Getting the Best out of an Ivy Bridge HTPC: Windows 8, madVR and More..
by Ganesh T S on January 20, 2013 3:00 PM EST- Posted in
- Home Theater
- Intel
- HTPC
- Ivy Bridge
- Windows 8
- Passive Cooling
HTPC Decoding and Rendering Benchmarks: EVR / EVR-CP
In our Ivy Bridge HTPC review, we had covered the CPU / GPU utilization during playback of various types of clips. In the Vision3D 252B review, we had graphs of CPU and GPU loading with various renderers and codecs. Unfortunately, AMD doesn't provide similar data / sensors for use with their APUs. Hence, we had to resort to power consumed at the wall along with GPU loading in the Trinity HTPC review. In order to keep benchmarking consistent across all HTPC reviews, we started adopting the Trinity HTPC review methodology starting with the review of the ASRock Vision HT.
The tables below present the results of running our HTPC rendering benchmark samples through various decoders when using the Enhanced Video Renderer / Enhanced Video Renderer (Custom Presenter) (EVR / EVR-CP). Entries in bold indicate that there were dropped frames which indicate that the unit wasn't up to the task for those types of streams. Fortunately, none of the streams presented any problem to the system and there were no dropped frames. The recorded values include the GPU loading and power consumed by the system at the wall when playing back the streams using MPC-HC v1.6.5.6366 and LAV Filters 0.54.
Enhanced Video Renderer (EVR)
The Enhanced Video Renderer is the default renderer made available by Windows 8. It is a lean renderer in terms of usage of system resources since most of the aspects are offloaded to the GPU drivers directly. EVR is mostly used in conjunction with native DXVA2 decoding.
| LAV Video Decoder (DXVA2 Native) + EVR | ||
| Stream | GPU Usage % | Power Consumption |
| 480i60 MPEG-2 | 24.05 | 35.04 |
| 576i50 H.264 | 21.38 | 36.06 |
| 720p60 H.264 | 26.13 | 36.6 |
| 1080i60 H.264 | 28.9 | 39.95 |
| 1080i60 MPEG-2 | 28.19 | 37.06 |
| 1080i60 VC-1 | 31.23 | 45.57 |
| 1080p60 H.264 | 30.11 | 37.09 |
The GPU is not taxed much by the EVR despite hardware decoding also taking place. Deinterlacing and other post processing aspects were left at the default settings in the Intel HD Graphics Control Panel (and these are applicable when EVR is chosen as the renderer)
Enhanced Video Renderer - Custom Presenter (EVR-CP)
EVR-CP is the default renderer used by MPC-HC. It is usually used in conjunction with MPC-HC's video decoders, some of which are DXVA-enabled. However, for our tests, we used the DXVA2 mode provided by the LAV Video Decoder.
| LAV Video Decoder (DXVA2 Native) + EVR-CP | ||
| Stream | GPU Usage % | Power Consumption |
| 480i60 MPEG-2 | 26.69 | 38.78 |
| 576i50 H.264 | 24.43 | 37.88 |
| 720p60 H.264 | 32.76 | 40.4 |
| 1080i60 H.264 | 40.16 | 42.02 |
| 1080i60 MPEG-2 | 39.75 | 41.62 |
| 1080i60 VC-1 | 40.99 | 48.45 |
| 1080p60 H.264 | 41.33 | 42 |
In addition to DXVA2 Native, we also used the QuickSync decoder developed by Eric Gur (an Intel applications engineer) and made available to the open source community. It makes use of the specialized decoder blocks available as part of the QuickSync engine in the GPU.
| LAV Video Decoder (QuickSync / DXVA2 Copy-Back) + EVR-CP | ||
| Stream | GPU Usage % | Power Consumption |
| 480i60 MPEG-2 | 27.16 | 38.42 |
| 576i50 H.264 | 25.26 | 38.05 |
| 720p60 H.264 | 36.84 | 41.6 |
| 1080i60 H.264 | 44.2 | 43.41 |
| 1080i60 MPEG-2 | 44.32 | 43.02 |
| 1080i60 VC-1 | 43.56 | 43.26 |
| 1080p60 H.264 | 48.28 | 45.13 |
In general, using the QuickSync decoder results in a higher power consumption because the decoded frames are copied back to the DRAM before being sent to the renderer. Using native DXVA decoding, the frames are directly passed to the renderer without the copy-back step. The odd-man out in the power numbers is the interlaced VC-1 clip, where QuickSync decoding is around 5W more efficient compared to 'native DXVA2'. This is because there is currently no support in the open source native DXVA2 decoders for interlaced VC-1, and hence, it is done in software [Clarification: This restriction is only on Intel GPUs. On both AMD and NVIDIA cards, DXVA2 native decode acceleration is supported for all VC-1 streams]. On the other hand, the QuickSync decoder is able to handle it with the VC-1 bitstream decoder in the GPU.
