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Old 11-08-2014, 05:19 PM   #1
Holering
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Registered: Feb 2010
Distribution: Slackware - Gentoo - Debian
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DAC quality on HDMI to VGA converters?


Anyone try something like this?:
http://www.ebay.com/itm/New-HDMI-In-...item2ed8ff2114

Interested in getting one but I'm not sure how the analog quality is. Is it transparent on most without lag?

I've been using an 8400GS (g98) vga card and the VGA quality seems transparent (can't notice difference between DVI and VGA). However, I also have a Rage 128 vga card and the quality on that seems inferior; high refresh rates and resolutions look somewhat softer. I have a mixture of VGA and digital equipment so I could use an external DAC.

Anyone try one of these and notice loss in quality? How do they compare to video cards with really good RAMDAC's?

Help would be appreciated!
 
Old 01-20-2015, 09:53 PM   #2
Holering
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Registered: Feb 2010
Distribution: Slackware - Gentoo - Debian
Posts: 197

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Decided with this one http://www.gumptrade.com/media/catal...nd_audio-1.jpg. The image quality seems pretty good! I can't notice a loss and I've used up to 1920x1440 on some monitors. But that's not saying much...

There's an obvious DDC-EDID issues or similar with this converter. If monitor is on before powering pc, I get no picture. I have to turn on monitor after arriving at boot prompt, or wait for a video mode switch further along. Not only that, when boot prompt does show it's stuck at 1024x768 with ugly bilinear scaling (720x400 scaled); it doesn't let monitor scale. These problems make it almost unusable. I can only use it in Windows since switching framebuffer terminal and Xserver realtime in Linux loses picture every time. I'm hoping daisy chaining a edid dummy plug to a hdmi y splitter cable can fix this.

Last edited by Holering; 01-20-2015 at 09:55 PM.
 
  


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