Just realized I never linked this thread to the General Gallery thread of the final result: Small & Flexible: Back-of-LCD variable power consumption.

Now that I've run this system for the the better part of a year, I thought I'd write an update. Over- and under-clockability with 8rdavcore hasn't changed significantly since the graphs above. At first, the computer would only run at 1.25v (@ < 1.5GHz) after it had warmed up and even then would ofte...

Type "i-pod hearing damage" in a google search. Today I got 1,350,000 hits. Think there's not a problem here? ...and I get 500,000+ hits when I search for "microwave domestic animals". Your point? Bluefront makes good points that volume control could easily be built into portable devices such that ...

The point here is that by using your ipod to mask other noise, you have to increase the over-all noise level to which your ears are exposed. This isn't necessarily true, is it? Most headphones provide some attenuation, and especially in the case of noise-cancelling headphones the music volume could...

As far as I can tell, this is the new efficiency king for ultra-low-power setups. 81%+ @ 40W would be great for mini-ITX or undervolted/clocked Athlon XPs.

This has been mentioned, but I want to quantify it a bit - legislating a maximum sound output from a device doesn't necessarily affect the output dB. I don't know what the variation in headphones is, but loudspeaker sensitivity can vary from something 86 dB @ 1W & 1m to 98 db 1W & 1m. If I remember ...

MikeC wrote:This power brick + the Shuttle SD11G5 is already on the bench, running a test config. I guess I could try a 12V-only load test...

Ever try this, MikeC?

Even if you don't damage anything in the swapping process, you can be nearly sure that you've significantly reduced the operating life (and LCDs don't have anything near a CRT lifetime to begin with) Can you back up this statement about the lower lifespan of LCDs? I had always heard that LCDs shoul...

I've got the 60GB version, the MHT2060AH. It isn't silent - I can hear a very mild "shhh" when my panaflo's (80mm & 92mm) are at 5v, but they cover it up when I feed them any more voltage. It's quieter than any other hard drive I've owned, though, so I'm happy. Note, I've never had a Samsung Spinpoi...

I'm going to make a prediction here that you aren't going to have an easy time silencing that hardware. 1) That Athlon 1800+ will generate somewhere between 51W & 66W of heat at full load. Depending on exactly which Thermalright you bought, the heatsink should have no trouble with this amount of hea...

I've experimented quite a lot with 8rdavcore, and this is what I've found: 1) It tends to change speeds best when the RAM runs at 100% of FSB. 2) I can get the widest speed range if I boot at 133 MHz FSB. I can then adjust down to 57 MHz or up to 193 MHz. 3) The only inconsistency I've found is that...

Do you know of any boards/chipsets which allow change of multiplier in windows? What programs? CPUMSR and CrystalCPUID are the two I know of. It seems that CrystalCPUID is used mostly by those with the newer Athlon64 processors, but I think it works on other chipsets as well - poke around the site ...

Tibors - Actually, an additional benefit of the cable management box is that it adds ballast and helps balance the whole system by adding weight in the front & bottom to counteract the case mounted on the top & back. It's actually stable enough to right itself from about 30 degrees forward or backw...

I'm pretty sure that 8rdavcore now works with lots of boards that aren't on the compatibility list. My Biostar M7NCG 400 wasn't listed until I sent the author an email. Keep in mind that 8rdavcore can't adjust the multiplier, just the FSB, Vcore, and a few miscellaneous RAM & AGP settings. There are...

This is my new PC: http://home.cwru.edu/~pml3/images/back-of-lcd/bb-from_diag.jpg http://home.cwru.edu/~pml3/images/back-of-lcd/bb-from_side.jpg Origins: My last PC had a Celeron 566A permanently overclocked (through a broken pin) to 850 MHz and stuffed into a tiny flexATX case. It was a good little...

With haystack's permission, I'm posting this PM conversation we had, adding some pictures: I'm considering getting the SilverStone LC02 case, which you mentioned you had in another forum. I was wondering your thoughts on getting a very short, low profile AGP or PCI card into the chassis, as well as ...

My Biostar M7NCG 400 does work with 8rdavcore , but I haven't been able to get Vcore much lower than 1.3v. IIRC, I could get Vcore down to 1.2v at 54x5 = 270 MHz with Prime95 running, but if I stopped Prime95 it would lock up once the processor cooled down. Best I've been able to do rock-stable and ...

I've got the Silverstone Lascala SST-LC02 , and it might be a decent compromise between tower-style cases and the tiny Casetronics. It can take a full ATX motherboard (barely), has a decent power supply, and the build quality is excellent. Only issue I've had is airflow, but only when I clock my Mob...

That duct is sweet...wish I could do that to my LC02...

Keep us posted on your silencing efforts!

I've got a Mobile Athlon XP 2200+ that I've been able to run stably anywhere from 56x5 = 280 MHz @ 1.25v to 11.5x193 = 2220 MHz @ 1.8v, with a microATX board ( Biostar M7NCG 400 ) and an unproven 220W power supply. If I boot at 11.5x133, I can use 8rdavcore to adjust the FSB anywhere between 57 and ...

One fan won't draw more than an ampere, so almost any Radio Shack switch will be fine (don't worry about the voltage ratings - they're all fine for this). Use this one for 12v/5v or this one for 12v/off/5v.

Well, I got a diode (1N5817), and it works pretty much as planned. I found that I had to put the firewire drives on a different PSU cable from the boot drive to prevent the boot drive from spinning down with the sudden load. And the startup timing is also somewhat of an issue with the laptop DVD - I...

I think this would be a worthy goal. I've tried to find various information about power consumption here at SPCR, but most of it is hidden in corners of inconspicuous threads here and there. It would be great if we could develop some kind of data repository thread and let the statistical whizzes cru...

Almost identical post from less than two weeks ago: Manually Spin Down Drives from Windows?

My response:

Some threads that may be of use:

Shut off noisy hard drives in Win XP?
How to switch drives on & off
Power management to quieten hard disk

I've got a Panaflo 92mm on an SLK-900A, and it works fine. Don't see any reason why the closed corners on the Nexus would cause a problem.

sthayashi : Thanks for the informative post. Let me see if I can clarify this circuit for you... The devices I want to switch between are a 3.5" Maxtor HDD (not the boot drive) and a laptop DVD combo drive. The HDD needs both 5V & 12V, while the DVD drive and firewire bridge need only 5V power. The...

If you look at Power Supply Fundamentals & Recommended Units , you'll see that 180W DC is the largest power draw SPCR has measured...and that's with a P4 3.2GHz w/ 2 3.5" HDDs and an ATI9800XT. So you really don't need more wattage. That being said, higher-quality power supplies tend to have higher ...

What are you powering that needs so much muscle? In my experience, it's hard to put enough stuff in a microATX case to require more than ~250W. Especially quietly.

If I were to go with a relay, I assume I would need a dual-pole verson. Otherwise, the wires from each side of the switch would still be connected to the same contacts and both drives would be powered up. I'm inclined away from relays because they're big, more expensive and often mechanically-based ...

Okay, so I found this page with some background on diodes: AmericanMicroSemi Diode Tutorial . This page leads me to believe that Qwertyiopisme is right - I'm looking for a diode with a low voltage drop, or Vf, at 500mA (the highest current I would expect the bridge to draw). The reverse breakdown vo...