A PC Case with External Power Supply?
aralin asks: "I am building a new home server (web server, email, source code repository, ...) and don't really need that much performance, but would like to make it ultra quiet. I have found some quiet, one platter harddrives and can get a lower-end graphics card without a fan. I underclock the CPU so it never really needs cooling, besides the load on the computer will be quite low, most of the time. What I cannot get around easily is the power supply. They are quite noisy and the quiet ones are really expensive. I'm just not going to put half of my budget on a power supply. Do you know any company that manufactures PC cases with external power supply or do you know any other cheap solution to a quiet PC?"
"So, I recently looked at the Mac Mini and it got me thinking, why couldn't PCs have an external power supply, like the Mac Mini or notebooks. Would it be so hard to make a case like that? It could be even smaller than the typical Mini-ITX cases, and with all the bricks from routers and external harddrives and other devices, I wouldn't mind one more lying around in exchange for the bliss of absolutely quiet PC in my bedroom."
well it depends on how much wattage, look how well the brick is doing for the power hungry xbox 360 ;)
I don't think you'll be saving money though... What *IS* your power supply budget there are quiet, or quieter power supplies that are good and quiet (or with a little ingenuity and bravery can be made quieter -- especially if the draw is low ) that aren't *that* much... Yes the totally passive/fanless ones are pricey.
I did a review of a casetronics c137 case with a via epia m10k mobo and it had a brick power supply (although there still was some power supply guts in the case and still had a fan!)
*shrug*
e.
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You can get an external power brick just like a laptop. Normal ATX connection, usually lower watts.
+++ UGUCAUCGUAUUUCU
You can get decent quality PSUs with 1 120mm fan in them for ~$100 these days.
$60 is quite reasonable and it's very quiet. Considering how little you'll be loading it, the fan will probably never reach past 20dB. That's basically silent from 4 feet away sitting on the floor next to a desk.
Your idea would require a LOT of wire running from the PS on the floor for the different voltages, and the PS would still have to be well ventilated and thus off the carpet. There isn't much of a market for your idea at a $40 price. The near-silent Zalmans and the fan-less supplies already have the higher price points covered.
Finally, some people do put their systems in a closet or adjacent room and drill holes for the cables. Not much point in only separating the PS if the hard drive will still make a miniscule amount of noise. People who care that much just move the whole system instead.
If put in a closet, it won't matter if it sounds much, and you shouldn't really be using it day-to-day anyway if it's a server. There are possibilities for remote admining on aswell Windows as *nix, so that shouldn't be a problem.
I have a really elegant proof for Fermat's last theorem. If this sig was only a bit longer...
Power supplies put out a lot of current at relatively low voltage. Typical power supplies use 18AWG copper wire on the pigtails going to the motherboard. At about 6.5ohms/1000' I figure about a .035V drop on a 1' pigtail with 4 +5V wires (5V @ 22A, an old PS I have here, at max load). If you just extended that to 15' you'd have 15x the drop, or about .5V. So your "5V" would be 4.5V, which is probably out of spec. The problem is worse at lower voltages or higher currents (I think the latest motherboards use mostly 12V partly for this reason).
You'd need a gang of 4+ 12ga or 10ga wires to keep the drop reasonable over a 15' distance. Now you're starting to see why power is distributed across the country at hundreds of thousands of volts, and newer cars are going to 24V or 48V systems.
Muuuch easier to get a supply with only one fan (no need for a 550wa monster for a small system!) and if necessary replace it with a quiet fan. I got some panaflos and replaced several of mine and they were silent.
Windows is like decaf - it tastes like the real thing, but it won't get you through the day.
I've often wondered, with as much small digital equipment as people have around their houses, why we don't run a general 12VDC and maybe a 5VDC line to every plug in the house besides the 120VAC.
It would certainly cut down on the number of wall-warts hogging outlets, besides fixing issues like these.
Direct away from face when opening.
Here's a photo tour. A small review. A larger review.
You also might want to ask on the forums at Silent PC review. There are people there who have a lot of experience building silent PCs and will be able to let you know if there is an external power supply that would fit your requirements.
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You get a good, quiet PSU with the case, and there is even a knob where you can set the fan speed. The hd are mounted on rubber washers, not directly on metal, so even at full spin they are not noisy. You also get a heat duct that drains the cpu heat outside the case.
The Sonata 2 ships with one 120mm fan, I advise you to add a second (plenty of sockets on the case). Big fans turn slowly, which is less noisy.
This is what I have at home, and if you unplug the blue leds there is no way to tell if the power is on unless you put your hand behind the psu fan.
This being said, I advise you to always put the psu at the top of your list when you buy a pc. Good, reliable power will give your hd a longer life.
lucm, indeed.
1. Stock el-cheapo PSU.
2. 80mm Vantec Stealth fan to replace original one. Maybe zalman has a standalone standard 80mm fan, which, if they do, probbably comes with a nifty little rheostat to control the RPM.
