It is currently Fri Sep 19, 2014 10:05 pm

All times are UTC - 8 hours




Post new topic Reply to topic  [ 4 posts ] 
Author Message
 Post subject: Oversized PSU an issue?
PostPosted: Sun Sep 14, 2008 1:44 am 
Offline

Joined: Sun Sep 14, 2008 1:04 am
Posts: 175
Location: Australia
I'm looking at buying a new case that comes with a 430W PSU (Antec NSK6580) - the PSU is an EarthWatts, so it has an 80 PLUS rating.

I calculated (using Antec's PSU calculator) that the most I'm every likely to require is about 300-340W depending on how many HDDs I might use in future - given the efficiency of the PSU, am I going to be using more electricity than I might be if I used a smaller PSU (e.g. 380W)?

Just not sure as to how efficient PSUs are when they're only running at say 50%.


Top
 Profile  
 
 Post subject:
PostPosted: Sun Sep 14, 2008 1:55 am 
Offline

Joined: Sat Aug 02, 2008 5:39 am
Posts: 29
Location: Denmark
Typically PSU's are most efficient at around 50% load.

http://www.80plus.org/manu/psu/psu_repo ... Report.pdf


Top
 Profile  
 
 Post subject:
PostPosted: Sat Oct 04, 2008 6:48 am 
Offline

Joined: Sat Oct 04, 2008 3:29 am
Posts: 96
Location: Edinburgh
That's definitely not oversized.

Anything over 20% of the PSUs capacity is fine. Your PSU would be oversized only if you spent most of your time below that 20%, so if it idles at over 86W you have nothing to worry about.

My own PC idles at just under 40W, but oh the difficulty of finding a decent 200W PSU... I'm considering running the monitor off the PCIe power cable instead of its own power brick.


Top
 Profile  
 
 Post subject:
PostPosted: Sat Oct 04, 2008 1:21 pm 
Offline

Joined: Fri Aug 05, 2005 3:29 am
Posts: 1180
Location: UK
Moon GT wrote:
My own PC idles at just under 40W, but oh the difficulty of finding a decent 200W PSU...


As you are in the UK there is always LinITX.com, see

http://linitx.com/viewproduct.php?prodid=10916

for example.


Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 4 posts ] 

All times are UTC - 8 hours


Who is online

Users browsing this forum: Yahoo [Bot] and 1 guest


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