Topic on Glossary talk:Graphics card
This page shows the changes between two versions of a post by Mirh in the topic "Cables, interfaces, and you" on Glossary talk:Graphics card.
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* Despite [[Wikipedia:VGA connector|DE-15]] being technically compatible with SCART, component, composite and whatnot, passive adapters (but even a lot of "normal" active ones, which are just meant to go from a modern digital connection to PC VGA) won't work with most older TVs due to just-too-different [[Wikipedia:Component video sync|video sync signals]], [https://old.reddit.com/r/crtgaming/wiki/connectors-and-interfaces#wiki_interfaces scan rate] or color space. | * Despite [[Wikipedia:VGA connector|DE-15]] being technically compatible with SCART, component, composite and whatnot, passive adapters (but even a lot of "normal" active ones, which are just meant to go from a modern digital connection to PC VGA) won't work with most older TVs due to just-too-different [[Wikipedia:Component video sync|video sync signals]], [https://old.reddit.com/r/crtgaming/wiki/connectors-and-interfaces#wiki_interfaces scan rate] or color space. | ||
:* RGB-to-CRT hacks, [https://emulation.gametechwiki.com/index.php/Display_FAQ custom cabling], having a [[Wikipedia:Multisync monitor|multisync magic box]] or an old [[Wikipedia:Video-in video-out|VIVO]] card are all possible alternatives (if not the ''only'' ones [https://www.youtube.com/watch?v=puu-iyTsZtg&t=69s available], for the highest end use cases) | :* RGB-to-CRT hacks, [https://emulation.gametechwiki.com/index.php/Display_FAQ custom cabling], having a [[Wikipedia:Multisync monitor|multisync magic box]] or an old [[Wikipedia:Video-in video-out|VIVO]] card are all possible alternatives (if not the ''only'' ones [https://www.youtube.com/watch?v=puu-iyTsZtg&t=69s available], for the highest end use cases) | ||
| − | * Not only may monitors support different "overt features" depending on the protocol | + | * Not only may monitors support different "overt features" depending on the protocol and version of the port they are currently hooked with, this factor can even [https://www.prad.de/testberichte/test-monitor-samsung-2494hm/7/ affect] [https://www.avsforum.com/threads/input-lag-wars-post-your-input-lag-results-of-your-lcd-display-here-for-reference.1131464/page-168#post-21438238 input lag] <small><small>(let alone the [https://www.rtings.com/tv/reviews/samsung/ks8000#test_14 absolute] [https://youtu.be/F9OvPfPd8s0?t=646 madness] that the TV world is)</small></small> |
* The final capabilities and bandwidth of a video connection is determined by the greatest common divisor between the GPU display engine block, the physical link encoder, cables (and/or possible adapters), and display-receiver: | * The final capabilities and bandwidth of a video connection is determined by the greatest common divisor between the GPU display engine block, the physical link encoder, cables (and/or possible adapters), and display-receiver: | ||
:*Data rate bounds are set by the RAMDAC frequency for VGA, while DVI and HDMI terms are set by the TMDS clock. These can often lead to lower supported resolutions than the official maximum of the protocols, especially on laptops (I have yet to hear about similar unexpected shortcomings in DP though) | :*Data rate bounds are set by the RAMDAC frequency for VGA, while DVI and HDMI terms are set by the TMDS clock. These can often lead to lower supported resolutions than the official maximum of the protocols, especially on laptops (I have yet to hear about similar unexpected shortcomings in DP though) | ||
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:* "Embedded" applications (i.e. about anywhere that isn't a desktop PC) have [https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1922754 less] stricter (and uniform) [https://linustechtips.com/topic/1306077-hdmi-21-on-3000-series-laptops/?do=findComment&comment=14485966 requirements] on the transmitter chip bridges <small>(this is most notable in the TV world with the most disparate subsets of HDMI 2.1 limitations)</small> | :* "Embedded" applications (i.e. about anywhere that isn't a desktop PC) have [https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1922754 less] stricter (and uniform) [https://linustechtips.com/topic/1306077-hdmi-21-on-3000-series-laptops/?do=findComment&comment=14485966 requirements] on the transmitter chip bridges <small>(this is most notable in the TV world with the most disparate subsets of HDMI 2.1 limitations)</small> | ||
:* Seriously, adapters are a [https://github.com/torvalds/linux/commit/6bffebc90c23e2341a1f8371e7b496ec94136e47 can] [https://www.phoronix.com/scan.php?page=news_item&px=mtq4mde of] [https://github.com/torvalds/linux/commit/fd952d436446cffdf97a61bf456a0987011e42e0 worms]. | :* Seriously, adapters are a [https://github.com/torvalds/linux/commit/6bffebc90c23e2341a1f8371e7b496ec94136e47 can] [https://www.phoronix.com/scan.php?page=news_item&px=mtq4mde of] [https://github.com/torvalds/linux/commit/fd952d436446cffdf97a61bf456a0987011e42e0 worms]. | ||
| − | :* Strictly speaking, cables [[Wikipedia:DisplayPort#Cables|don't]] [[Wikipedia:HDMI#Cables|have]] "versions" (well, except HDMI w/ ethernet which is separate by design I guess). You only have a minimum guaranteed bandwidth certification, which the actual cord could also easily exceed in practice. | + | :* Strictly speaking, cables [[Wikipedia:DisplayPort#Cables|don't]] [[Wikipedia:HDMI#Cables|have]] "versions" (well, except HDMI w/ ethernet which is separate by design I guess). You only have a minimum guaranteed bandwidth certification, which the actual cord [https://youtu.be/XFbJD6RE4EY?t=231 could] [https://www.youtube.com/watch?v=Vn2vdQZhs0w also] easily exceed in practice. |
:* Of course there are [https://www.hdblog.it/2015/01/24/HDMI-20-differenze-tra-full-e-draft/ all] [https://www.dell.com/support/kbdoc/en-is/000126493/setting-up-the-p2415q-p2715q-monitors-with-hdmi-2-0-that-support-4k-x-2k-60hz similar] [https://old.reddit.com/r/bravia/comments/jdejop/why_the_xh90_x900h_cant_do_4k120hz_in_dolby/ kinds] of problems on the screen's end too. | :* Of course there are [https://www.hdblog.it/2015/01/24/HDMI-20-differenze-tra-full-e-draft/ all] [https://www.dell.com/support/kbdoc/en-is/000126493/setting-up-the-p2415q-p2715q-monitors-with-hdmi-2-0-that-support-4k-x-2k-60hz similar] [https://old.reddit.com/r/bravia/comments/jdejop/why_the_xh90_x900h_cant_do_4k120hz_in_dolby/ kinds] of problems on the screen's end too. | ||
::* not last, since HDMI for some whimsical reason [https://www.avsforum.com/threads/2019-c9%E2%80%93e9-owners-thread-no-price-talk.3057634/page-432#post-58759564 cannot have] the YCbCr 4:2:2 bit depth measured (the thing actually always being [https://forum.kodi.tv/showthread.php?tid=332180&page=8#pid2760493 carried] on a fixed 12-bit signal<small>?</small>), some displays diagnostics menus can report "8 bit" as a placeholder value | ::* not last, since HDMI for some whimsical reason [https://www.avsforum.com/threads/2019-c9%E2%80%93e9-owners-thread-no-price-talk.3057634/page-432#post-58759564 cannot have] the YCbCr 4:2:2 bit depth measured (the thing actually always being [https://forum.kodi.tv/showthread.php?tid=332180&page=8#pid2760493 carried] on a fixed 12-bit signal<small>?</small>), some displays diagnostics menus can report "8 bit" as a placeholder value | ||