Problem solved. On a budget.
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I don't suppose google has been of any help, has it?
http://www.google.com/search?q=quiet+psu
I seemed to find a pretty quiet PSU pretty easy, dunno about you:
http://www.endpcnoise.com
Because while an external PSU might be cool, you're really only trying to solve the noise problem.
Kurdt
I'm not anti-social. Just pro-technology.
If you mean a Windows OS PC, you don't have a lot of options. You said you underclock your current "PC", so you don't need high performance. If you speak Linux, pick up an embedded box - like a gumstix.
e _at_night you're stuck with the hardware that MSFT offers.
If you're a gameboy and need a superfast_quiet_windows_pc_that_mom_wont_hear_lat
[ Please insert another coin to continue... ]
Don't think that a small group of dedicated individuals can't change the world. It's the only thing that ever has.
Probably the best PSU for your use is a Seasonic S12-330W. About $50, and coupled with a Antec 3000B or similar less than $80. If you want more powerful, I'd look at the Antec P150 with included NeoPower 430.
An external supply might still need a fan, plus the cabling will be a pain in the posterior.
Something you're also overlooking, the internal power supply's fan is part of the overall cooling system for the case and its contents. You'll still need a fan inside the case.
Back in the PC/XT days there was a case that needed some of the holes in the front covered up in order to increase the velocity of the air being pulled through the case by the internal power supply's fan in order to get enough cooling. It's all a system.
An internal supply with a quality quiet fan will probably have all its other components of a similar high quality, including big efficient heat sinks, and enough power output available (i.e., a low enough output impedence) that it'll probably be loafing along most of the time which means lower stress on its components and a longer life, so skimping on the power supply may well be false economy. A server needs to be stable and reliable. A first rate power supply is the first step towards that. A lot of what appear to be other hardware or software problems often turn out to be caused by a dodgy power supply.
I see even classic Slashdot is now pretty much unusable on dial up anymore.
I got sick of not having what you described, so I partnered with a company to make them. (obviously I have a commercial interest).
You can see one of our cases reviewed on EPIAcenter.com right now.. I think it's pretty close to what you want, and if it isn't, a few minutes on the phone can have it customized any way you want.
Boot off flash and NFS mount a partition to a server in another room and you have your perfectly silent PC.
The power supply is a hybrid; get a DC/DC converter from a company like mini-box.com, then get one of their external notebook-style power adapters.
..don't panic
Disclaimer: Don't do this unless you're pretty comfortable working with high voltages and large capacitors.
Disassemble the power supply. Unbolt the fan from the side. Reinstall it using longer bolts and a few rubber washers to hold the fan away from the side of the p/s case. Use foam tape to fill the gap between the fan and the case. Your power supply should now be significantly quieter.
I forget who, but somebody makes a silent power supply that has no fans, just a giant heat sink. It might not have enough wattage for a high-end gaming rig (dunno) but for your needs it's probably more than enough.
You mentioned Mini-ITX in your article... Have you looked AT ALL into products designed to be used with Mini-ITX boards? There are numerous ATX compliant power supplies that operate using DC/DC conversion and only need a single 12V input, and most vendors that sell such DC/DC power supplies (such as mini-box.com) also sell high-wattage 12V supplies too.
retrorocket.o not found, launch anyway?
Computer lacking a BIOS?
Take ten seconds (and I'm giving you way more time than any user with a clue should need) and think about what OpenFirmware is.
Yes, it's just another form of BIOS with a fancy name. (In fact, it happens to be more advanced than most typical PC BIOSes...)
retrorocket.o not found, launch anyway?
I believe the switching regulator is in the power supply, the "tips" just provide different voltage sensing resistors.
The way most switching power controller ICs work is that they continuously try to keep a voltage input equal to an internal reference voltage which is usually around 1.2 volts. To get higher voltages, a resistive voltage divider is used to sense the output voltage. For example, if one connected a 200k resistor between the output and the sense line, and a 100k resistor from the sense line to ground, then the output voltage would be 3.6 volts.
The nice thing about putting the divider network in the tip is that the power supply will now regulate the voltage that appears at the tip, AFTER any resistive losses between the switcher and the tip. (This works because the sense line going back to the switcher isn't carrying any current, only the output line.)
retrorocket.o not found, launch anyway?
I believe Soekris boxes will run off of a power brick. Compact Flash is typically used but a laptop hard drive might be used on them.
Shuttle's ST62K has an external power supply, and uses socket 478 cpus:
Review at Silent PC Review
Shuttle Product Page
$215 at Newegg
PC Power supplies are switching, and emit less heat with less load. Since youre not using much power in the first place, just open the power supply (DISCONNETED !!) and unplug the fan inside). Youll just need the additional budget of a screw driver... or the trouble of borrowing it.
