this post was submitted on 23 Jul 2024
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218
Ancient CRT monitor hits astonishing 700Hz — resolution reduced to just 120p to reach extraordinary refresh rate (www.tomshardware.com)
submitted 4 months ago by schizoidman@lemmy.ml to c/technology@lemmy.world
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cross-posted from: https://lemmy.ml/post/18305395

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[–] bionicjoey@lemmy.ca 3 points 4 months ago (1 children)

Yeah I didn't think it would make the "pixels" smaller, but the beam would need to pulse less often and therefore could travel more. Maybe I'm misunderstanding what they did.

[–] deranger@sh.itjust.works 11 points 4 months ago (1 children)

Electron beams scan insanely fast, that isn’t the limiting factor. Getting that much bandwidth across a VGA cable is tough. If you wanted super high refresh rates on old CRTs you’d have to drop the resolution. Same concept.

[–] bionicjoey@lemmy.ca 8 points 4 months ago (1 children)

Ah. I see, so reducing the resolution was more about sending frames to the monitor faster, not about optimizing the tube hardware's behaviour

[–] dgriffith@aussie.zone 3 points 4 months ago* (last edited 4 months ago)

Yeah basically you can only signal "on-off" so many times a second in a vga cable before the ons and offs get blurry and unusable. So you can trade lower resolution for a higher frame rate as long as you keep the total number of on-offs below the limits.