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UHD system questions

 
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Leo S



登録日: 2012.10.13
記事: 10

記事日時: Thu Nov 30, 2017 2:22 am    記事の件名: UHD system questions 引用付きで返信

I guess there may be problems getting this to work properly, but I'm thinking of using this card with A7SII:

https://www.blackmagicdesign.com/uk/products/intensitypro4k/techspecs

Will SSD on SATA3 be suitable for storage/writing if using lossless codec? What bandwidth would I need for this?

Even if it's not possible to use 2160p30, does this card look suitable for 1080p30 at least?

If the BMD card is not suitable, then I may get this card instead:

https://www.novatech.co.uk/products/startech-com-high-definition-pcie-capture-card-hdmi-vga-dvi-and-component-1080p-at-60-fps/pexhdcap60l.html?gclid=EAIaIQobChMI1p7iqKTk1wIVCL7tCh3Omw6KEAkYCCABEgJmoPD_BwE#utm_source=google&utm_medium=base&utm_campaign=products

I'm also looking at one of these to extend the range of the HDMI cable:
https://www.startech.com/uk/AV/Extenders/HDMI/HDMI-signal-booster-extender~HDBOOST4K

Is this ok to use?

Thanks for any help!
Leo
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登録日: 2004.08.07
記事: 9024
所在地: 139.66E 35.65N

記事日時: Thu Nov 30, 2017 6:48 am    記事の件名: Re: UHD system questions 引用付きで返信

Hi

A7S with BMD is working well at 3840x2160/29.97p on my PC below. It has been working for more than two years.
It requires over 800MB/sec Raid0 SSD strage and 4.0GHz CPU.

I do NOT recommend to use lossless codecs, they will cause frames drops even using 4.0GHz CPU.

HDMI repeater or splitter for 4K30p works well on my station. They are very combenient.

And, more.... here is a report for 4K60p
http://sonotaco.jp/forum/viewtopic.php?t=3985



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3840x2160 peakhold by A7S

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Leo S



登録日: 2012.10.13
記事: 10

記事日時: Thu Nov 30, 2017 1:36 pm    記事の件名: 引用付きで返信

Thank you. That is very helpful. Unfortunately the PC that I had in mind for this project is only capable of 3.0 Ghz, so I will have to consider new components. The report you posted, and the details of your own system are just what I needed.

Can I also please ask, what is your OS drive, and are you using M.2 SSDs at all?

It seems M.2 ports would be quite useful for writing data to (see quote below), but if 2x SSD with Raid0 using SATA3 will work, then best use of M.2 would be for the OS drive I guess?

From Wikipedia:
Quote:
The M.2 specification provides up to four PCI Express lanes and one logical SATA 3.0 (6 Gbit/s) port, and exposes them through the same connector so both PCI Express and SATA storage devices may exist in the form of M.2 modules. Exposed PCI Express lanes provide a pure PCI Express connection between the host and storage device, with no additional layers of bus abstraction.


I will have to get up to speed on current motherboards (again). I guess looking for SATA 3.X and Tunderbolt ports will be good, but can you share any other tips when looking for a motherboard?

Best regards,
Leo

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登録日: 2004.08.07
記事: 9024
所在地: 139.66E 35.65N

記事日時: Thu Nov 30, 2017 5:47 pm    記事の件名: 引用付きで返信

Leo S wrote:
what is your OS drive, and are you using M.2 SSDs at all?

It seems M.2 ports would be quite useful for writing data to (see quote below), but if 2x SSD with Raid0 using SATA3 will work, then best use of M.2 would be for the OS drive I guess?


My OS drive C: is HDD.
The capture target drive such as Raid0 SSD must be dedicate drive for capturing (means, must not be OS drive).
It needs over 800MB/sec = 6.4Gbps bandwidth. single SATA3.0 channel may not be enough.
The speed of OS drive is not the problem.
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Leo S



登録日: 2012.10.13
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記事日時: Fri Dec 01, 2017 12:42 am    記事の件名: 引用付きで返信

Thank you for the clarification.

Best regards,
Leo
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