After updating codec, I can play the 4K video without DXVA & without BSOD. However, after enabling DXVA, when playing no video but only sound. I think I'm missing codec(s) or filter(s).

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Added on August 24, 2011, 2:20 amOK. Now getting worse. After updating codec, video will run in ssslllloooowwww mmmoooottttiiiioooooonnnn when subtitle loaded.

This post has been edited by kizwan: Aug 24 2011, 02:20 AM

Please ignore the ssslllloooowwww mmmoooottttiiiioooooonnnn video. I just reset the codecs settings & everything is back to normal for non-4K video.

These are 4K video playback result
With i5-450M + GT335M + without DXVA:-
CPU: 42% - 51%
GPU: 26% - 28%
Result: Smooth playback.

With i7-720QM + HD5870 + without DXVA:-
CPU: 35% - 44%
GPU: 91% (due to HD5870 working at x1 link only)
Result: Micro-lag playback.

With i7-720QM + HD4570 + without DXVA:-
CPU: 40% - 57%
GPU: 44%
Result: Smooth playback.

This post has been edited by kizwan: Aug 24 2011, 03:52 AM

Same here. Fortunately, I don't have to go office at 8 a.m. But I still need to wake up early. Sometime, Saturday & Sunday also working. Go there & there. Sometime go home at 2 a.m. - 3 a.m. or the next morning. Guess what is my job?

This post has been edited by kizwan: Aug 26 2011, 10:27 AM

No la. I'm System Integrator, System Engineer, IT Consultant. Working with private company, so can use any name. I deal server, system stuff. "Go there & there" - means visiting sites. I don't need to go to office frequently. My home also my office.

I fed up already with 4K+DXVA. Anyway, you don't actually need to use DXVA to play 4K video. If you got strong processor, you can watch 4K video smoothly. On my notebooks, without DXVA, it play smoothly. Only sometime micro-lag a bit. But after I re-installed codec, it lag a bit more but still a bit smooth.

BTW, after countless reinstalling codecs, I'm still unable to play 4K video with DXVA on both of my notebooks.

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Added on August 26, 2011, 10:52 amI still bring my Dell. A42Jv left at home.

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Added on August 26, 2011, 10:53 amNo. BIOS mod is just my hobby.

It depend whether it clear CMOS or not. On my old Acer notebook, everything reset.

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Added on August 26, 2011, 10:55 amYou can use "4K Downloader" to download 4K video from Youtube.

This post has been edited by kizwan: Aug 26 2011, 10:55 AM

What Dell do you have?

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Added on August 26, 2011, 11:04 amThere is another way. You can find "clear password" video on youtube.

This post has been edited by kizwan: Aug 26 2011, 11:04 AM

This notebook have UEFI. Not my expertise. If you want to experiment, I can provide a test BIOS for you.

Last time I checked, I didn't find anything worthwhile to unlocked (performance related). The only performance related is dual-IDA. Dell BIOS did not locked EIST. So, you can use ThrottleStop to activate dual-IDA.

That not use DXVA. Latest MPC-HC can use DXVA automatically when the video file required it (e.g. anime) but with 4K video you need to force it. You can follow this website:-
http://imouto.my/watching-h264-videos-using-dxva/
Ignore the unimportant procedure. The only one important is blocking the "ffdshow Video Decoder".

Are you sure? This is experimental only. It might bricked your notebook - a.k.a. become expensive paperweight.

For watching anime or any other video, no need to follow the website. MPC-HC can auto-use DXVA when the video need it.

lee_what can use dual-IDA because it have Core 2 Duo. Your notebook processor does not support dual-IDA.

I can try to unlocked hidden menu in UEFI but it is experimental.
I use K-Lite Codec Pack 7.60 Mega version. On my notebooks can play 4K video smoothly with sometime micro-lag without DXVA. When I forced DXVA, I only got no video, only sound. Sound is smooth though. For anime, I can play 720p to 1080p anime/video without any problem using DXVA (automatic).

This post has been edited by kizwan: Aug 26 2011, 11:57 AM

No, I didn't try beta.

If I play 4K video with DXVA with freshly installed codec, I also got BSOD. After reset codec to recommended settings, I got no video, only sound.

I tried on my A42JV also no display, only sound when using DXVA. Did I do something wrong?

I think because Optimus but don't know for sure since with both Dell & Asus I got the same result; no video, only sound.

This post has been edited by kizwan: Aug 26 2011, 01:34 PM

I did but didn't check discharge rate with previous driver to compare. Now discharge rate without doing heavy work is -24024mW or -24W. Is this figure OK?

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Added on August 26, 2011, 2:19 pmWait a sec. It fluctuate from -14W to -24W. Look like background service(s) use power a bit.

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Added on August 26, 2011, 2:21 pmLowest is -11.946W.

This post has been edited by kizwan: Aug 26 2011, 02:21 PM

Mine while browsing -21W (firefox).

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Added on August 26, 2011, 2:44 pmWait a sec. I'm running virus scan. That's why so high.

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Added on August 26, 2011, 2:46 pmNvidia icon is grey color.

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Added on August 26, 2011, 2:46 pmVirus scan finished. Now average -13W while browsing.

This post has been edited by kizwan: Aug 26 2011, 02:47 PM

I only tested with two 4K video. Both got same result.

What happen to your keyboard? Try press the "A" button back to it place? Stick it back.

It won't feel the same anymore whether you put double tape or glue. Buy replacement from ebay if warranty already expired.

If that is the case, buy new one. On ebay got cheaper I think.