Power Consumption and Thermal Performance

The power consumption at the wall was measured with a 1080p display being driven through the HDMI port. In the graphs below, we compare the idle and load power of the Zotac ZBOX MAGNUS EN970 with other low power PCs evaluated before. For load power consumption, we ran Furmark 1.12.0 and Prime95 v27.9 together. Despite consuming close to 19W at idle, the ZBOX MAGNUS EN970 actually happens to be the PC with the lowest idle power amongst all the discrete GPU-equipped machines that we have evaluated so far.

Idle Power Consumption

Load Power Consumption (Prime95 + FurMark)

The load power is also amongst the highest in the set of numbers that we have seen till now. However, the big separation between the idle and load powers indicate that the sytem can operate efficiently over a wide range of loading conditions.

Our thermal stress routine starts with the system at idle, followed by 30 minutes of pure CPU loading. This is followed by another 30 minutes of both CPU and GPU being loaded simultaneously. After this, the CPU load gets removed, allowing the GPU to be loaded alone for another 30 minutes. The various clocks in the system as well as the temperatures within the unit are presented below.

According to Intel's official specifications, the junction temperature of the Core i5-5200U is 105C. We find that pure CPU loading keeps the clock frequency half-way between the base frequency (2.2 GHz) and the maximum burst frequency (2.7 GHz). However, the temperature remains well below the junction temperature (around 82C). Getting the GPU into the equation ramps up the motherboard temperature as well as that of the GPU and GPU. However, the CPU remains below the junction temperature despite going up to as high as 102C. The GPU stabilizes around 81C.

HTPC Credentials Final Words
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  • watzupken - Monday, September 28, 2015 - link

    I am not sure if it makes sense to pair a decent graphic solution with a Ultra low power CPU to begin with. I believe the constraint is with the cooling solution, but I think I can live with a slightly bigger chassis.
  • firewall597 - Monday, September 28, 2015 - link

    I dunno, it seems like a compelling 1080p solution to me. I'm sure they put plenty of thought into their choice, between the pairing of CPU+GPU in such a small package, while also trying to reach a certain price point.

    Owning a SP3 with a pretty comparable 4300u, it's pretty impressive what it can do all things considered. Being paired with a 970m and put into a tiny $800 package is actually pretty enticing as an HTPC/Steam box solution for the living room.
  • barleyguy - Monday, September 28, 2015 - link

    Agreed. Most living room displays (TV/Projector) are 1080p, and this box performs very well at 1080p. It's small enough to put next to a TV, and should be very quiet as far as fan noise as well.

    I have an EN760 in my living room. It's an older version of this same box. It works great.

    My only complaint is that they raised the price from $500 to $800 (for the barebones) compared to previous generations. $500 was a more compelling price; $800 gets too close to laptop territory.
  • jameskatt - Thursday, October 1, 2015 - link

    Cheapness is why the PC market is dying.
  • SBD-3 - Saturday, October 17, 2015 - link

    Portability is why PC's are dying. People want it all in the palm of their hands.
  • LoganPowell - Friday, November 27, 2015 - link

    This is one expensive gaming desktop and its not even on the top rank (see http://www.consumerrunner.com/top-10-best-desktops... for example...). Not my first choice as there are better with lesser price on the market.
  • liebezeit - Monday, September 28, 2015 - link

    HTPC for $800? My repurposed Asus Chromebox I bought used for $75 works great for me...
  • SirKnobsworth - Monday, September 28, 2015 - link

    You wouldn't try any serious gaming on a Chromebox. Similarly, you wouldn't buy this if you just wanted to watch Netflix.
  • firewall597 - Tuesday, September 29, 2015 - link

    BUT CAN IT PLAY CRYSIS?
    This can.
  • QinX - Monday, September 28, 2015 - link

    Any reason as to why you didn't show the heatsink setup/MXM module?
    I'd be curious to see if you could squeeze in the new GTX980 MXM module in here, yes I know the 5200U is anemic for a GTX980.

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