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 Intel NUC6i7KYK (Skull Canyon) with other low power PCs evaluated before. For load power consumption, we ran Furmark 1.12.0 and Prime95 v27.9 together. The idle number is a bit disappointing, though, I assume that a change in the BIOS to the low power profile could help improve things. Otherwise, the idle number is just slightly higher than what is typical for a system with a 45W TDP CPU and a PCIe M.2 SSD.

Idle Power Consumption

Load Power Consumption (Prime95 + FurMark)

The load power number in the graph above is the maximum sustained value. As we can see from the graphs below, instantaneous peak numbers can go as high as 95W. Addition of bus-powered USB devices will also tend to drive up this number further.

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.

The graph below present the power consumption profile of various blocks in the CPU package during the course of our thermal stress. Following that, we have the power consumption at the wall for the system during the same period.

According to the official specifications, the junction temperature of the Core i7-6770HQ is 100 C. Unfortunately, the cooling solution is not able to prevent the CPU from hitting it with turbo speeds activated. However, the frequency does remain above the base 2.6 GHz throughout the pure CPU loading segment. The package power settles down to a steady 45W, and that continues throughout the duration of our test. Our only concern is that the cooling solution keeps the temperature of the cores too close to the junction temperature during periods of heavy CPU load. Once the load gets distributed across both the CPU and the GPU, we see the package come down to around 90C.

Another important aspect to keep note of while evaluating mini-PCs is the chassis temperature. Using the Android version of the FLIR One thermal imager, we observed the chassis temperature after the CPU package temperature reached the steady state value in the above graph.

We have additional thermal images in the gallery below.

The maximum chassis temperature observed by the thermal imager was slightly above 60 C near the fan's exhaust vent. At that point, a sound level Android app running on the HTC One M7 recorded 59 dB. For comparison purposes, the Zotac ZBOX MAGNUS EN970 recorded 50 dB in a similar scenario.

HTPC Credentials Miscellaneous Aspects and Concluding Remarks
POST A COMMENT

133 Comments

View All Comments

  • fanofanand - Monday, May 23, 2016 - link

    So in other words, another 20 mm gives the customer a 50% haircut on price. Yup, more evidence this is a product in search of high margins and little else. Reply
  • jwcalla - Monday, May 23, 2016 - link

    You have to understand that Intel thinks its customers turn on their faucets and liquid gold comes pouring out. Reply
  • Shadowmaster625 - Monday, May 23, 2016 - link

    So its not even as fast as an ancient R9 270M despite being two nodes ahead.... and the power advantage is only 30%. Intel has a problem it seems. Reply
  • ganeshts - Monday, May 23, 2016 - link

    Did you consider the power budget? Reply
  • extide - Monday, May 23, 2016 - link

    Are you kidding? That is actually a pretty damn good achievement, I mean that uses a Cape Verde ASIC, and has about 1TFLOP of compute power, (640 shaders @ ~750 Mhz)

    The Iris Pro 580 has 576 FP32 cores (72 EU * 8) and runs about 1Ghz, so has a bit over 1.1TFLOP compute -- so really pretty similar in terms of compute horsepower. It seems like it is performing right where it should based on it's hardware config.
    Reply
  • fanofanand - Monday, May 23, 2016 - link

    Well, looks like I will be waiting yet another generation. Still can't game on 1080p. I like the storage and Wi-Fi numbers, and I can picture this doing fairly well in some office environments, but are there that many people who are building home PC's (user still has to add RAM etc.) and who will pay that kind of a premium for a device that is somewhat limited in it's use case? I can't speak for anyone else of course, but there is no way my employer would fork out $1k for this, not when they can spend $400 on a cheap business laptop that takes up a similar amount of space in the office but also offers them the ability to extract additional work from me over the weekend. I love the idea, I just don't think the hardware is there yet. Reply
  • Taracta - Monday, May 23, 2016 - link

    How is Alpine Ridge going to get USB 3.1 if it is not off the PCH? Reply
  • ganeshts - Monday, May 23, 2016 - link

    Alpine Ridge has a USB 3.1 host controller integrated along with the Thunderbolt controller. Please look into our Thunderbolt 3 hands-on coverage here: http://www.anandtech.com/show/10248/thunderbolt-3-... : Note the presence of the xHCI controller in the Alpine Ridge block diagram towards the middle of the linked page. Reply
  • tipoo - Monday, May 23, 2016 - link

    This makes me wish Intel offered GT4e with a cheaper dual, then it could compete with boxes like the Alienware Alpha on price/value. Reply
  • tipoo - Monday, May 23, 2016 - link

    Does this support free sync? Reply

Log in

Don't have an account? Sign up now