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 Post subject: Haswell Low Power Builds
PostPosted: Wed Oct 23, 2013 6:00 am 
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Joined: Mon Aug 09, 2010 9:59 am
Posts: 17
Location: USA
Hi all,

As a follow up to my thread for ivy bridge (viewtopic.php?f=28&t=64635), I want to ask you guys what's the lowest idle/total power consumption builds you have seen using Haswell. Please include kill-a-watt readings!

I've been reading that MSI B85M-P33 is a low power performer. Does it beat Intel's DH87RL or DB85FL? It is a shame that Intel didn't release a Mini-ITX version (update the DH77DF)... I guess it is part of intel gradually leaving the Mobo business?


I hope to see builds in the 10-20 watt idle range.


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 Post subject: Re: Haswell Low Power Builds
PostPosted: Sun Dec 22, 2013 1:06 am 
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Joined: Sun Sep 28, 2003 10:28 am
Posts: 69
Asus Q87T
8GB Crucial 1.5v SO-DIMM
Intel i3 4130T
Samsung EVO 840 120GB SSD
Intel 7260 AC + Bluetooth
Cooler Master SNA 90 power adapter

running Windows 7, with realtek Gb LAN in use, WLAN enabled (in scanning mode, not connected to a SSID), and HDMI hooked up I see the following readings:

idle: 16W
normal use: 20-28W
prime95: 41W
prime95 + furmark: 51W

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 Post subject: Re: Haswell Low Power Builds
PostPosted: Fri Dec 27, 2013 3:37 am 
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Joined: Fri Dec 27, 2013 3:34 am
Posts: 1
FrankL, what are the power figures as a torrent box? do you have c6/c7 power states activated?


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 Post subject: Re: Haswell Low Power Builds
PostPosted: Fri Dec 27, 2013 10:25 am 
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Joined: Sun Sep 28, 2003 10:28 am
Posts: 69
kucho wrote:
FrankL, what are the power figures as a torrent box? do you have c6/c7 power states activated?


I'm not going to test this, but an educated guess would be that the consumption would be in the 20-25W range with HDMI, WLAN and GB-Lan active and some torrents transferring in the lower single-digit Megabyte per second range (say below 50Mbps).

As far as c6/c7: how can one tell they're being used? They're set to 'auto' in the BIOS, and the machine is running Windows 7 Home Premium.

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 Post subject: Re: Haswell Low Power Builds
PostPosted: Sun Feb 09, 2014 11:45 pm 
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Joined: Sun Sep 28, 2003 10:28 am
Posts: 69
FrankL wrote:
kucho wrote:
FrankL, what are the power figures as a torrent box? do you have c6/c7 power states activated?


I'm not going to test this, but an educated guess would be that the consumption would be in the 20-25W range with HDMI, WLAN and GB-Lan active and some torrents transferring in the lower single-digit Megabyte per second range (say below 50Mbps).

As far as c6/c7: how can one tell they're being used? They're set to 'auto' in the BIOS, and the machine is running Windows 7 Home Premium.


Figures for another system, this time the configuration is:
*4-5 year old Nexus Value 430 PSU
*Intel G1820
*MSI H81M-P33
*1x 8GB 1.5v DDR3 DIMM

power figures at wall:
Idle: 19W (usb thumbdrive with Debian Wheezy Linux + USB Keyboard & Mouse)
Load: 38W (running two instances of burnP6)

I've confirmed that C6 is working. Models that are cheaper than the Core i3 line do not contain the C7 state however.

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 Post subject: Re: Haswell Low Power Builds
PostPosted: Tue Feb 11, 2014 9:39 pm 
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Joined: Tue May 10, 2011 8:10 pm
Posts: 8
Kill-a-Watt readings of the following system:

IWill SH-55 mini-ITX PC case
ASUS H81T/CSM motherboard
Core i3-4130 CPU
Gelid Slim Silence i-Plus CPU cooler
Crucial 1 x 8GB DDR3-1333 SO-DIMM
Samsung 64GB mSATA
Internal USB IR receiver
19V 4.74A Anker AC adapter

Windows 7 desktop (nothing running, just sitting idle, a minute of so after boot): 14.8W
Watching 1080p MKV: 19.9W-20.3W
Prime-95: 53.8W
Idle with screen automatic off (sat for 30min but not in sleep): 9.8W
Sleep: 1.4W

What impressed even more were temperatures. Under normal usage, 30-40C and Prime95 in the low 60sC. I've never seen temps that good in such a small case.

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