It is currently Fri Dec 26, 2014 12:09 am

All times are UTC - 8 hours




Post new topic Reply to topic  [ 11 posts ] 
Author Message
 Post subject: PSU for a 60W PC. Any advices?
PostPosted: Mon Jun 02, 2014 2:01 am 
Offline

Joined: Thu Dec 12, 2013 8:49 am
Posts: 18
Location: Italy
Hi all.

My current system is an Asus H87I-PLUS motherboard, I5-4670, two 2.5 HDDs. The actual power consumption, measured on the power cord, is between 20W and 60W (cpu full load).
I would like dismiss the case's noisy PSU (Thermaltake SD101) for something really quiet. I'm thinking about an extenal brick PSU, 80W - 100W, but I have no experience with this kind of power supplies applied to desktop machines so I'm not aware about their drawbacks, if any.

Is this a good idea?


Top
 Profile  
 
 Post subject: Re: PSU for a 60W PC. Any advices?
PostPosted: Mon Jun 02, 2014 2:05 am 
Offline
*Lifetime Patron*

Joined: Thu Feb 13, 2003 6:53 am
Posts: 1544
Location: Sweden
A picoPSU with a good 80W brick (or maybe even 60W but that might be cutting it close) would work fine.

_________________
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: PSU for a 60W PC. Any advices?
PostPosted: Mon Jun 02, 2014 8:26 am 
Offline
*Lifetime Patron*

Joined: Wed Aug 09, 2006 6:10 pm
Posts: 122
Location: Columbus, Ohio
I'm very interested in your power numbers. Is that 60 watts under load with
all four cores busy? Any undervolting?

I have used picoPSUs in my last two machines and am very happy with them.
Look for a level V power brick for best efficiency.

_________________
E7500, Zotac GF9300-I-E, Lian-Li Q03b, picoPSU-150-XT, 4GB DDR2-800, 128 GB Samsung 830 SSD, 500GB 2.5" Hitachi Travelstar, XUbuntu 14.04 64-bit
My blog ...


Top
 Profile  
 
 Post subject: Re: PSU for a 60W PC. Any advices?
PostPosted: Mon Jun 02, 2014 10:20 am 
Offline

Joined: Thu Dec 12, 2013 8:49 am
Posts: 18
Location: Italy
Yes, 60W with 4 cores fully loaded, running at 3400Mhz, and the noisy 180W power supply. No undervolting, just BIOS defaults.
This cpu can go up to 3800Mhz, reaching its 84W TDP (I suppose), but I don't know how to unlock this "turbo" mode and I don't care.

What I find interesting is that 4 cores running full-load limited at 800Mhz raises the power consumption only to 22-24W. And the processing power is still quite good!

Using a 7 years old (but good quality) 450W ATX psu the power consumption goes up to 34W (idle) and 76W (loaded).

One question: can I use a 20-pin PicoPSU plugged into a 24-pin ATX connector?


Top
 Profile  
 
 Post subject: Re: PSU for a 60W PC. Any advices?
PostPosted: Mon Jun 02, 2014 10:38 am 
Offline
*Lifetime Patron*

Joined: Wed Aug 09, 2006 6:10 pm
Posts: 122
Location: Columbus, Ohio
Yes, my first picoPSU system was a 20-pin pico into 24-pin ATX connector.

_________________
E7500, Zotac GF9300-I-E, Lian-Li Q03b, picoPSU-150-XT, 4GB DDR2-800, 128 GB Samsung 830 SSD, 500GB 2.5" Hitachi Travelstar, XUbuntu 14.04 64-bit
My blog ...


Top
 Profile  
 
 Post subject: Re: PSU for a 60W PC. Any advices?
PostPosted: Tue Jun 03, 2014 12:05 pm 
Offline

Joined: Thu Dec 12, 2013 8:49 am
Posts: 18
Location: Italy
It seems that 20-pin picoPSUs don't have the 4-pin separated plug for the cpu power connector. This means that I must choose a more powerful 24-pin picoPSU?

Could you suggest a reliable european online shop?


Top
 Profile  
 
 Post subject: Re: PSU for a 60W PC. Any advices?
PostPosted: Tue Jun 03, 2014 12:49 pm 
Offline
*Lifetime Patron*

Joined: Wed Aug 09, 2006 6:10 pm
Posts: 122
Location: Columbus, Ohio
There are adapter cables to convert a molex connection to the 4-pin CPU
connection, such as http://www.mini-box.com/4-Pin-P4-Power-Cable.
Molex Y-splitters are easy to find.

Or you could consider the picoPSU-150-XT or picoPSU-160-XT which do have
P4/CPU connector already. The higher capacity picoPSU won't affect your
power efficiency much; the choice of power brick is more important.

I don't have any experience with European suppliers as I live in the U.S.

_________________
E7500, Zotac GF9300-I-E, Lian-Li Q03b, picoPSU-150-XT, 4GB DDR2-800, 128 GB Samsung 830 SSD, 500GB 2.5" Hitachi Travelstar, XUbuntu 14.04 64-bit
My blog ...


Top
 Profile  
 
 Post subject: Re: PSU for a 60W PC. Any advices?
PostPosted: Tue Jun 03, 2014 12:50 pm 
Offline

Joined: Wed Jun 13, 2007 10:12 am
Posts: 3248
Location: ITALY
LogicSupply is (just) one.

_________________
Regards,
Luca


Top
 Profile  
 
 Post subject: Re: PSU for a 60W PC. Any advices?
PostPosted: Wed Jun 04, 2014 10:43 am 
Offline

Joined: Thu Dec 12, 2013 8:49 am
Posts: 18
Location: Italy
I'm going to buy these:

http://www.logicsupply.eu/power-supplie ... su-150-xt/
and
http://www.logicsupply.eu/power-supplie ... 12v10a-l5/

thank you for your hints!


Top
 Profile  
 
 Post subject: Re: PSU for a 60W PC. Any advices?
PostPosted: Wed Jun 04, 2014 11:13 am 
Offline
*Lifetime Patron*

Joined: Thu Feb 13, 2003 6:53 am
Posts: 1544
Location: Sweden
Should give you plenty of headroom, good choice.

_________________
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: PSU for a 60W PC. Any advices?
PostPosted: Fri Jul 04, 2014 3:23 pm 
Offline

Joined: Thu Dec 12, 2013 8:49 am
Posts: 18
Location: Italy
I received the package, and immediately installed the new power supply.

18W idle, and the power brick is... almost cold.
59W full load @3400MHz, and only the cpu fan is spinning up. I like it!

Thank you for your suggestions. Bye!


Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 11 posts ] 

All times are UTC - 8 hours


Who is online

Users browsing this forum: Yahoo [Bot] and 3 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