ASRock CoreHT 252B Review
by Ganesh T S on September 2, 2011 3:45 AM EST- Posted in
- HTPC
- Intel
- ASRock
- Media Streamer
One of the main issues with Intel's integrated GPU solutions for HTPC users was the absence of 23.976 Hz refresh rate support. When Sandy Bridge was launched, it was discovered that the 23 Hz setting could be activated and made to function as intended if UAC was disabled. With v2372 drivers, the disabling of UAC became unnecessary.
While we don't get perfect 23.976 Hz yet, it is definitely much better than the earlier scenario. Though there are user reports of lip sync still being an issue (particularly when used with a projector), we were unable to corroborate this finding. Personally, I managed to watch two complete movies at their native refresh rate without losing lip sync in our test setup.
23.976 fps Video Playback (MPC-HC/EVR-CP) with 23Hz Refresh Rate Setting
24 fps Video Playback (MPC-HC/EVR-CP) with 24Hz Refresh Rate Setting
The 24 Hz refresh rate feature works as before. Unfortunately, the drifting in the refresh rates doesn't seem to average to 23.976 Hz in the first case. The player locks to 23.972 fps, which implies a skipped frame every 250s (~4 minutes). The scenario seems similar for other refresh rates.
Another aspect we found irritating with Intel's GPU control panel is the custom resolution section. Intel seems very reliant on EDID and doesn't allow the user to input any frequency not supported by the display. I recently got hold of a display (Sony KDL46EX720) to help test 3D as well as multiple refresh rates. Since the unit was sold in the US, it doesn't indicate PAL compatibility in its EDID information. I was able to play back PAL videos with matched refresh rates using the Vision 3D (NVIDIA GT 425M), but Intel's control panel wouldn't allow me to set up 50 Hz as the display refresh rate. It is possible that an EDID override might help, but we can't help complaining about Intel's control panel not being as user friendly as NVIDIA's.
In the next section, we will look at how the integrated GPU in the ASRock CoreHT 252B handles cadence detection and deinterlacing.
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Death666Angel - Friday, September 2, 2011 - link
<<Well, the reviewer only used Windows, hence assuming that one pays for it.>>That would be true, except for the part where in the table on the first page, he writes:
"Operating System Windows 7 Home Premium 64-bit (Retail unit is barebones)"
I agree, however, that he could have stated it clearer in the text when he mentioned the software being shipped with the system ("Our review unit shipped with Windows 7 x64 Ultimate and a OEM version of Cyberlink PowerDVD for Blu-Ray playback.").
ganeshts - Friday, September 2, 2011 - link
Guys, I am keeping track of the developments in the Linux HTPC space.As soon as we can get to a point where it is possible to play Blu-rays with menus (we can already playback encrypted Blu-rays with MakeMKV installed, just not with menus -- this was the state when I last looked at it), we will carry out a detailed Linux HTPC article.
Rick83 - Friday, September 2, 2011 - link
Thanks, looking forward to that!bobbozzo - Friday, September 2, 2011 - link
Hi Ganesh,I don't care about BD so I'd like to see a review even if BD menus don't work.
Thanks for all the HTPC articles!
Miles Prower - Saturday, September 3, 2011 - link
I'm considering buying this machine too, as both a lightweight desktop PC (hey, why not) and a HTPC. Both solutions running Linux.I'd llove to see a review considering XBMC performance and hardware support!
cjs150 - Friday, September 2, 2011 - link
"The unit has a noise level of less than 36 dB at full load "Not good enough. The system needs to be much better 30dB or less. Then there is the issue of how noisy is the Blu-ray drive. In my AV rack the one aspect which really annoys me is the Sony Blu ray player which is clearly audible at quiet points in movies. So would really like to know how loud the optical drive is (why do case manufacturers no include some dampening?)
Having said that it is clearly a very good system . Problem is that Zotac have just announced their AD10 nano system. Whilst it is over priced and lacks an optical drive (not a problem for me as store movies to NAS), in a main room it just looks a far better piece of kit, and a lot smaller (and allegedly quieter)
pvdw - Friday, September 2, 2011 - link
"27 dB during Disc Playback"cjs150 - Friday, September 2, 2011 - link
Oops missed that in the charts.Much better, but I do wonder how much of that noise is due to the Blu ray drive - 22.4 dB on idle and 27 dB on Blu ray playback does not really help me - was this playback from HD or from the optical drive. I can believe the number if from HD, I do not believe the number if from optical drive, but if it is correct then I am impressed. Maybe it is just me, but case manufacturers have spent some time putting vibration dampening grommets for hard disks but never for the optical drives - why? A bit of care might reduce the noise considerably.
The problem is that we keep getting quoted dB and how something is so quiet it is effectively silent when clearly it is not. The standard I work to is very simple. If I can hear a computer during a quiet section of a movie or a song, than it is too loud.
ganeshts - Friday, September 2, 2011 - link
Disc = optical drive. The extra noise is due to the operation of the ODD. Yes, I agree with your metric that if people hear it, it is noisy. However, different people have different tolerance / hearing levels. So, you do need to have some sort of base metric to compare against. For example, at 2 ft, I find 36 dB quite audible. But, only during quiet scenes in the video.Rick83 - Friday, September 2, 2011 - link
note that the measurements were done at 2 feet and not the more or less standardized meter. I'm not going to make the transformation now, as I'm not to keen to get into exponential scaling at this time of day, but it's always important to keep the context of db(A) measures in mind when comparing values.