It is currently Wed Oct 01, 2014 4:39 am

All times are UTC - 8 hours




Post new topic Reply to topic  [ 12 posts ] 
Author Message
 Post subject: Mini-ITX server power supply question
PostPosted: Fri Aug 03, 2012 12:19 pm 
Offline

Joined: Sat Jul 28, 2012 6:41 pm
Posts: 4
I've this server that I built and am planning to use for various tasks (web hosting, building my programs, etc..). Am trying to reduce the noise level a bit as it has gotten quite annoying, and was looking at replacing the crappy PSU that came with the case with a PicoPSU. I did actually look into replacing the fan in the current PSU, but because it's a non-standard size, I haven't actually been able to find one from a place that looked even remotely reputable.

Specs are:
2.6GHz Core i3 2120T (stock clock, and voltages as I don't see a point to fiddling with them)
8GB DDR3 RAM (with the possiblity of a future upgrade to 16GB)
2x 2.5in mechanical hard drives
ASUS P8H61-I motherboard

I'm also looking at replacing one of the spinning hard drives with a 128GB SSD. (possibly either a samsung or crucial one, which ever is the cheapest)

My question is: Will a 120W PicoPSU and 120W adapter be enough to power this machine, at sustained levels of moderate to high load?


Top
 Profile  
 
 Post subject: Re: Mini-ITX server power supply question
PostPosted: Sat Aug 04, 2012 8:51 am 
Offline

Joined: Thu Jul 03, 2008 4:27 am
Posts: 1728
Location: Switzerland
Yes, it'll be more than enough... a lot more than enough actually (don't waste your cash if you can get a smaller pico for less and especially if you've got a smaller brick lying around you could reuse).


Top
 Profile  
 
 Post subject: Re: Mini-ITX server power supply question
PostPosted: Sat Aug 04, 2012 3:33 pm 
Offline

Joined: Sat Jul 28, 2012 6:41 pm
Posts: 4
HFat wrote:
Yes, it'll be more than enough... a lot more than enough actually (don't waste your cash if you can get a smaller pico for less and especially if you've got a smaller brick lying around you could reuse).

How much smaller are we talking? The next smallest is 90 something isn't it? I would think that to not be enough.


Top
 Profile  
 
 Post subject: Re: Mini-ITX server power supply question
PostPosted: Sun Aug 05, 2012 6:52 am 
Offline

Joined: Thu Jul 03, 2008 4:27 am
Posts: 1728
Location: Switzerland
90W or 80W should be more than enough as well. 60W might be dicey however. Check people's power consumption measurements.
Note that I'm assuming this is going to be a server (no charging batteries or warming coffee from the USB ports).


Top
 Profile  
 
 Post subject: Re: Mini-ITX server power supply question
PostPosted: Sun Aug 05, 2012 7:12 am 
Offline
*Lifetime Patron*

Joined: Thu Feb 13, 2003 6:53 am
Posts: 1525
Location: Sweden
A picoPSU-90-XLP and a 60W brick would be enough I think. That's what powers my file server.

With many HDDs and a 60W brick that i3 2120T would make sense (the reason for me getting a i3 2100T) but otherwise you might as well go with a non-T part.

A picoPSU-90-XLP and a 80W brick powers my i5 3570K system btw. These CPUs are quite efficient.

If low power consumption is a priority, go with an Intel board instead. They cost a little bit more but they are more efficient than the Asus boards. MSI is cheaper and usually also good, but not quite as good as the Intel boards.

_________________
Main: ASRock B85M-ITX | i3-4330 | 16GB DDR3 | Intel 730 240GB | HDPLEX H1-S | picoPSU | No moving parts | Idle 13.9W
HTPC: ASRock H81M-ITX | Pentium G3420 | 4GB DDR3 | Intel 520 120GB | HDPLEX H1-S | picoPSU | No moving parts | Idle 11.2W
Gaming: Intel DH77EB | i5-3570K | GTX 750 Ti | 16GB DDR3 | Intel 520 120GB | TJ08-E | G-360 360W
Server: Intel DH77DF | i3-2100T | 4TB+3x3TB | picoPSU | Idle 24W AC


Top
 Profile  
 
 Post subject: Re: Mini-ITX server power supply question
PostPosted: Sun Aug 05, 2012 5:06 pm 
Offline

Joined: Sat Jul 28, 2012 6:41 pm
Posts: 4
Vicotnik wrote:
A picoPSU-90-XLP and a 60W brick would be enough I think. That's what powers my file server.

