Liquid Cooling Myths

[relttem]

i know of a material which will REALLY throw a wrench into all of your equations: graphene can't wait to see what this "little" guy will do!! (and the discussions trying to prove/disprove theories should be a hoot to see ) note: for those that don't know what this little miracle is - it is basically a single atomic layer sheet of carbon (similar to graphite, but not). it's properties deal with nano-scale properties (which seem to defy physics, but actually start relying more on quantum physics for its properties). probably won't see this for another 10 yrs or so, but who knows....this little guy is gonna change EVERYTHING!! just throw out the old rule books, because this guy breaks all the rules. "cool" stuff indeed.

We are already testing graphene.. It does have some issues

[Dazmode]

The one I have to deal every day:

"You can buy all the parts you need for your build from the first try!"

Eh, right!

[matari]

The one I have to deal every day:

"You can buy all the parts you need for your build from the first try!"

Eh, right!

You can It's called a kit!

[shazza]

Glad to see discussion still going here (I've been traveling, so haven't been checking in as often as usual).

@defect9 - Thanks! You brought up the myth about thinking water cooling would generate less heat in the room - that's a good example of the type of stuff I was looking for when starting this thread. It wouldn't surprise me to think a large percentage of people believe this.

[tiborrr]

actually u both are correct...

Putting on my serious hat...

What your saying is that by watercooling the die itself draws less power.
Well that has to do with overall interference from heat and materials. ie.. the super conducting metal we all look for.

As things get hotter, more energy is lost via HEAT.. adur... remember physics.. nothing is for free.
This is where ur seeing all the voltage leak... its HEAT.. and a LOT OF IT.

Now in chew's case... and dont get me wrong.. im not anywhere near chew's level in knowledge.. i think its because a physical limitation inside the arch which prevented the cpu from scaling any higher.

Once again physics... u can never get something for free. and you must always play the game.. and no u can never cheat!

?

This post doesn't make any sense at all.

1) There is no such this as voltage leak. We are talking about current leak.
2) Only one of the above theories can be right. Papers and practise supports our theory that colder CPUs draw less power and as a result puts out less heat. That means that less heat needs to be removed with our cooler.
3) Wait what? Chew simply stated that because of the low die temperatures their CPU was, albeit being severy overclocked (@8GHz) and overvolted (@2V), still within the TDP.

[Morphling]

Ok, I have a good one "Hey man, since I've WC'd my rig, the CPU IDLE temps are about 5ºC!"

Ok, so if we think a little bit it's not impossible, but very improbable :P You see, even you live on Alaska, Finland, Norway, Denmark, etc, and you don't have an insulated house, or even live in the street, or... You are dreaming lol!

[eXa]

Or keeping the rad outside the window

[gmat]

2) Only one of the above theories can be right. Papers and practise supports our theory that colder CPUs draw less power and as a result puts out less heat. That means that less heat needs to be removed with our cooler.

It's not just CPU's, it's all conductors and semi conductors. Semi conductors even become full conductors under a certain temperature. Same goes for supra conducting materials (they have to be kept UNDER a certain temperature). It's because heat promotes Joule effect (heat production from entropy of the system), more heat = more Joule losses (or less efficiency if you prefer).
Also when considering the power draw of a semi conductor such as a CPU, a part of this power is transformed into work (aka transistors switching states), the rest is lost in heat (Joule effect). The efficiency is not 100%, or 0%, it's something in between (i dont have the figures for modern CPU's).