Facebook
Twitter
RSS
138 Comments
View All Comments
dcaxax - Tuesday, January 22, 2013 - link
Also, not everyone has a super smart TV. I have a 55" Sony series 9 (hx923). It's one of the best TVs money can buy (especially for may visual tastes), but it's smart platform sucks.I don't like to depend on a dumb machine which is what I consider TV's for things I can do 10 times better on a PC. and I've not seen a single "smart tv" platform that didn't suck monkey balls as far as usability, speed and interface design...
Fx1 - Tuesday, January 22, 2013 - link
I can watch any kind of video i like. Even embedded videos in a web browser. Easy way is to go to the website on my phone and then hit one button and within 2 seconds its playing on the TV. I download All the TV i want to watch from torrents. with Netflix and Sky TV im pretty much coveredTouche - Tuesday, January 22, 2013 - link
First of all, it's a fully functional PC vs extremely limited TV/small media player. That right there is difference enough. Media, gaming, productivity, limitless customization...As for media capabilities, there is no match for things HTPC players, renderers, filters, codecs...provide regarding compatibility, picture quality, filtering, smoothness, per file refresh matching/switching, library organization, future proofing...
Fx1 - Tuesday, January 22, 2013 - link
The only real difference is price. You pay serious money for stuff thats actually not relevant. Im playing blu ray quality 50gb movies with DTS HD sound in 1080p. You cant get any better than that!. Upscaling is a joke. you cant polish a turd. Its still crap quality video and its always going to look crap. You dont need a PC to work that out. Also upscaling is as good as it gets on a panasonic TV. Your PC might have good software but it wont beat the dedicated hardware built into a TV. Its a bit stupid to build a PC to watch standard Def. its like a 4k gaming PC to play diablo 2.Quite honestly my Macbook Pro would be more capable and powerful than any of your HTPC's and i can take the Mac out the house when i need to. Dedicated HTPC really is just a hobby and excuse to build a PC.
Touche - Tuesday, January 22, 2013 - link
Yes, you can. Chroma upsampling, per source refresh matching, playback-refresh perfect sync... LOL on the TV hardware vs PC software.Tell the majority of the world how improving SD as much as possible is stupid.
I don't get the Macbook joke. At least I hope it's a joke.
I'll get back to PC gaming on my living room tv now. I guess Macbook and Panasonic can do that better too.
Fx1 - Wednesday, January 23, 2013 - link
Sorry you lost all credibility when you told me that you play games with a PC on your TV.This is 2013 and Standard def has no place in my home or even my PHONE!.
You do realise that a Macbook Pro has a i7 CPU and a 650M GT GPU inside? You can also install Windows and basically you dont need a separate box to do the things you claim you need to do.
How long do you think its going to be until there is wireless display tech? then your HTPC is doomed. Because people can just use their normal PC or Laptop to do basically what you spent all that money building a dedicated device for.
Touche - Wednesday, January 23, 2013 - link
Thank you captain obvious, I would never have realized that things will be somewhat different once wireless display tech gets improved.You do realize that your Macbook essentially becomes a HTPC when you hook it up to the TV? The very same thing you're dissing, though more expensive and limited.
Also, it is nice of you to selectively disregard advantages even your limited usage scenario would see, and concentrate on dissing anything not of use to you or not up to your "2013" standard (what a lousy teenage girl thing to say, btw).
I hope you can grasp the idea that many people have usage scenarios you don't, and have a great need and benefit from HTPC.
Touche - Wednesday, January 23, 2013 - link
Oh, and as for the Macbook, it needs Windows to be as useful and capable as HTPC, at which point you're better of with a much cheaper laptop. And even then, as many HTPCs are doing something 24/7, or while you're away etc., it makes no sense to use a laptop. Hence the joke.Yes, yes, YOU don't need anything that doesn't come with MacOS, and YOU don't use anything HTPC related, or use it more than X hours a week, and YOU don't...so it's all just useless and nobody should have it.
Fx1 - Thursday, January 24, 2013 - link
First of all a HTPC is basically an underpowered limited use box sitting under your TV. This is the point. Just about every other device now does what a HTPC does without actually having to have a separate PC. A Laptop a home desktop a phone, tablet or smart TV will do 95% a dedicated HTPC will do 95% as good. They really are going to go the way of the dodo. ExtincteXces - Sunday, January 20, 2013 - link
i would definitely pick Mediaportal over XBMC or jriver