Fanless 300/350w PSU with High Efficiency

mark.carline

Novice Member
Can anyone here recommend a fanless High Efficiency PSU for a PC ?

Ones I have found so far include:

SilverStone ST30NF
http://www.silverstonetek.com/products-ST30nf.htm

Silentmaxx Fanless 400W ATX PSU
http://www.pro-clockers.com/article.php?id=124

Antec Phantom 350
http://www.antec.com/us/productDetails.php?ProdID=24350
http://www.silentpcreview.com/article188-page1.html

My PC isnt using very much power so i guess I could do with a lower power one but I thought High Efficiency would do. My PC only has the following items in it:

- ASUS N4L-VM DH
- Core 2 Duo Merom T7200 (ES)
- Hauppauge NOVA-T-500 (PCI Card)
- Microsoft USB IR MCE Receiver
- Maxtor SATAII 300Gb drive
 

GLP1

Novice Member
The SST-ST30NF worKs faultlessly in my 24/7 mCubed hFX

Gavin
 

mark.carline

Novice Member
Just been reading up on these PSUs and....

Option 1 - SilverStone ST30NF
more reviews here:
http://www.dvhardware.net/review67_sst-st30nf.html
http://www.silentpcreview.com/article185-page1.html

quote:
The Good Stuff
- Dead silent
- Voltages were good, but 12V line suffered a bit during load.
- Has two Serial ATA power cables
- Six Molex connectors (the previous PSU from SilverStone that I tested only had 4 Molex connectors)

The Bad Stuff/Things that could be better
- Possibly heat issues if the other cooling in your case is inadequate.
- Very expensive.

ATX12V V1.3 Intel PSU Guide compliance - One standard behind, latest is 2.03; does not support PCI Express
Arrrgg - Looks like this PSU doesnt support PCI Express !!

Option 2 - Silentmaxx Fanless 400W ATX PSU
http://www.pro-clockers.com/article.php?id=124

quote:
The PSU has a 99% power factor correction and has a high efficiency design of 89%
Looks good but 400W is way too over the top.

Option 3 - Antec Phantom 350
http://www.antec.com/us/productDetails.php?ProdID=24350
http://www.silentpcreview.com/article188-page1.html
http://pcpartsreview.com/forums/lofiversion/index.php?t76.html

quote:
Ultra-high-efficiency circuitry (at least 85% efficiency)
...There is a very small amount of coil buzzing that becomes audible (to me) when the PSU is less than two feet away. It measures perhaps 15 dBA/1m or less...
...I have the Antec Phantom 350w, there is a slight buzzing...
Option 2 is ruled out as 400W is over the top and I dont need that much, option 3 sounds a bit dodgy due to this coil buzzing and efficiency isnt as high as the others. Option 1 is looking like the best but not sure what it means about "PCI Express" compatability.

Anyone know of any others that are worth considering (that have 80% or more efficiency) ??

Scan seem to be selling a slightly different model called the "ST230NF" (one above is the "ST30NF") - anyone know what the difference is ?

http://www.scan.co.uk/Products/ProductInfo.asp?WebProductID=137420

I have also discovered that I should be looking for an ATX 2.0 supply for my my ASUS N4L-VM DH as this provides 24 pin connector as compared with my old QTechnology 20 pins connector (wonder if thats why my machine never worked in S3 mode), see this note:

http://www.extremetech.com/article2/0,1697,1949509,00.asp
http://tomshardware.co.uk/2004/12/23/more_performance/index.html
 

mark.carline

Novice Member
...cont... gulp!! just read this about the Silverstone ST30NF fanless PSU:

http://forums.silentpcreview.com/viewtopic.php?t=15765

quote:

The PSU case definitely gets very hot. Even after about 3 hours, if you put your hand on the top cover, its not really possible to keep your hand there for more than about 5 seconds. After about 10 hours, it?s enough to give you a very mild burn if you hold your hand there long enough.
he is drawing *alot* from this PSU though:

My PC specs are:-

Athlon XP 2500+ oc?d to 3200+/2.2ghz @ 1.775v
2 x 256mb PC3200 dimms
Nvidia Geforce 4 Ti4200 128mb
1 x SoundBlaster Live PCI card
2 x optical drives
3 x 7200rpm HDDs
1 x FDD
4 x fans (2 x Nexus 120mm @ 7v, 2 x Panaflo 80mm @ 5v)
 

shezzy2k

Member
What case are you using?

I also have the Silverstone ST30NF in an mCubed HFX and it's utterly reliable.

Please note the following...
  1. It does support PCI Express & comes with the connector as standard.
  2. The model available at Scan is the same PSU...looks like a typo on their part (This PSU only delivers 230w in the USA becasue the the voltage).
  3. The PSU has both a split 24pin connector which can also be used on 20pin mobos.
  4. The PSU case is designed to get hot as the internal heatsinks are connected to the external case, nothing to worry about IMHO.

I personally wouldn't touch the other two PSU's & I did a lot of research before taking the plunge.

