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Heat generation questions


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Hello! First post :D:


I have previously built a fanless LGA775 system that worked well, but now I am looking to build a fanless LGA1155 system which means I am looking for DDR3 memory with passive heat spreaders. I understand that memory is not the most significant heat producer in a system, but I am looking to maximize my heat tolerance through all means possible, and so I would like to understand a little more about memory and heat generation.


Question 1: Does corsair publish how much heat their modules produce under idle and full load? This may help me decide which models to buy.


Question 2: For a given type of RAM such as DDR3, how does temperature scale with capacity? ie. how much heat is generated by an 8GB module compared to a 4GB, 2GB or 1GB? This would help to determine whether eg. 2x4GB produces more heat than 4x2GB, but also the heat penalty for installing more overall memory.


Question 3: Is there any data on heat generation as a function of RAM timing and clock speed? I would be prepared to buy slower memory if the heat saving was significant, so some knowledge would help a lot.


Thanks a lot!

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I don't have any answers for you but I have some information that may help you.


I can imagine only populating 2 out of 4 DIMM's would be best. You get the speed of Dual Channel and the modules aren't cramped.


Best of luck with your build and finding the answers you need.

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  • Corsair Employee

Voltage is the factor that makes the RAM runs hotter. Since most DDR3 RAMs are now rated at 1.5v, most of them will have similar amount of heat produced. Plus all the DRAM heatsink that they use are all passive in a way.


In general, DRAM temps are never measured, because the heat that they generate are minimal or rather insignificant compared to the total amount of heat the system or other components will produce. The value is irrelevant to consider, knowing that your CPU/MB alone will be enough to determine how much cooling you require in the system. Added the GPUs (single/Xfire/SLI) and some HDDs, then DRAM heat value becomes more irrelevant.

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