I've powered PC motherboards using batteries before (not the harddisks)... they dont use much power. If the CPU power is low too, and you can make do with bootable USB key instead of harddisk, you might be able to just use two power adapters... 5V and 12V.
"Give orange me give eat orange me eat orange give me eat orange give me you." -Nim Chimpsky
Wouldn't an old notebook, sans fans, work perfectly for this?
Everytime you look at porn a devil gets their horns.
I've only owned SilenX's fans, but I'm EXTREMELY pleased with them. A 92mm 14dba fan and 120mm 14dba fan (~17dba combined) quieted my system considerably while actually lowering temps. I haven't tried their PSUs, but I'm expecting one any day now and have read plenty of great reviews of them.
http://www.mini-box.com/s.nl/sc.8/category.13/it.A /id.300/.f
Did a little looking around, since I know the Dell GX620 in it's ultra small form factor. I didn't read the manual, but it claims to be able to run most P4 boards up to 3Ghz.
You really can't beat the Seasonic S12 series. Extremely low noise (silent for most purposes under normal conditions), clean power, high-efficency (less heat / wasted power), active PFC (easier on the power lines), auto 120/240 voltage.
The S12 comes in a 330W version that should be fine for your PC. It runs around $55-$65 on the 'Egg or other online stores.
Pair it with a nice case (Antec 3000SLK or perhaps P180), a decent CPU heatsink (Scythe Ninja, Zalman, or a number of others), and a decent mobo/GPU (no fan), and a nice drive (Samsung is the best, Maxtor/Seagate/WD FDB drives can be pretty quiet as well), and you have a nice quiet system.
Check out http://silentpcreview.com/
http://www.elx.com.au/item/ELS1003?elx=1f17efed434 e93da647a378f0068385f
In general, low-voltage power supplies and long wires do not mix. One of the reasons that the power supply is inside the case is to keep the wires reasonably short. Even if you use larger gauge wires, excessive wire length can cause problems with voltage regulation.
Mea navis aericumbens anguillis abundat
$100 at Best Buy or Newegg for an Antec Sonata is cheap and easy. Or go out and buy a sheet or two of MDF, eggshell foam and build an enclosure with baffles and 120mm fans for intake and exhaust.
The only downside to the Sonata is Antec's stupid idea of extra "cooling" by perferating the top 4 inches of the sides of the case. Block these with foam or tape over them to attenuate the noise of humming (or shrieking) CPU and/or graphics card fans.
Here come da fudge!
The main limitation with these PSUs is the number of drives you can use. This Morex has only one connector for desktop optical and hard drives (and a couple of smaller connectors for floppy and mobile drives), but I've managed to use a HD and a DVDRW drive with a dual adapter. On the other hand, if you need more power, I think Morex makes these for up to 200 W.
Escher was the first MC and Giger invented the HR department.
Put it in another room and run extension cables. Seriously, nothing else will work.
Yup, that's right, full size cases with an external power supply. The "problem" was that the cable was relatively short - about 60-80 cm, if I recall correctly. A bit fuzzy about the details, but I think they were sold under the "Windy" name ... a Soldam company.
...
I am not an EE, and all that, but I think the main problem with having long low voltage wires is loss
"Consistency is contrary to nature, contrary to life. The only completely consistent people are the dead." A. Huxley
I use an old desktop PC to do this job. I salvaged it from an office. Hardware is:
This runs my email, internal web server, internal DNS and DHCP, file server, print spooler, version control, and so on. It never even notices the load from 3 concurrent users.
The Deskpro EN SFF has just one, small fan in the power supply. The Seagate drive is nice and quiet.
I am sat 1 metre from the machine as I write this, the rest of the house is silent, and all I can hear is a low whirring noise from the fan. The central heating radiator in the other corner of the room makes more noise.
Instead of trying to re-invent the wheel, buy yourself a used Compaq Deskpro. They're already ultra-quiet, and you don't need to get an external power supply for them. As performance isn't an issue, you can pick up a PIII for under $100, and just add whatever size HD you want - no need to piecemeal your machine together or pay through the nose for quiet.
Seriously, Deskpros are wonderful machines, especially if you like silence.
His definition of really expensive musy be anything over $25. Unless you are running a crazy sli cum RAID setup you shouldn't have to spend over $100. Vantec VAN-420 A is like $70 and if you are using minimum power like you say you are you can use the quiestest option. I guess for a $200 computer $75 would seem really expensive, but not out of line for a nice $700 setup
So basically you need a PC with a hard drive and a ethernet connection to be a silent web server, email server, repository, et al. You don't need a huge power supply, just something that can power those two items (maybe a CD or DVD drive).
