Search found 327 matches

by fmah
Sat Apr 03, 2004 12:47 am
Forum: Watercooling
Topic: watercooling: distilled/deionized water?
Replies: 18
Views: 12266

I would use distilled water, and it used to be pretty easy to buy at the store. I remember it being available where rubbing alcohol and contact lens solutions is, but I haven't looked recently. You could make your own, by catching the steam from boiling water. Deionized water is looking to get ions,...
by fmah
Sat Mar 27, 2004 10:08 am
Forum: Cases and Damping
Topic: Making screw holes?
Replies: 14
Views: 3275

Yeah, short drill bits, although if you're not doing that many holes it probably doesn't matter.

If you use WD-40, then the cleanest way is to wipe it on the bit and the area to be drilled. If you have a liquid dropper then you can just put it on the hole area you are drilling.
by fmah
Sat Mar 27, 2004 9:24 am
Forum: Cases and Damping
Topic: Making screw holes?
Replies: 14
Views: 3275

I think that center punches and center drills could be found at home depot. I haven't looked for them there though. I don't think you need any specific type of drill, unless you are really doing a lot of drilling. Typical types are HSS (high speed steel) and carbide. General purpose are porbably HSS...
by fmah
Sat Mar 27, 2004 9:03 am
Forum: CPU Cooling
Topic: Cooling chips using microscopic lightning!?!
Replies: 2
Views: 1180

by fmah
Sat Mar 27, 2004 8:53 am
Forum: Cases and Damping
Topic: Making screw holes?
Replies: 14
Views: 3275

The best thing is to have some resistance against the back of the surface you are drilling. So using wood is good since you can drill into wood without problems. Perhaps you can use bricks or something to raise the wood and push it against the surface. The best way to make precise holes is to use a ...
by fmah
Sat Mar 27, 2004 8:45 am
Forum: SPCR Article Discussion
Topic: Fanless Heatpipe CPU Cooling System by FMAH
Replies: 80
Views: 56454

What kind of motherboard are you using?

The typical maximum diameter I've seen is 6 mm. If you want to build them, that's a lot of work, but it could be interesting. I'm should be getting some pretty soon, so if you actually want some send me a private message (PM).
by fmah
Thu Mar 25, 2004 6:40 am
Forum: Fans and Control
Topic: Fan Controller that can read Voltage?
Replies: 9
Views: 2219

Perhaps just a good old analog VU meter kind of like what Coolermaster is starting to use now.

"old school" meter:

http://www.allelectronics.com/cgi-bin/c ... type=store
by fmah
Mon Mar 22, 2004 6:46 pm
Forum: Cases and Damping
Topic: Deltatronic Silentium! experiences?
Replies: 13
Views: 7560

According to the AMD spec 70 C is the max for Athlon 64 and 95 C for mobile version. So if that's correct, it's way too hot.
by fmah
Sun Mar 21, 2004 10:59 pm
Forum: The Silent Front
Topic: Silent Cluster computing
Replies: 10
Views: 2819

I don't think there is a power supply like that, well at least I'm not sure it would be practical to try something like that. But if you get some normal ATX units you will have larger quieter fans and temperature speed control on them. A tray would just be a shelf with the bottom and sides only. If ...
by fmah
Sun Mar 21, 2004 8:44 pm
Forum: The Silent Front
Topic: Silent Cluster computing
Replies: 10
Views: 2819

I'm thinking that the water pump will be pretty loud. Using a ~1/2 hp industrial pump which is only able to do about a few gpm, it's very loud. I assume these are 1U or maybe 2U cases? You could move the power supply outside the case and get low noise power supplies. Perhaps some kind of 80 mm fan s...
by fmah
Thu Mar 18, 2004 7:25 pm
Forum: Video Cards & Monitors
Topic: NVidia Quadro FX 700 - "silent cooling"?
Replies: 4
Views: 2421

I noticed this too, but I didn't see any pictures. However, the Quadro FX 500 is a board like the 5200, so the heatsinking is similar. I am assuming the 700 is a step above the 500 and probably capable of being cooled by a large heatsink. Of course without pictures, it's hard to tell.
by fmah
Sun Mar 14, 2004 3:41 pm
Forum: Cases and Damping
Topic: Why don't we see more bottom vents?
Replies: 27
Views: 7660

One of the biggest problems I've seen is that people will put them on carpet or other places with lots of dust. Then the unit sucks in all the dust and messes up the fans. However, if the height were enough that would probably be less of a problem, but for the typical user it can be trouble.
by fmah
Fri Mar 12, 2004 8:04 pm
Forum: CPU Cooling
Topic: Fanless 2000XP-M with heatpipe
Replies: 1
Views: 846

That would not be a thick enough piece of copper to transfer the heat. The cross section is way too small. You would need a cross section of probably 3 square inches to avoid overheat. I had initially thought of doing this, but I realized the copper part would need to be like 2 x 2 inches. That woul...
by fmah
Fri Mar 12, 2004 7:42 pm
Forum: CPU Cooling
Topic: The myth of "too much thermal paste"
Replies: 55
Views: 23368

I suppose Dell doesn't use thermal paste, but they must be using a thermal pad if not paste. The pads are quicker and easier to deal with for volume manufacturing. Really what you want is an ideal contact between the two surfaces, and just enough grease to fill any voids. If you put too much and don...
by fmah
Sun Feb 08, 2004 6:14 pm
Forum: SPCR Article Discussion
Topic: Fanless Heatpipe CPU Cooling System by FMAH
Replies: 80
Views: 56454

