Intel's Ivy Bridge: An HTPC Perspective
by Ganesh T S on April 23, 2012 12:01 PM EST- Posted in
- Home Theater
- Intel
- HTPC
- Ivy Bridge
Before proceeding to the business end of the review, let us take a look at some power consumption numbers. The G.Skill ECO 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 12. The Prime95 + Furmark benchmark was run for 1 hour before any measurements were taken. The MKVs were played back from a NAS attached to the network. The testbed itself was connected to a GbE switch (as was the NAS). In all cases, a wireless keyboard and mouse were connected to the testbed.
| Ivy Bridge HTPC Power Consumption | |
| Idle | 37.7 W |
| Prime95 + Furmark (Full loading) | 127.1 W |
| Blu-ray from optical drive | 57.6 W |
| 1080p24 MKV Playback (MPC-HC + QuickSync + EVR-CP) | 47.1 W |
| 1080p24 MKV Playback (MPC-HC + QuickSync + madVR) | 49.8 W |
The Ivy Bridge platform ticks all the checkboxes for the average HTPC user. Setting up MPC-HC with LAV Filters was a walk in the park. With good and stable support for DXVA2 APIs in the drivers, even softwares like XBMC can take advantage of the GPU's capabilities. The QuickSync decoder and DXVA decoder are equally efficient, and essential video processing steps such as cadence detection and deinterlacing work beautifully
For advanced users, the GPU is capable of supporting madVR for most usage scenarios even with slow memory in the system. With fast, low-latency DRAM, it is even possible that madVR can be used as a renderer for the most complicated streams. More investigation needs to be carried out to check the GPU's performance under different madVR algorithms, but the initial results appear very promising.
Does this signify the end of the road for the discrete HTPC GPU? Unfortunately, that is not the case. The Ivy Bridge platform is indeed a HTPC dream come true, but it is not future proof. While Intel will end up pleasing a large HTPC audience with Ivy Bridge, there are still a number of areas which Intel seems to have overlooked:
- Despite the rising popularity of 10-bit H.264 encodes, the GPU doesn't seem to support decoding them in hardware. That said, software decoding of 1080p 10-bit H.264 is not complex enough to overwhelm the i7-3770K (but, that may not be true for the lower end CPUs).
- The video industry is pushing 4K and it makes more sense to a lot of people compared to the 3D push. 4K will see a much faster rate of adoption compared to 3D, but Ivy Bridge seems to have missed the boat here. AMD's Southern Islands as well as NVIDIA's Kepler GPUs support 4K output over HDMI, but none of the current motherboards for Ivy Bridge CPUs support 4K over HDMI.
- It is not clear whether the Ivy Bridge GPU supports decode of 4K H.264 clips. With the current drivers and LAV Filter implementation, 4K clips were decoded in software mode. This could easily be fixed through a driver / software update. In any case, without the ability to drive a 4K display, the capability would be of limited use.
Discrete HTPC GPUs are necessary only if one has plans to upgrade to 4K in the near term. Otherwise, the Ivy Bridge platform has everything that a HTPC user would ever need.
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Midwayman - Wednesday, April 25, 2012 - link
Have you ever seen a 4k display on a uncompressed signal? The clarity is just astounding.I'm more concerned about the ability to deliver content with that kind of bandwidth requirements. We already get hdtv signals that are so compressed that they're barely better than a really really good SDTV signal.
MobiusStrip - Friday, April 27, 2012 - link
Most of what you see labeled "HD" (or variants thereof) is marketing bullshit. You're not getting HD when the bitrate is 3 megabits per second, especially when anything on the screen is moving.You can blow a VHS picture up to "HD" resolution, and it won't be HD. That's exactly what's happening in most consumer devices today.
"4K" is rapidly emerging as the next fraud. We'll see the same crap blown up to 3840 x whatever (barely even 4K by any standard), but containing 1K of real resolution if you're lucky.
The era of increasing quality is over, as consumers prove over and over that they don't care about quality.
A5 - Monday, April 23, 2012 - link
"Otherwise, the Ivy Bridge platform has everything that a HTPC user would ever need."I'd like an open-source (or at least) free encoder that supports QuickSync and not having to be picky with my DRAM purchase to use GPU-accelerated decoders before I say that.
Other than that, it seems to be good enough for the basic HTPC functionality - can't wait for the new i3s and Pentiums to see if the low-end parts are good enough!
ganeshts - Monday, April 23, 2012 - link
You can use GPU accelerated decoders even with DDR3-1333 DRAM. You need to go high speed / low latency only if you want rendering through madVR.Use QuickSync Decoder or DXVA2 Native in LAV or MPC Video Decoder + EVR-CP to get full decode and rendering acceleration without worry about the DRAM.
babgvant - Monday, April 23, 2012 - link
DVRMSToolbox (DTB) has included a QS capable transcoding solution for over a year. The main benefit to using it vs. the other retail options is that it supports EDL files during transcoding.DTB is FOSS, the QS dlls are just FSS.
A5 - Monday, April 23, 2012 - link
Cool stuff. Hadn't heard of your tool before today, I'll make sure to check it out when I get my HDHR Prime from Woot.shawkie - Monday, April 23, 2012 - link
I've experimented with madVR a bit but in the end the problems with playing back DVDs and Blu-rays with menus has so far stopped me from using it seriously. However, I've seen reports claiming that Ivy Bridge includes higher quality upscaling within Windows Media Player (as part of the EVR I suppose). Any evidence of this?ganeshts - Monday, April 23, 2012 - link
You can take a look at the PowerDVD chroma upscaling screenshots linked in the text. I was really surprised at the quality (until I zoomed to 300%, I couldn't actually decipher the difference between PowerDVD and madVR!). Similar behavior with MPC-HC using MPCVideoDec.Btw, can you link me to the reports that you mention?
shawkie - Monday, April 23, 2012 - link
http://www.intel.com/content/www/us/en/architectur...This was one of them. I also found a comment from one of the engineers that explained that they were using a higher quality upsampling algorithm too but I can't find it now.
ganeshts - Monday, April 23, 2012 - link
Andrew @ MissingRemote just refreshed my memory about this post by Eric Gur: http://forum.doom9.org/showthread.php?p=1551981#po...