Alright .. let's begin with a little Heatpipe cooling 101
A new trend that started over the past years is heatpipe based cooling. Several advantages directly come to mind as the principle behind heatpipe cooling is quite simple. You move heat towards another spot other than the source. That way you can get rid of that heat not directly away from that source, yet effectively can cool it down optimally on location B. This means less resources and effort is needed at the original point of heat. The less resources I'm talking about is a direct active form of heat dissipation e.g. loud fans. More cooling these days equals more noise, and don't we all hate it?
So here we are establishing the logic behind heatpipe based cooling. Basically if you won't go too crazy on the CPU, with the help of a good heatpipe design you could actually passively cool a processor, which in the end ensures you a silent PC. And that's what it's really about. Optimal cooling versus the noise your PC makes. PC's have become a small oven, you can literally fry an egg on your CPU when it's idling (with no cooling). You are playing a game and you are utilizing 200 to maybe 400 watts throughout your PC, and that my friends generates heat.
High cooling performance and silence didn't belong in the same sentence. If people want performance, they usually needed to buy a cooler that would either create a Tornado in their case, and most probably sound like a jet airplane getting ready to take off. However, this is now a thing of the past, since companies are now finally trying to make coolers that offer both high performance and are silent down to the level of actually letting a user sleep in the same room with that mini tornado rig of his or hers.
This is where heatpipe based cooling kicks in really well.
Believe it or not, but the technology of heatpipe cooling is somewhat based on what we see in a 'refrigerator'. Refrigeration and phase change coolers. When you look closely at the the cooler you'll see copper pipes and cooling ribbons. An internal coolant is inside these pipes and flows from the chamber upwards towards the cooling ribbons where heat will be dissipated with the help of airflow. The cooling method is all based around circulation. Although we just named it gas it's initial cold state is typically fluid like state. That coolant is unusual in that it has a very low boiling point well below 0°C at atmospheric pressure and a freezing point more than 100°C below zero. It is liquid when cold but easily becomes a vapor when heated and vice versa. By absorbing heat from the processor, the fluid will dissolve and form into gas which travels towards the top of the pipes where heat will follow the path of least resistance, to the aluminum fins.
Now there are lot's of heatpipe coolers, the cheaper ones don't have coolant at all and just use gas or even air to transport that heat but the idea of heatpipe based cooling covered in one line is: to move heat from point A to point B as efficient as possible. So the cooling block mounted on your CPU absorbs whatever heat energy is available to it then that heat transports trough the heatpipes to the our rims of the fins where it'll dissipate.
Our test environment:
All modern coolers will work fine under normal circumstances so we changed the benchmark policy a little here at Guru3D. All coolers today will be tested 'outside' a chassis. Meaning less airflow. Secondly we fire off high-end gear at it, and thirdly, we'll run the processor mildly overclocked with a little extra voltage running inside that processor.
eVGA P55 Classified 200 - Core i7 870 1,3v | 80% RPM Now the culprit here is not so much our overclock, but the fact that the processor will receive a little extra voltage which has a direct effect on temperatures. The combo of the overclock + voltage tweak will under any circumstance make temperature more hefty on the cooler.
The cooler will be tested in two conditions. The PC in IDLE as a load test, and at 100% CPU load on all four CPU cores with the help of the Prime95 CPU load tester. Then we redo this test with the processor in an overclocked state.
And for your reference tests are conducted at a constant 20-21 degrees C room temperature. Now for all coolers we created the same circumstances, same voltages, same environment, same ambient temperature. We also used and applied thermal paste on each run.
But first let's have a look at the cooler. Next page please.
Gelid GX-7 CPU cooler review Gelid is a company that made a nice impression a year or two ago introducing themselves by releasing their first aftermarket CPU cooler, the 'Silent Spirit' cooler. After Gelid released that Silent Spirit and then Tranqillo CPU coolers it was time for a new model. Progress is made and anno Q4 2011 it's time to release their third consumer grade CPU cooler. Their latest creation comes in the form of a tower cooler called GX-7 -- aimed at gamers apparently.