|tzetsin ||September 25, 2010 01:50 PM |
The rad is cooled by the air inside the case, which is blown by the exhaust fan through the rad and out the back of the computer.
the cpu gets hot, the waterblock absorbs the heat, the water flows through the waterblock absorbing the heat from it. the heat travels through the pipes into the radiator, the radiator has very very thin fins with water tubes in between, these fins absorb the heat from the water. the exhaust fan blows air through the radiator across the fins absorbing the heat and then flows away from the computer, completing the heat dissipation cycle.
Using cooler air is more efficient than warmer air, but it is all relative. The air from inside your case isnt sufficiently warm enough to cause enough of a detrimental effect to the efficiency of the radiator.
For example. when you use air that is at room temperature to cool the radiator your cooling system might be at 50°C, when you use warmer air from inside your case, the water temperature may rise a couple of degrees to say... 52°C. That is not to say that your CPU is going to benifit much from the 2°C cooler water, as in reality your cpu, unless you are EXTREME overclocking will likely remain at whatever temperature it was running at in either instance.
The reason that your computer is setup the way it is, using warmer case exhaust air, Is more of design efficiency than cooling system efficiency. If they were to design your system to use cooler ambient air, they would have to mount the radiator away from the case, making the case bulky and harder to handle and much more expensive.
As it is, the design is efficient. the case needs to exhaust air anyway, and has a fan blowing out. Mounting the rad in front of the blowing air utilizes air from a fan that already has to exist, allowing the radiator to mount flush with the case and reducing the amount of materials needed to build the system and keeping the computer looking sleek and professional.