Official Sandy Bridge / LGA1155 for HTPCs Thread - Page 12

Download it from here (INTEL1.pdf, 43 pages) if you are interested in Intel CPU/chipset/motherboard roadmap.

AMD Bulldozer Benchmark if you are interested in SNB vs Bulldozer.

PassMark - CPU Mark

- Bulldozer: 17000
- Core i7-2600K: 9300

Bulldozer is too good to be true. I don't know if it's a fake or not.

I red the whole thread, but one thing is not clear to me.

The SB (HD3000) cannot output a frequency of 23.976.
When a movie is 23.976 the chip outputs 24 Hz (UAC on). So the display also sets the frequency on 24 (multiply; 72 Hz).

But software can speed up the frequency from 23.976 Hz to 24 Hz?

Then there will not be any judder (stuttering).

As I'm going to hold off until the fixed Sandy Bridge mother boards are available before building my HTPC, I think that waiting another month or so for the Core i3-2105 to be released looks like a sensible option.

James

When playing back 23.976 fps @ 24 Hz, an extra frame is periodically required to compensate for the rate mismatch. This can cause a slight judder to be seen depending on content.

+1

If you are saying that playing back 23.976 fps @ 24 Hz then the movie is 24 fps, but I think that the hardware cannot output 23.976, but only 24 Hz. So the movie on your PC is actually running @ 23.976 fps, the Sandy Bridge hardware is 'communicating' with the display device that it's playing content @ 24 fps, so that your display device is refreshing @ 24 fps (multiply - 48 or 72 for instance) and the movie is out of sync.

Yes, it can, and this had been a normal way to play back video at around 24Hz (depending on the graphics card) without stuttering. But the the sound playback speed has be adjusted to stay in sync with video and this is done the best only when the audio is decoded to LPCM, that many people don't like (i.e. prefer bitstreaming).

So if the SB can output 23.976 and the movie = 23.976 then the display (for example my Pioneer Kuro KRP-500) = refreshing @ 23.976 (multiply).

I don't see the problem Movie and audio are perfect in sync, because the audio 'belongs' to the original 23.976 speed.

Most BD movies are also recorded @ 23.976 and BD players are perfectly playing the movie with the audio in sync. What'sthe difference between a BD-player and the Sandy Bridge HD3000.

The problem is that the SNB can't output 23.976.

OK, I misunderstood your sentence "software can speed up the frequency from 23.976 Hz to 24 Hz". I thought you were talking about changing video playback rate from 23.976Hz to 24Hz by ReClock. ReClock readme is a good reading on this matter.

Haha, OK!

So if you have the proper playing software (pitching from 23.976 to 24) then there's no problem (bitstream) with the Sandy Bridge?

Basically right now there's only one tool you can use to do that, and that's ReClock. It works with most DirectShow players, such as MPC-HC. The "problem" is that you cannot bitstream if you want it to adjust playback to 24.000 fps. The audio needs to be resampled, so you need to decode it to LPCM first on the player, and then ReClock (which is an audio renderer) will resample it to match the video playback speed.

The main problem with using this though, is that right now there's no easy (or free) way to decode DTS-HD or Dolby Digital Plus 7.1 (never seen this one used on any blu-ray besides the Dolby demo though).

Ok!

Most PAL systems speed up a DVD bij 4% to go from 24 to 25 fps (on a 50Hz /100Hz television). Does the DVD player do this at realtime (reclock video and audio) or is the DVD-movie already reclocked on the DVD?

So if you have a bluray player and watch a BD (with DTS-MA), than it outputs 23.976 and the display device also refresh at 23.976 (multiply by 3 on my Pioneer Kuro KRP-500 @ 71,928 Hz).

I am thinking for media extender Intel i3-2100t 35 watt CPU, fanless cpu cooler, DH67CF system board, 256GB SSD, 120 watt fanless power supply in a 1UP 8 inch deep rackmount case with the rackmount tabs removed and some little rubber feet added. No moving parts.

I saw that and chose to ignore it. I am intrigued but I doubt that anything named bulldozer will be a gentle giant. Should consume 125 W as a minimum?