You might as well go Mini-ITX, with the Via EPIA platform. They make small motherboards that fit anywhere (with on-board video and Ethernet) and direct-to-mobo 60W and 70W power supplies that only need a 12V external power supply brick. I have a EPIA V10000 that's running Gentoo Linux.
http://www.damnsmalllinux.org/ has a Mini-ITX store, and some ideas are at http://www.mini-itx.com/
--
# Canmephians for a better Linux Kernel
$Stalag99{"URL"}="http://stalag99.net";
My VIA Epia runs on an external power supply without any fans. IF you already got your computer (I did this and it worked): Buy a cheap power supply with enough wattage eg. if you have 1 or 2 drives and an underclocked system then I think an el-cheapo 500W power supply will do (30 of 40$). Open it up and disconnect the fan :-).
I do recommend however testing that out (by blocking the fan with a pen) and if it breaks you can always return it as to see if it doesn't explode after running a few hours at maximum power usage.
I do not guarantee that you will have your warranty or anything else (personal damage etc. etc. - read someones disclaimer) but I did it that way and the method is released under the GPL so don't patent it.
Custom electronics and digital signage for your business: www.evcircuits.com
I have what many would consider to be a noisy computer. However, when I am working on something, I don't even notice the noise. Why? Because I am concentrating. Is a quiet PS really THAT important or is it just another area in which one person is trying to out do the Jones'? I could understand if it where a home entertainment machine, but even then, just turn the volume up. Seems rather silly to me that so many home users spend so much time and energy on something that in the grand scheme of things, doesn't really matter. Now, if the PS were as loud as, lets say a lawnmower, then I might feel differently.
I've always had success with 7volts mod using 7 volt instead of 12 volt to power supply fan http://www.7volts.com/. PS is amazingly quiet and I didn't have to buy expensive PS.I've set up 7 volts for all the PS and CPU fans. However it's better to use rheostats and change fan speed according to the need.
http://www.up0.com/
Check out the power supplies manufactured by Fortron Source (FSP Group) at newegg. Just browse by manufacturer. They get rave reviews and I have yet to have a problem with any I have installed. The prices are very reasonable. Most of the product pages list the amperage on each of the outputs, so you can compare with the expensive models. Go with a model that uses a 120mm fan, and the sound difference is amazing.
I'm not sure if this is still true, but they used to sell models with a Potentiometer to adjust the fan speed. When turned down, the fan is silent. When turned all the way up, the fan is barely audible.
I think I read somewhere that Sparkle power supplies are made by the same manufaturer, but they run a few dollars more for equivelant models.
yes, that confused the hell out of me too when my ebay-bought car cigarette lighter->USB socket adaptor didn't charge my C500/HTC Tornado. despite many posts on t'internet to the contrary, it isn't anything to do with activesync, but rather that the phone needs 2 pins on the USB socket shorting together to charge. i *think* it was pins 4 and 5, but for the love of god don't just wire this up without checking: modaco has lots of information. in the end i bought another which was specifically stated as being C500 compatible and it works fine....
As mentioned in similar threads once long ago, the problem with that is circuit seperation and issues with a particular device bringing down many. Let's say your PC backcharges, and thus brings down or fries you other devices. Or perhaps the inverter itself bites it... I've had a whole PC worth of components bite the dust (drives, motherboard, etc) when a PSU decided to kick the dust bigtime... imagine that on a larger scale. In fact, that PSU ate it when another device was unplugged from the same bar, somehow backcharging through the supposedly protected power bar. Supposedly protected from the wall's end, anyhow.
The new Dell small form factor pc's our hospital is putting out (GX620) are exactly like what you're talking about. Huge laptop-style power brick, and the connection snaps on the back of the case with the same style plug that the PS normally snaps onto the motherboard. I know you're not looking to buy a new pc for your task, but still, this thing seems to be catching on to some extent.
Han shot first.
Subject says it all. They are quiet and reliable.
You have two choices other than dumpster diving - one is to buy really quiet components and other is go with fanless watercooling. I can tell you from experience that the fans make a really big difference. I usually buy the best fans I can afford and they usually run under 10-15 dB. It's hard to tell that stuff is even one, especially once you get the case buttoned up.
p - that one is well under 15dB.
. It works without a fan at all but is dependent on the case fan/cooling.
I have a case fan that I bought that runs at under 10dB - which less literally than a whisper. Keep the HDD and the CD/DVD drives quiet. Use a quiet power supply - yes, they make them - http://www.tweaknews.net/reviews/silenx/index2.ph
This link is to a quiet video card - http://www.endpcnoise.com/cgi-bin/e/zm80d-hp.html
This link is to fanless CPU cooler - http://www.overclockers.com/tips1218/ - uses a pump and water tank.
That means that you should be able to have your system built and running at no more than 30dB, if you choose your parts right, which is really really quiet. Closeted away, in a cabinet or some such, and you'll likely not even know it's on.
2 cents,
Queen B
HDGary secures my bank