Massai

Killer network? Update driver.

Generally, phase change cooling uses the heat of evaporation. F.e. - when you want to heat up water, you need just above 4 jouls to raise temperature for 1 Kelvin degree (Celcius) of 1 gram of water. To evaporate this 1 gram, you need over 2200 jouls. To get this 1 gram of water to boiling temp, lets say from 20 C to 100C - you need 80 times 4.192 - around 260 jouls. Evaporation of this gram needs almost 10 times more energy. Evaporation is a complicated process, but shortly speaking - it can "suck" energy from the material. Evaporating water can lower temperature of the surface from which it evaporates even BELOW ambient. Thats how our sweating works - microdrops of sweat evaporate. Condesation is the oposite process and this heat is released to the material on which steam condensate. But do not confuse this phase change systems with systems that use compressors. Compressing gas (air, steam or another gas) heats up this gas. Laws of physics. When you release the gas and pressure drops - the temperature also drops to the level before compressing. This is used to create a temperature delta, difference between gas and surrounding - you can cool this compressed and warm gas, and then release it - its temperature will drop for the same amount of degrees. F.e. you compress gas and heat it from 20C to 80C degrees. Your ambient temp is 20C - you run this warm gas through radiator, it cools down to lets say 30C. Than you release, and it cools down for 60C (as it went up from 20 to 80), but starting from 30C, and you have -30C gas. Sorry, I don't use Freedomheit degrees ;-). Generally, you don't have to use compressor in phase change system - pump is enough just to push gas to condenser.

Does it matter how heatpipe cooler is mounted? Usually heatpipes are horizontal (with mobo vertical, as a typical layout in tower case). Heatpipes use capillary effect to move liquid inside heatpipe, but with heatpipes in vertical position with heat source (CPU) below, like in old fashion desktop case - wouldn't this effect be buffed by gravity? Steam goes up, water goes down... When we talk about vaporchambers this orientation is very important, effectiveness 100% in horizontal, 50% in vertical, 0% upside-down (heat source above vapor chamber) or even acts as thermal insulation. There aren't many vaporchambers coolers on the market - a few for rack server solution, and i think Cooler Master GTS (or v8, can't remember now). AFAIR nvidia used vapor chamber in some FE cards (580? 680?). And now... Usually GPU is mounted upside down. Heat source above heatsink. And they usually use heatpipes. Water inside has to move against gravity. Usually youtubers test coolers on open benches, and mobo is horizontal. Heatpipe cooler, like dh-15, is tested in optimal layout. Did anybody tested this effect? GPUs in different layouts, in the same conditions? CPU coolers in different layouts? The problem with using just inverted orientation in PC case, with mobo facing right side - is with CPU cooling. Air cooled CPU inflicts GPU cooling - when it is below GPU, the heat goes up and heats up ;-)) back of the GPU... Anyone have seen such tests?