With many HDDs and a 60W brick that i3 2120T would make sense (the reason for me getting a i3 2100T) but otherwise you might as well go with a non-T part.

A picoPSU-90-XLP and a 80W brick powers my i5 3570K system btw. These CPUs are quite efficient.

If low power consumption is a priority, go with an Intel board instead. They cost a little bit more but they are more efficient than the Asus boards. MSI is cheaper and usually also good, but not quite as good as the Intel boards.


Well the priority was more low noise, than low power consumption.

HFat wrote:
90W or 80W should be more than enough as well. 60W might be dicey however. Check people's power consumption measurements.
Note that I'm assuming this is going to be a server (no charging batteries or warming coffee from the USB ports).


Yes definitely going to be a server. No charging batteries or coffee warming, but maybe the rare USB flash drive for when the server needs to be repaved.

Also thanks everyone for suggestions. I think I will be looking in to using a 90 watt pico instead of the 120 i was originally looking at.


Top
 Profile  
 
 Post subject: Re: Mini-ITX server power supply question
PostPosted: Sun Aug 05, 2012 6:18 pm 
Offline

Joined: Thu Feb 04, 2010 6:06 pm
Posts: 3395
Location: US
rstat1 wrote:
Will a 120W PicoPSU and 120W adapter be enough to power this machine, at sustained levels of moderate to high load?
The 2120T is potentially 35W. Add another potential 25 to 40 watts for the board. See:
http://www.silentpcreview.com/article1200-page5.html

You are up to 75 watts. While the advice others have given you is valid, you indicated is was sound, not power that was your primary concern.

I would use a 120W PicoPSU for a margin of safety. It will likely deliver perhaps 100 watts. That extra capacity will be a handy safety margin in the event you in the event that a run away process inadvertantly loads your computer to 100% over night when you aren't looking.

I would also consider the largest SPCR approved heatsink you can find that will fit easily in your case, and use it with a single 500 rpm Scythe Slipstream. Or a Scythe mugen 2 with it standard PWM slipstream would be cost effective. The fan will never tick past 300 rpm. If you are tight for space, any of the downdraft Noctua, even the smallest, will work just fine as well.

_________________
= = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = =
"Aristotle calls man the rational animal. All my life I have been seeking evidence to confirm this" Bertrand Russell
"Only two things are infinite, the universe and human stupidity, and I'm not sure about the former" Albert Einstein


Top
 Profile  
 
 Post subject: Re: Mini-ITX server power supply question
PostPosted: Sun Aug 05, 2012 6:24 pm 
Offline

Joined: Thu Feb 04, 2010 6:06 pm
Posts: 3395
Location: US
Vicotnik wrote:
A picoPSU-90-XLP and a 80W brick powers my i5 3570K system btw
The 80 watt brick may end up delivering 70 watts. The 3570K in theory is capable of absorbing 77 watts all by itself. Isn't that cutting a a bit tight... in the case of an unexpected runaway process... say?

_________________
= = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = =
"Aristotle calls man the rational animal. All my life I have been seeking evidence to confirm this" Bertrand Russell
"Only two things are infinite, the universe and human stupidity, and I'm not sure about the former" Albert Einstein


Top
 Profile  
 
 Post subject: Re: Mini-ITX server power supply question
PostPosted: Sun Aug 05, 2012 7:52 pm 
Offline

Joined: Sat Jul 28, 2012 6:41 pm
Posts: 4
ces wrote:
rstat1 wrote:
Will a 120W PicoPSU and 120W adapter be enough to power this machine, at sustained levels of moderate to high load?
The 2120T is potentially 35W. Add another potential 25 to 40 watts for the board. See:
http://www.silentpcreview.com/article1200-page5.html

You are up to 75 watts. While the advice others have given you is valid, you indicated is was sound, not power that was your primary concern.

