mozart999uk wrote: craigtumps wrote: mozart999uk wrote:
Nathan-VST-Plugins wrote:One option would be using a PC liquid cooling system without fans for zero noise, which are quite uncommon, or a more realistic approach, using a set of PC silent fans designed for a low maximum noise generation of few dBAs. :shh:
I thought I read somewhere that for the hotter chips like the i9 (particularly when overclocked) it just isn't possible to cool them effectively using liquid cooling......
Thats wrong, if you are overclocking an i9 you absolutely should use water cooling. The highest overclocks are cooled with water not air cooling.
The problem with air cooling with a heatsink is you reach a point where the heat doesnt conduct quick enough through the metal of the heatsink. So you can put a heatsink the size of a car on the chip but it will still over heat. All the heat just sits at the bottom of the heatsink around the processor. With water it transfers the heat through a very thin metal waterblock and then the heat is transfered to water. The water carries the heat to the radiator where it can dump the heat spread out over the rad. Its similar to how cooling works on a car engine. You take the heat away, then deal with it somewhere else.
That makes a lot of sense to me. I must have read that wrong somewhere.
I'll explain the thought process behind that as you've probably seen me state it. Agreed, that whilst you'll always get the last few percent on water cooling, there are possibly other issues that people don't always account for.
I'm just going to use the 9900K as the example, but this voltage handling outline applies to all chips at one clock speed or another.
On the 9900K to move from 4.9GHz to 5.0 or 5.1 (chip depending) requires going from 1.2v or less to 1.3v+ in a rather brick wall type fashion.
Having a water block move the heat from the centre of the case to the extremities means that you don't have a fan around the CPU slot, which means you don't have as much air flow around the VRM's. Given that you're going to be slamming them whilst you're overclocking that extra few 100MHz this is a rather handy way of encouraging the board to burn out earlier in its lifecycle.
My other objections are pump noise and the fact that you've got tighter fins on the rads at the edge of the case, which in turn require more CFM from the fans than they would at the centre of the case both of which tend to mean more noise, not less than a couple of well-chosen and managed fans.
I'm fully behind the ability to eak out the last few MHz if you have the urge too, but a lot of people underestimate proper cooling around the internal components outside of just trying to supercool the chip itself.
We tend to water cool all of our rendering boxes as hitting 5.1/5.2GHz with stack of Titan cards is what those things are all about and we add more cooling to ensure airflow for those VRM's to allow for it to be stable long term... it's a lot of fans through. Alternatively, I can hit an all core 4.9GHz on air with a couple of fans and airflow directly over the VRM's with the lower voltages and I value that trade off long term.