Watercooling!

[Technoid]

Pics

I seem to have promised pics

Well, here ya go:


It does not leak! Great

The tubes was about right lenght! Great

Pre tests! Still no leakage, Great :

There, finished!

The suplied fan that is atached to the radiator is a ~2500 and the fan to the right is a ~3000 so Il see what diff it make.

More pics to come

[Greebe]

Consider this, a P3 800 thermal rating is ~25 watts and you are already seeing 46c... contrast that against the XP1700 with it's ~68watts

[Technoid]

Then consider this:

As earlier stated:

Most HS seems much more effective on my Athlon than on that P3 as the diff is only aprox 5-10c

I seriously believe that its values are severely flawed.

Example:

My Duron 700 overclocked to 930 used the same HS (a taisol) as the P3:800
And the P3 still reported the highest temps….

And the Thermalright SK6 that manages to cool my Athlon 1333 to 50-52 idle with a slow 21cfm fan couldn’t cool the P3 down to more than 45 with a 30cfm fan (loud as hell)

So if the P3800 is ~25w than why is it almost as hot as a Athlon 1333 (that is a ~70w) ??

[Greebe]

I seriously believe that its values are severely flawed.

Example:

My Duron 700 overclocked to 930 used the same HS (a taisol) as the P3:800
And the P3 still reported the highest temps….

And the Thermalright SK6 that manages to cool my Athlon 1333 to 50-52 idle with a slow 21cfm fan couldn’t cool the P3 down to more than 45 with a 30cfm fan (loud as hell)

So if the P3800 is ~25w than why is it almost as hot as a Athlon 1333 (that is a ~70w) ??

Easy enough to explain... the P3 has an internal diode sensing the temps directly from the substrate and the Duron/Athlon temps are being taken externally via a thermistor... HUGE difference.

On my XP1800+/MSI 745 Ultra the temps are being measured directly from the internal diode. If I place an older Athlon like yours on it there is an external thermistor mounted underneath the cpu to measure it's temps. Without compensating for the difference you will always have a huge varience as you're experiencing.

[ZokesPro]

Greebe: You talk about internal and external diodes.
Say you have a P3 1GHz running at 50C.

And you would have the same P3 with same heatsink etc.., would the temp be registered as higher or lower if it only had an external diode?

[Greebe]

Well first off a thermistor which is the most commonly used device to measure temps on any MB is a positive thermal coffecient resistor, not a diode.

The external measurement would always be significantly lower.

[ZokesPro]

That's what I expected. Wasn't too sure though.

[Wombat]

Usually 10C difference is a decent/safe rule of thumb. Plus, external temp sensors have a time delay that is like an eternity. A good power step can raise a CPU temp 25C faster than the milliseconds it takes to measure the diode.

[Technoid]

Switched fan, 2c less

It still kicks the SK6 behind....

[Technoid]

Originally posted by Greebe


Easy enough to explain... the P3 has an internal diode sensing the temps directly from the substrate and the Duron/Athlon temps are being taken externally via a thermistor... HUGE difference.

On my XP1800+/MSI 745 Ultra the temps are being measured directly from the internal diode. If I place an older Athlon like yours on it there is an external thermistor mounted underneath the cpu to measure it's temps. Without compensating for the difference you will always have a huge varience as you're experiencing.

ok, fair enough....

Could you explain this one then?

When I changed My Taisol (aluminum) to the SK6 (copper) my temps sunk 10c on the athlon using the same fan....

When I got the Alpha I put the SK6 on the P3 instead of the Taisol the temps barely sunk 4-5c with the same fan

or is it also the "temp probe is inaccurate" thing....

[Technoid]

Found another review:

http://overclockersclub.com/iceberg1watercoolingkitreview.php

The pump they used is rated at 150 gal/hour and my pup is only 118 gal/hour

Still, I'll have a fun time on the phone tommorow talking with the suplyer!

Agravatingly hard to conect pump (I had extra stuff, othervise I would have been verry mad right now )

As Greebe said: way to low performance

Fun thing to test:

Ice cubs in the reservoir (condens is not fun tho )
Better pump!

[Greebe]

Simply because the closer to ambient temp that it already is at the harder it is to dissipate heat.. For example the lowest C/W rating you can achieve without active cooling is ~0.10 (No a fan and or water is not active cooling... a pelt of vapor phase would be)

Pump flow rate has very little effect on overall temps, so don't worry that they supplied you with less. I've run my pump (96g/h) at ~half of it's puny amount and the temps rose an entire 1°c


As far as that review is concerned Matt (whoever he is) needs to learn howto properly evaluate testing methods. Not once did I see where he mentioned room ambient temp or even case ambient temps. Without at least ambient room temp being shown all his results are flawed... and Seti@Home is hardly the best means of maxing out a cpu. Review = bogus crap

Also note that at the bottom of the page he states that the kit he recieved was a prototype and the actual shipping kits wouldn't be shipped with the supplied parts he recieved. Further proof that this review is pure crap

[Technoid]

Should I then even consider testing it on my Athlon?

It does cool slightly better than the SK6€. (The alpha I got also cools slightly better than the Sk6)

Would an extra radiator help?

Putting the radiator in the freezer? (only kidding )

[Greebe]

A better waterjacket would make the biggest improvement, then radiator, then pump (tho I wouldn't swap that out as it is plenty for any cpu out there)

[Technoid]

sadly any other waterblock awailable is almost expensive as the whole kit