I would use a 120W PicoPSU for a margin of safety. It will likely deliver perhaps 100 watts. That extra capacity will be a handy safety margin in the event you in the event that a run away process inadvertantly loads your computer to 100% over night when you aren't looking.

I would also consider the largest SPCR approved heatsink you can find that will fit easily in your case, and use it with a single 500 rpm Scythe Slipstream. Or a Scythe mugen 2 with it standard PWM slipstream would be cost effective. The fan will never tick past 300 rpm. If you are tight for space, any of the downdraft Noctua, even the smallest, will work just fine as well.


I've actually been doing some experimenting, and found that the stock Intel fan seems to be sufficient in terms of sound and cooling performance when set at the "Quiet" setting in the BIOS. Especially in the cheap case I have that amplifies all the noise. I figure a better case probably would make it even better.


Top
 Profile  
 
 Post subject: Re: Mini-ITX server power supply question
PostPosted: Sun Aug 05, 2012 11:23 pm 
Offline
*Lifetime Patron*

Joined: Thu Feb 13, 2003 6:53 am
Posts: 1525
Location: Sweden
ces wrote:
The 80 watt brick may end up delivering 70 watts. The 3570K in theory is capable of absorbing 77 watts all by itself. Isn't that cutting a a bit tight... in the case of an unexpected runaway process... say?

No, the 80W brick can deliver 80W and it's a high quality brick. The TDP of 77W is not reached in any practical scenario.
Besides, right now I underclock a little bit, but that is to get the temperature down a little bit not because of any power concerns.

_________________
Main: ASRock B85M-ITX | i3-4330 | 16GB DDR3 | Intel 730 240GB | HDPLEX H1-S | picoPSU | No moving parts | Idle 13.9W
HTPC: ASRock H81M-ITX | Pentium G3420 | 4GB DDR3 | Intel 520 120GB | HDPLEX H1-S | picoPSU | No moving parts | Idle 11.2W
Gaming: Intel DH77EB | i5-3570K | GTX 750 Ti | 16GB DDR3 | Intel 520 120GB | TJ08-E | G-360 360W
Server: Intel DH77DF | i3-2100T | 4TB+3x3TB | picoPSU | Idle 24W AC


Top
 Profile  
 
 Post subject: Re: Mini-ITX server power supply question
PostPosted: Mon Aug 06, 2012 6:07 am 
Offline

Joined: Thu Feb 04, 2010 6:06 pm
Posts: 3395
Location: US
Vicotnik wrote:
ces wrote:
The 80 watt brick may end up delivering 70 watts. The 3570K in theory is capable of absorbing 77 watts all by itself. Isn't that cutting a a bit tight... in the case of an unexpected runaway process... say?

No, the 80W brick can deliver 80W and it's a high quality brick. The TDP of 77W is not reached in any practical scenario.
Besides, right now I underclock a little bit, but that is to get the temperature down a little bit not because of any power concerns.
I guess that depends on if we are talking input watts or output watts. Even the best bricks are going to lose 10% of the input watts by the time the electricity reaches the output.

_________________
= = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = =
"Aristotle calls man the rational animal. All my life I have been seeking evidence to confirm this" Bertrand Russell
"Only two things are infinite, the universe and human stupidity, and I'm not sure about the former" Albert Einstein


Top
 Profile  
 
 Post subject: Re: Mini-ITX server power supply question
PostPosted: Mon Aug 06, 2012 12:10 pm 
Offline

Joined: Tue Oct 04, 2005 6:10 am
Posts: 371
Isn't this stuff specified in terms of output capacity?


Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 12 posts ] 

All times are UTC - 8 hours


Who is online

Users browsing this forum: No registered users and 4 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  
Powered by phpBB © 2000, 2002, 2005, 2007 phpBB Group