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I assume you mean the total system, as with HyperTransport and an on-die memory controller, there isn't much the Athlon 64 per se doesn't do well, in some respects (like the latter) outpointing the PPC 970FX, let alone any G4. A64s meet Alien's standard of WOO-HOO!! fast, so I assume the QS's OS/software plus hardware package is more to your liking.

There actually is quite a bit you can do on the Dark Side with the requisite expertise and that kind of affordable power, but you're right- despite a year+ of post-release optimizing unmatched on the other side, even the DP2.5 w/ ATi X800 XT can't approach my Halo Timedemo scores, even on the current 2.2GHz Athlon XP. The A64 will take that performance Beyond.

It's academic now, but you should've come to WFA and gotten things straightened out. I don't quarrel with platform choices, but that kind of thing needn't happen. I've a second Win project going; it's all multimedia- TV, TIVO, DVD (etc) -type stuff. I've never had those sorts of behaviors in those apps.

Sound I can help with.

Ok, I've dropped the CPU fan speed so that the tower is basically inaudible. At the moment, I'm doing a MPEG2 encode, using an GL screen saver as my desktop, playing an iTunes playlist, using activity monitor, mail and using MSN. The heatsink is quite hot, not untouchable, but hot none the less. I've been searching applications to see if I can find a temperature monitor, but they only sense the WD HD.

I haven't seen any kernel panics or glitches like if you overclock a CPU or have corruption problems. ie a B&W G3

Hot, but quiet. I think the ultimate mod would be to add an adjustable speed to the CPU fan. It just can't keep it as cool as I would like when on the low setting. Then again, I rarely do large slabs of 100% CPU usage.

Well it is figuratively speaking, it is hot, but nowhere near as hot as the Geforce 2MX (That burnt my finger when I touched it) and not quite as hot as the Pismo's which reports over 100

That would make sense, and explain why it spins up...

Well I actually did a bad thing, when I swapped out the fan about a week ago, I didn't connect it up. It has run constantly for over 6 days without the CPU fan! That includes some heavy anime sessions, UT2004, Postal 2 and at least one DVD remaster.

I opened it up to show a mate the guts and I noticed that the fan wasn't running....

I'm guessing its the DP thats why it runs hot, but even without my CPU fan it was touchable. Even at the base. I guess Apple built em tough!

Ouch.
***
Yes, fans with thermal sensors are available; not even that expensive. However, they're usually meant as case fans; but nothing need stop you from using one on a CPU, as long as the temp envelope and orientation are correct. Some dedicated PC hardware like this is available with separate sensors.

Function 2:
Temp.detector 2000 rpm at 20 єC~
5500 rpm at 55 єC

For the last year, one of these has been cooling MA3, the Clan MacAddict server. I co-designed it, and this HSF was my monetary contribution. The temp sensor is placed on the side of the CPU die... of course, nothing this size would fit this project.

Some Athlons have been rated for as high as 95C, but I'd hate for one to spend substantial time anywhere near that hot. The watercooled 2.5GHz DP apparently runs nearly that hot sometimes, but has an elaborate heat-sensing/ cooling arrangement that spins up the fans under load. Even so, there've been reports of thermal runaways; but at least Apple stands behind their warranty. Apparently The Steve really wanted to avoid a repeat of the 'year at 500 MHz' debacle, and this was one way to get half the jump to 3GHz he mentioned at the G5's intro.

Could one of you guys explain the fact that my Dual Ghz Quicksilver 2002's CPU fan is suddenly on all the time, and sometimes full blast at random?
Nothing like hardware or software changed on this machine before this happened.
Is it just because it's winter and the room temerature is higher than normal?

I now closed the hole in the rubber shroud but it's noise is still much louder than before. I cannot live like this!

The side fan is working and dust is something I hate so it's nowhere near my machine.
I actually dampened the sidefan's cover with 2 layers of airyplastic (that the whitestuff in which my DVDplayer came) and closed the small holes and cracks of that cover the side fan. It's sound is somewhat dampened now. But after that the whining from somewhere started.

I'm gonna find some quiet replacements over here in Holland for it. Cause I'm getting crazy of this sound.

Don't get me wrong! If this is what you mean; I didn't of course close the round holes on the side of the case behind the plastic outercover. So there is nothing major obstructed. All I did was close the cracks and holes on the sides of the cover of the sidefan. So where it connectcs top the outer case. Because I noticed strange dust trails and thought that any whisteling holes should be closed off.

Now what??? My PSU fan is the one freaking out here.
When I start up the fan sounds like it has trouble to start up. It makes short bursts which sound like moans really. After some minutes it switches on but not on a continues level. It's working fast in louder, longer bursts, and then slower again. The air blowing out is not warmer than usual.
As I said before nothing hardware or OS wise changed in my Quicksilver 2002 DP 1Ghz.
Could the temperature sensor be failing?
Who knows what the hell is happening here?

i've opened up my PSU before, and it's pretty damn easy to replace the fan if need be.

(this is assuming your warrantee is out, which should be true)

I'll get to that then.
Does somebody know the specs of the PSU fan?
Size, Watt draw, Voltage, connectors?
Or a good site to find this info. I used to have a great mod story with specs of all the fans bookmarked but I can't find it anymore.