It's mainly a matter of what's available. I can get larger stuff but there are going to be some limitations concerning cost and availability.
by fmah
Fri Feb 06, 2004 8:12 pm
Forum: Fans and Control
Topic: Thermal switch in addition to voltage ramping?
Replies: 8
Views: 1805

I'm amazed that you were able to find that by the way. I have been searching for days for a page just like that. Where and how did you search? Russ This is a type of part I've seen at work. There are many brands and some might have the temp range you need. Combine this with a thermistor (variable r...
by fmah
Thu Feb 05, 2004 7:30 pm
Forum: Fans and Control
Topic: Thermal switch in addition to voltage ramping?
Replies: 8
Views: 1805

You should look at a passive thermal switch like below. Normally open then closes at a higher temperature. I assume this would work fine by just putting it in series with the fan and it will come on once the temp rises high enough. http://www.selcoproducts.com/cfm/ProductDetails.cfm?Action=Close&Sub...
by fmah
Sun Jan 25, 2004 5:28 pm
Forum: Fans and Control
Topic: Noncontact Infrared Thermometers
Replies: 9
Views: 2407

Well one thing to realize is that most of these units, except higher end ones, assume a fixed emissivity. I see normally it is assumed to be 0.95. Which means it is calibrated for measuring temperature on a surface such as a black anodized body. Measuring other items will be less accurate unless the...
by fmah
Fri Jan 23, 2004 7:47 pm
Forum: Cases and Damping
Topic: how are rack cabinets?
Replies: 3
Views: 1308

The metal on the racks tend to vibrate depending on how thick they are. Usually they are intended to function where no people normally work. The AC fans generally don't have any speed control (on or off). Closed door are likely to generate more of an echo sound if the speed is fast enough, although ...
by fmah
Mon Jan 19, 2004 7:27 pm
Forum: Power Supplies
Topic: Powering PC with Solar Energy /:)
Replies: 21
Views: 5404

These sites sell panels and how some info on them, although I don't know if any of them can generate 120V AC. You might be able to find something that will power a laptop. The system would work by charging a battery that will feed the power, otherwise, a passing cloud would just kill the energy sour...
by fmah
Sat Jan 10, 2004 12:03 am
Forum: Power Supplies
Topic: New fanless Antec 350W PSU
Replies: 35
Views: 12887

Hmmm, was waiting for something like this for my project. Looks good.
by fmah
Mon Jan 05, 2004 8:05 pm
Forum: Fans and Control
Topic: Useful fan configuration
Replies: 4
Views: 1879

Yeah, the case is quite useful.

I was measuring the voltage, but it seems to be pulsed so I couldn't get a steady read out. The max was around 4.2 V and the typical seemed to be 3.5 V.
by fmah
Fri Jan 02, 2004 10:08 am
Forum: Fans and Control
Topic: Useful fan configuration
Replies: 4
Views: 1879

It is a BX, so it's not the quiestest, but I haven't found the best 120mm fan yet, and I'm not spending time on that now. The main issue for 120mm fans is the clicking or scuffing sound, but it's okay in my config as the fan is on the side of the case away from me. Right now my hard drives are the l...
by fmah
Wed Dec 31, 2003 4:22 pm
Forum: Fans and Control
Topic: Useful fan configuration
Replies: 4
Views: 1879

Useful fan configuration

I've found the Noisemagic NMT-2 coupled with the Zalman fanmate to be very good. http://www.siliconacoustics.com/nmt2.html Since the NMT-2 only goes down to 5V, you can drop that down even more by adding a fanmate. I'm getting a 120mm Panaflo to run at around 450 rpm, which is the benefit of the ful...
by fmah
Wed Dec 31, 2003 4:17 pm
Forum: CPU Cooling
Topic: Aerodynamics question...
Replies: 9
Views: 2046

I believe that there were some designs for aircraft props which changed pitch of the blade. The pitch changed to either increase thrust which increased noise, or to decrease thrust and lower noise. If there were no pitch on the blade then you wouldn't get any (or very much) flow, but by angling the ...
by fmah
Wed Dec 24, 2003 3:25 pm
Forum: CPU Cooling
Topic: Hey guys, regarding passive Athlon cooling
Replies: 1
Views: 1011

The Zalman TNN-500A.

I'm working on something for the future.
by fmah
Wed Dec 24, 2003 5:53 am
Forum: SPCR's Folding@Home
Topic: Athlon64 folding
Replies: 4
Views: 1798

Athlon64 folding

Hmmm, wonder what a recompiled code could do on a Athlon64?
by fmah
Sun Dec 21, 2003 11:01 am
Forum: The Silent Front
Topic: Athlon 64 3000+ 512kb cache pretty good deal
Replies: 1
Views: 1031

Athlon 64 3000+ 512kb cache pretty good deal

Well apparently they are selling Athlon 64 3000+ with 512kb cache for a little over $200. That's half the price of the 1mb cache versions. Looks like AMD is really going to push 64 CPU's into the market. That seems like a good deal to me.
by fmah
Thu Dec 04, 2003 9:29 pm
Forum: Cases and Damping
Topic: Where to find thin plexiglass?
Replies: 2
Views: 1402

Look in the yellow pages for plastic suppliers. There are many plastic only places that will sell all types and cut them for you.
by fmah
Thu Dec 04, 2003 9:11 pm
Forum: The Silent Front
Topic: Pentium 4 Extreme Edition, expensive!
Replies: 31
Views: 7618

Well it will be interesting to see how much 64bit programs will improve with the Athlon 64.