Your choice...
 

mark.carline

Novice Member
shezzy2k said:
What case are you using?
I'm using an ACCENT HT-101G (gold) as per:
http://www.arisetec.com/products/HT-101.htm

shezzy2k said:
The PSU case is designed to get hot as the internal heatsinks are connected to the external case
Hmm - dont think I can attach the PSU to the case (there will be a small gap all the way round but I guess I could put some metal plates in between the PSU and the case.

I am hoping that with the system i am using that as its not drawing very much power that the knock on effect (with a high efficient PSU) is that the PSU will be cooler.
 
S

SmudgerSmith

Guest
I have a ST30NF in a CLARITAS 340M case with an Aopen i915GMm-HFS motherboard and Pentium M 1.73. The PSU is always cool to touch (the only fan in the system is a tempature conrtollled CPU fan which rarely comes on)
 

shezzy2k

Member
mark.carline said:
I'm using an ACCENT HT-101G (gold) as per:
http://www.arisetec.com/products/HT-101.htm



Hmm - dont think I can attach the PSU to the case (there will be a small gap all the way round but I guess I could put some metal plates in between the PSU and the case.

I am hoping that with the system i am using that as its not drawing very much power that the knock on effect (with a high efficient PSU) is that the PSU will be cooler.
Mark,

Sorry, I don't think I was clear in my statement. When I stated "external case" I meant the aluminium body of the ST-30NF PSU. There are internal heatsinks inside the PSU which are bonded to the PSU casing to transfer & dissipate heat.

I cannot see you having any problems with the components you have.

I hope this helps.
 

mjn

Distinguished Member
FSP Zen, 300W fanless, and 86% efficient.
 

mark.carline

Novice Member
The silverstone turned up ok but it looks as though my original fears have been confirmed. The only other fan I have in my system is the CPU fan which adapts its speed depending on the temp of the CPU. With my old QTechnology PSU the CPU fan used to run at 800 rpm and was virtually inaudiable.

With the silverstone now being fanless the heat from the psu seems to be dissopated around the metal case and its knock on effect is to raise the temperature of the internal components and the CPU. This then causes the temperature of the CPU to raise to around 60C and thus the fan speed on the CPU raises to 2000rpm. The overall effect is that the noise created by the cpu fan spinning at 2000rpm is higher than that of combined cpu fan noise running at 800rpm and the qtechnology 12cm fan.

I switched the machine into "Away Mode" and left it for a couple of ours and as per the following link:

http://forums.silentpcreview.com/viewtopic.php?t=15765

and quote:

The PSU case definitely gets very hot. Even after about 3 hours, if you put your hand on the top cover, its not really possible to keep your hand there for more than about 5 seconds. After about 10 hours, it?s enough to give you a very mild burn if you hold your hand there long enough.
I could only put my hand on the back of the PSU for around 5-6 seconds before it started to hurt.

Any thoughts anyone ?

Looks like i'll be going back to the QTechnology 350w supply at this rate !

UPDATE Just swapped the Silverstone back for my QTechnology and its been on for a few hours and the overall noise is ALOT quieter now. The Silverstone will be on ebay from 7pm tonight at 0.99p no reserve if anyones interested. It works fine - just it heats up my CPU fan too much.
 

shezzy2k

Member
Mark,

I'm sorry to hear of your problems with the PSU, I've tried a few & IMHO the Silverstone is definitely one of the best.

If you are having heat problems with that fanless PSU, then I fear you will have a problem with almost all of them because they all generate heat...well the ones I've tested anyway.

You may be better off with a semi passive like the Nesteq PSUs.

www.nesteq.de/

I believe that some forum members also own these, so do a search & see what pops up.

Also I would try & return the Silverstone under the distance selling & cooling off regulations. You should be able to recoup more of your outlay than on Ebay.

Good luck with your next move!
 

mark.carline

Novice Member
I think the Silverstone works fine as it doesnt get really really hot its just perhaps over the top for my system. I didnt think about the fact that running a fanless psu in my case means that theres going to be more heat inside my case and so a knock on effect is that the cpu gets hotter and the cpu fan gets faster.

I got it from ebay 2nd hand anyway so I dont really have the option to send it back. I'm sure i'll get back what I paid for it (maybe more ;))

Anyway - Plan B now, see this thred:

Low power (150w) PSUs for ATX PC (ASUS N4L-VM DH)
 

mark.carline

Novice Member
I know.....darn.

Effectivly I am trying to build a laptop system in a desktop style case

I have a feeling that the Silverstone PSUs are perhaps not as efficient as the manuals say that they are.

The laptop I am using at work (Dell D610 spec here) has a 19.5v / 4.62A power supply (90W) supply and this laptop or PSU brick isnt very hot at all.
 

neilneil

Novice Member
Can you not place the PSU in a box of it's own OUTSIDE the pc and then run extender cables into the PC. That way the heat generated by the psu is not going into the pc.

-Neil
 

mark.carline

Novice Member

mark.carline

Novice Member

eeek

Active Member
If molex is what you are after look at the cubid itx cases (which usually include the psu). These are usually cheaper than the psu would be by itself. I have two running silently (one powering a small database and asterisk server), the other acting as a slimserver.
 

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