A pity you didn't measure the maximum head before and after as well. I'm wondering if it might have been reduced.

More details on that type of circuit.

I was reading about that "FluidXP" stuff and it's mostly water, so I'm not impressed.

No, no, no. In those lemon things, at the surface of the zinc or aluminium or whatever the more reactive metal is, atoms lose electrons to form positively charged metal ions (cations) in solution. The electrons flow through the wire and clock and more wire to the other electrode. There, at the surfa...

Here's one:
http://forums.silentpcreview.com/viewto ... 6932#66932

I spent a while thinking about a system like this too. The difficult bit is getting very frequent observations of the fan speed while supplying it with a low voltage or small duty cycle. I'm not sure whether it's possible by monitoring the signals the fan gives (regardless of whether it has a third ...

How about removing the fan from the PSU in a positive-pressure case, just letting air flow out through it without a fan? Perhaps even remove the fan from the PSU and use it as an intake fan. In the minidisc player, perhaps it's magnetic dust from the disc. Not sure how likely that is, but in somethi...

I mentioned it before a while back in some other thread, but I want to recommend these pages on corrosion in PC watercooling system, at www.watercool.de (the corrosion pages and some other articles are linked from their front page). Very good, evidently well-researched. German, but the translators a...

I still have the suspicion that the best way would be to have the PWM frequency the same as the fan switching frequency though (rotational frequency x number of poles), with the pulses timed to arrive at the best phase of the fan switching cycle. I don't know how you'd achieve that, but it could be ...

Any recommendations for simulation software?

At last, some sense being written on this issue! The overclockers/tips article mentioned above is very bad: it was written by someone who does not understand the chemistry at all. The ocforums thread is well worth a read. In it, someone points out a few of the things wrong with the overclockers arti...

silvervarg wrote:Can you name one platform that does not have Java support?

OpenBSD

silvervarg wrote:It won't take dozens of megabyte of RAM to run this in a JVM

Just the JVM itself (version 1.4 from Sun) takes dozens of megabytes, if I remember rightly. (Oddly enough, it seems to need a lot more on Solaris than on anything else.)

I wouldn't do it that way. If you want to smooth out the PWM waveform, I'd use something based on the idea you've already seen in this post (capacitor, inductor and freewheeling diode) but with smaller values for the components. The current draw of the fan would be all you'd need to know about it to...

I think some scripting language such as Python would be better than Java for this. Java takes dozens of megabytes of RAM for the JVM, even if you write a very short piece of code. Java is not available for as many operating systems. Python takes less memory and, being an interpreted rather than a co...

You can convert PWM to a controlled steady voltage using a diode, inductor and capacitor. I've described the smoothing circuit in this other thread: http://forums.silentpcreview.com/viewtopic.php?t=9502 You get the efficiency of PWM, but the fan sees only a very small ripple (only 0.4V at 3A, accord...

A recent article on overclockers.com describes a PWM fan control circuit with smoothing. "Build A Pulse-Width-Modulation Fan Controller" http://www.overclockers.com/tips1127/ Here is the interesting part: PWM -----+---UUUUUUUU----+-------+-----+--smoothed-output--+ 12V/0V | coil | | | | | 470uH | | ...

I started a pump survey thread a while back:
http://forums.silentpcreview.com/viewtopic.php?t=8141

When choosing a material you might want to consider flammability, and what kind of smoke is produced when it burns.

My guess is that it's for some sort of computer in a vehicle.

I imagine you could get it to work if you had a slow fan to stir the air inside the case, so long as the case walls are reasonably conductive (or watercooled).

They're quite configurable. You can choose what things you want and burn your own CD. (They're both derived from Debian.)

Looking unhappy, paulus. Was theoverclockingstore yours?
You say "we" of watercoolingshop. That sounds as though you should ask MikeC to give you a "vendor" tag.

Welcome to the forums.

Good luck, grandpa_boris.
In case she doesn't like it though: I have had good results with acrylic paints on plastics (though not pink, and not computer parts).

Also morphix.
Knoppix is a variant of morphix (or possibly the other way around: I don't remember for certain.

Both turn up from time to time on the cover CDs of computer magazines, especially linux ones.

Quite right: any of the processors mentioned here would do fine. In fact, any processor that works in a board new enough to have ATA100 or better will be fine. That old small drive: if it shares an IDE bus with the main drive, aren't they both limited to the speed of the slower drive? If that's the ...

I forget where, but I remember reading an article comparing the power requirements of memory modules by different manufacturers.

Some motherboards can take, say, 3Gb of DDR333 but only 2Gb of DDR400. According to that article, this is because of the amount of power that they require.

What pumps are you all using? What are they like?
I've made a thread for pump reviews:
http://forums.silentpcreview.com/viewtopic.php?t=8141

Important detail they don't mention: when they're not using all the fans, what do they do with the others? Cover the holes, leave the fans in place but turned off, or remove the fans for best airflow? Someone has already asked about that in the comments section, but there's no answer at present.

I feel exactly the same way! You can have a radiator without a fan. http://overclockers.com/tips857/ Someone here uses a 17 gallon plastic tank (just for CPU, I think). HerosFormula uses a pair of oil coolers for PSU & video card, with no flow through them at all so far as I can tell: they seem to b...

Why do people keep saying this? A big car radiator will present less flow resistance than a small radiator, because it has many more pipes in parallel through which the water can flow. Car radiators are almost always single-pass, unlike many "PC" radiators and some heater-cores and oil-coolers, whic...

I imagine dyes might well come out with different intensity depending on the type of plastic, so it might be hard to get the colour to match. (Obviously, this isn't so much of an issue with black.) Still, if dye doesn't work you can still resort to paint afterwards.