 2014-11-18 at 00:17
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