Socket A Coolers - That Don't Kill

Mr-Tweak writes: "TweakTown have just put up their Socket A Cooler guide entitled "Socket A Coolers - That Don't Kill". In the guide they review and test out the Global Win FNP50, Global Win FOP32-7K, ATTech CM25 and the ThermalTake Chrome Orb."

Comments

Wimps!

[Signal 11]

Wimps! Don't these people know that in order to create the Black Hole Quantum Computer (see prev slashdot article) we'll need HEAT and LOTS OF IT? The way I see it, we'll ring the Laptop o Death with some P4's and seal it in styrofoam.. once it heats up to, what did they say - 1 billion kelvin? - then the damn thing implodes into a black hole and I get one helluva quake game.. for about 1.8 nanoseconds until the world is torn apart by the gravitational forces. But.. IMAGINE THE FRAMES PER SECOND YOU'D GET!

Water cooling

[geoffeg]

Well, since the subject was posted to slashdot I figured this would be the best time to ask:

I'm interested in doing a few water-cooling projects, mostly for the fun of it. I've seen webpages of people that have used copper sheet and welding to using the end of a PVC pipe. Is there a company out there that is making a commercial-quality water cooled heatsink?

A few points that I believe are important in water-cooling:
* Safety: I don't want my heatsink to spring a leak and fry my system.
* Noise: I want a quiet water pump that isnt much louder than my case fan.
* Size: I don't want to have to invest in a huge pump and radiator that sits outside my case.
* Price: I don't want to have to pay over $150 for the unit..

I am willing to make my own. I'm handy with tools and can usually hack something together correctly given the time.

Any links/ideas/discussion?

Re:Copper is wayyy cool - details

[paled]

I had included an ASCII diagram, but it was rejected as a junk post.

thermal conductivity coefficients:

k [=] W/m deg C

assume 30 deg C

copper (pure) 383

aluminum (pure) 201

so Copper has a value (383 - 201)/383 = 47.5 % higher
>
So there are multiple resistances involved in heat transer:

1. CPU internals to CPU exterior surface (internal) (user cannot influence this)

2. CPU to Thermal Paste (interface)

3. Thermal Paste to Heat sink surface (interface)

4. heat transfer within heat sink metal (internal)

5. heat sink to air (interface)

Assumes:

- the use of thermal paste applied as a uniform thin film.

- constant heat duty - chip has been running long enough to be at steady-state temperature.

The heat transfer at (5) is maximized by having a large relative surface area of metal to air transfer area compared with the area of the heat sink in contact with the heat source. By using forced convection (fan) the heat transfer coefficient is increased.

The main improvement by using copper is that the temprature profile along the length of the fin is more uniform, meaning that the same driving force for heat trasfer is maintained, provided a constant heat duty. This produces a smaller temperature at the CPU-Heat Sink interface.

But the interface resistances are most likely a greater factor in the overall heat trasfer - hence the reason why overclockers wetsand the machined interfaces with 220,400,600 grit paper to minimize surface roughness.

I don't have thermal conductivity values for thermal paste - anyone have a k value?

If you're interested, I can provide an example problem from J.P Holman's Heat Transfer with actual values.

Old news.

[Inoshiro]

Dan's Data, a nice little tech site run by an Aussie with a proper appreciation for IBM keyboards, already had something similar posted back on the 18th. Of course, he also has a page on how to properly destroy your PC.

(If you really want a laugh, read the comics, too.)
--

And now, for the Pentium IV coolers....

[jmenezes]

Yes, we are now testing out the coolers for that brand-new PentiumIV system you've been drooling about!
In our labs, we have just aquired the new Intel-recomended case for these babies, and we love it!
comes complete with an AC unit to remove the extra heat that the heatsink doesnt take care of.
But for what everyones interested in, the coolers themselves.

First up, we have the Thermaltake GOLD orb, made of solid 24k gold, to improve heat transfer, complete with dual 80mm fans to remove the extra heat caused by this hot chip.
Next up, we have the GlobalWin HoT32, sized at a nice 6"x6"x6" package of pure copper, with dual 120mm fans to keep that nasty heat away.
And Last up, we have the Alpha bRN56+, at a slightly smaller 5x5x5 clock of copper, but with what could very well be the more interesting feature, the Solid gold copper inlays, and the built-in pump connectors, making this an ideal candidate to hooking up into your house's AC system for that extra cooling effect.

And now for what everyones been waiting for, how well do these babies cool?
well, time to go take a looksie

Onwards to Page2--->