Power Consumption

Before proceeding to the business end of the review, let us take a look at some power consumption numbers. The G.Skill RAM was set to DDR3 1600 during the measurements. We measured the average power drawn at the wall under different conditions. In the table below, the Blu-ray movie from the optical disk was played using CyberLink PowerDVD 13. The ISOs were mounted using Windows 8's in-built mounting tool. Prime95 v27.9 and Furmark v1.10.6 were used for stress testing. Blu-ray ISO ripping was done using AnyDVD HD v7.2. The Prime95 + Furmark benchmark was run for 1 hour before any measurements were taken. Power consumption numbers for local file playback using various renderer / decode combinations has already been covered in a previous section. The testbed was connected to a Wi-Fi network (and the GbE port was left unconnected) throughout the evaluation. In all cases, a wireless keyboard and mouse were connected to the testbed.

Haswell HTPC Testbed Power Consumption
Idle 25.94 W
Sleep 1.38 W
Prime95 v27.9 + Furmark 1.10.6 (Full loading of both CPU and GPU) 85.68 W
Prime95 v27.9 (Full loading of CPU only) 73.79 W
1080p24 H.264 Blu-ray Playback from ODD 34.5 W
1080p24 VC-1 Blu-ray Playback from ODD 33.21 W
1080i60 VC-1 Blu-ray Playback from ODD 34.37 W
1080p24 VC-1 Blu-ray ISO Streaming from NAS 30.91 W
1080p24 H.264 MVC Blu-ray ISO Streaming from NAS 32.67 W
Blu-ray Rip to ISO from ODD 36.41 W

The following screenshots gives an idea of how the integrated GPU and the CPU share the thermal headroom. In the first case, we have full CPU loading and no load on the GPU.

The CPU package power is around 47 W, with the IA cores alone consuming around 37 W. The second screenshot shows the transition from purely full CPU loading to full CPU and GPU loading. The CPU package power rises from 47 W to around 54 W. The GPU is consuming around 18 W, while the IA cores go down to around 27 W.

QuickSync Gets Open Source Support, Regresses in Quality Concluding Remarks
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  • jhoff80 - Sunday, June 2, 2013 - link

    This article and the power consumption stats just make me wish that Intel would just make it easier to get a hold of their -T chips for end users. A 35W or 45W chip would be great for me, but the only thing that has full retail availability is the 65W one. (And it's not because it's so early in launch, it's always been way too difficult to get -T versions.)
  • EnzoFX - Sunday, June 2, 2013 - link

    Not to mention expensive! You get the same results by undervolting/underclocking, typically.
  • Laststop311 - Monday, June 3, 2013 - link

    You are correct in a way but you could undervolt the T series as well and get better thermal performance then the 65 watt version. atleast that is my experience. If i was making an HTPC i would use the i7-4770t or the i7-4650t if thats the equivalent of the i7-3770t this year. The power consumption is amazing and proper 24hz is great for 1080p24 playback. upgrade to the htpc just isn't in my budget right now and ivy bridge + gt 660 isnt a bad htpc. MY PC budget is going to an ultrabook upgrade this year. The increased battery life and performance is insane. i7-980x desktop still does not have a large enough upgrade to make it worth it. Ivy bridge-E is not THAT much faster and I dont think even haswell-e next year will be enough to upgrade the desktop.
  • Death666Angel - Tuesday, June 4, 2013 - link

    "but you could undervolt the T series as well and get better thermal performance then the 65 watt version."
    Not to the same extent. The T series will already be driving much tighter voltages than normal SKUs. While you may save 15% power consumption by undervolting normal SKUs, undervolting already power efficient SKUs would result in sub 5% probably.
  • vnangia - Sunday, June 2, 2013 - link

    Well, it helps that there are 35W parts this time around - at least on the timeline. IVB didn't get any 35W parts, so the HTPC is still on SNB, and yeah, I could definitely use the incremental improvements to QuickSync.
  • jhoff80 - Sunday, June 2, 2013 - link

    Yes, but I'm not talking about only 35W specific chips. The i7-3770T was just as difficult to get as any other -T series chip, because they don't sell them to end-users directly.
  • vnangia - Sunday, June 2, 2013 - link

    I'm agreeing with you! What I was trying to say is, Intel did announce low-TDP SNB parts and delivered: SNB had a bunch of -T versions available to end-users at both low (G4xx, G5xxT, 2100T, 2120T) and high end (2390, 2500T). I bought my 2100T at Microcenter B&M for instance.

    By contrast, Intel didn't announce any end-user -T (and just a handful of -S) parts and we saw that IVB had virtually no -T parts available. I'm optimistic that now they've announced a few -T parts at the high end, we might actually see these materialize in the retail chain and hopefully it bodes well for -T parts at the low end.

    Fortunately (*knocks on wood*) the current SNB-based HTPC is still going strong, so I don't feel the need to upgrade. If and when I do, though, I expect that it won't be so clear cut - I may end up going with AMD's lineup, despite the relative paucity of AMD ITX boards.
  • jhoff80 - Monday, June 3, 2013 - link

    Sorry, I must've misunderstood.
  • Krysto - Monday, June 3, 2013 - link

    This is insane. Why use a $400 Intel Haswell media box for 4k video, when you can use the much cheaper and much more efficient Mali T622-based media boxes that should be appearing next year?

  • NirXY - Monday, June 3, 2013 - link

    "should be appearing next year"

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