The PAL DVDs generally speed up to 25p. ReClock can bring them back to 24p, including the pitch change that happens when they speed it up.

If you have a blu-ray player, it most probably will output 23.976 or 24 depending on the content, just like the ATI cards do.

CPU World reported some details on the February 20 release of SNB CPUs. This early launch matters only to OEMs (who decide to sell SNB PCs with defective chipsets), though.

It looks like Pentium G620T 2.2GHz 35W (a good choice for a media storage server) was postponed until Q2 2011 (the delay is not important for DIY people, of course).

Intel's Sandy Bridge E-Series in Q4 2011?

"A recent report indicates that Intel's upcoming enthusiast-class Sandy Bridge E-Series processors have been delayed by at least a whole quarter, now slated for a Q4 2011 release.

However now there's indication that Intel plans to increase the speed of the current Sandy Bridge platform with faster chips first over the summer before rolling out the elite version for performance machines in the Fall/Winter window.

...the processors will use the LGA2011 socket and offer "extra large cache" to maximize the overall speed of single-threaded and dual-threaded applications, the quad-channel memory controller, and "a number of other enhancements."

The documents also reveals that E-Series processors bearing four or six cores will be paired with the Intel X68 "Patsburg" core-logic set."

http://www.tomshardware.com/news/San...ies,12179.html

"Built on recently launched Sandy Bridge microarchitecture, Intel Core i3-2105 and Core i5-2405S microprocessors will pack two or four CPU cores, shared L3 cache, DDR3 memory controller and HD 3000 graphics controller on a single die. Both processors will support SIMD instructions up to SSE4 and Advanced Vector Extensions. Core i5-2405S will have 4 CPU cores and 6 MB L3 cache. The processor's base clock frequency will be 2.5 GHz, which can be boosted to 3.3 GHz under certain conditions. The CPU will feature AES instructions, VT-d virtualization and Trusted Execution technology, but won't support HyperThreading. Core i3-2105, on the other hand, will come with two cores, 3 MB L3 cache, and HyperThreading technology, but will be lacking Turbo Boost and advanced AES and vPro features. Intel i3-2105 and i5-2405S models will fit 65 Watt thermal envelope, and, like other Sandy Bridge processors, will use socket 1155."

http://www.cpu-world.com/news_2011/2...d_Q2_2011.html

The DH67CF relies on an active CPU HSF to cool the PCH and voltage regulators.

FWIW, I just did some testing with AMD, NVIDIA and SNB - none of them output 23.976.

Interesting. What GPU did you use for each?

What numbers do you get? With my 5770, I get 23.976 as measured with ReClock, and with MPC-HC I didn't get a repeated/dropped frame for more than 40 min. With the GTX 460, I got 23.973 by default, but with custom res I could get it within 0.001 (don't remember if it was + or -). Could depend on the display too.

AMD 5550, NVIDIA GT430 and Intel HD 2000


I used MPC-HC with the OOTB 23Hz setting and got 23.978, 23.972 and 23.973 (UAC disabled)/24.001(UAC enabled) from the respective GPU.

I also get 23.973 on my 460 with the default mode. Some tweaking got it a bit closer, its not a 100% perfect match, but still very close. I use reclock anyway and don't bitstream, so i could go with 24.000 for all i care.

Until you run into a DTS-HD 7.1 stream...

What display do you have? Have you tried an ATI card? I've read from other sources that ATI cards also give them 23.976. I'm thinking it's either the display, or the way it's being measured. (James swears by the accuracy of ReClock's "counting".)

BTW decoding DTS-HD bit-perfect in PC is now pretty easy because of Nevcairiel's splitter (LAV Filter). My own tutorial 1 and 2.

haha damn why wasn't I aware of that? Thanks. I have been bitstreaming without trouble though, I think it gives less issues than using WASAPI exclusive mode with ReClock.

What is your experience with ATI cards? Do you get 23.976?

Speaking of, do you know if this works with TMT5 as well?

I tested the initial build of TMT5. No, the audio decoder downsamples HD audio to 48/16. AFAIK TMT3 185 (and TMT2) is the only build that works perfectly.