View Full Version : Dual Core Cpu

07-15-2005, 10:25 AM
A question on dual core cpu's.
Cooling system for the 2-core cpu >> If you were to purchase the sys or build, should you upgrade the cooling sys. Is there a variety of different cooling systems that you can select from? Do the dual core cpu's run at a lower temp than the high end single core cpu's??
Thank you

07-15-2005, 07:49 PM
From what I understand, dual core CPUs run at roughly the same temperature as their single-core counterparts. As such, you need not worry about purchasing any special cooling for your dual core CPU. Cooling for single-core parts will also suffice for dual core CPUs.

07-16-2005, 03:26 AM
Well, some dual-core CPU's are hotter than others, and likewise are hotter or cooler than some single-core CPU's. But as long as you use the proper cooling for them, nothing should get out of hand, and no extra case cooling will be required (vs a similar high-end single-core CPU system).

The cooling you should use for a dual-core CPU should be based on the total heat dissipation. The easiest way is to get a retail version of a dual-core CPU and use that HSF unit! :p Another good way of looking at it is that only the upper $900+ dual-core CPU's will need more cooling than a 3.6GHz P4. That is to say, only the dual-core 840's from Intel, and the 2.4GHz dual-cores from AMD, will require uber cooling setups (as can be gotten from a 92mm+ all-copper Zalman).

One of the reasons for the relative variance in the required cooling is related to the fact that dual-core CPU's aren't as active (it's tougher to keep two cores pumping away at 100% load vs one core) and the increased die size helps to dissipate more heat. Also, the dual-core CPU's we've seen so far aren't as speedy as their single-core counterparts. Intel's PentiumD 820 for instance is only running at 2.8GHz per core, and AMD's Athlon64 X2-4200+ is only running at 2.2GHz per core. Intel and AMD both also paid a ton of attention to reorganizing the transistors for proper heat dissipation as it relates to having two cores side-by-side on a single die. Parts of the CPU cores that are active at the same time were kept away from eachother - stuff like that. But even so, it was quite easy for both of them to fit two cores in a single die because the darn things are so small that the package/socket is actually becoming rather large in comparison. Strange to think about nowadays, but at 90nm, CPU's are a lot smaller than you think.

07-17-2005, 09:39 AM
Yes thankyou for your time and experience of information Sylvander. Just looking ahead for the eventual future of dual core 64 bit application software which will probably really come aboard after the LongHorn win starts too make its run.
Thank you.