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Old 29 October 2019, 02:30   #1
rsn8887
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Lagless Beamrace Questions

I finally got myself a Freesync Monitor, and now I can play in 50 Hz with buttersmooth scrolling.

The lagless Vsync (Beamrace) mode also works and I cannot go back after trying it once.

I am getting the occasional audio glitch and/or video glitch.

I am wondering, what is the number next to beamless Vsync selection box for? What does it mean? It changes something.

EDIT: I noticed if I change that number from the default "4" to "1" then I have zero glitches, PERFECT lagless gameplay! I cannot believe it.

EDIT2: I am using a cheap ($89 at amazon.com) freesync monitor "LG 22MK430H-B 21.5-Inch Full HD Monitor with AMD FreeSync, Black" via HDMI and my old ASUS NVidia 9500 GT gfx card

Last edited by rsn8887; 29 October 2019 at 02:35.
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Old 29 October 2019, 04:09   #2
sonninnos
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They are slices. I use 10, and that equals 500 fps, which is low enough frametime delay versus GPU usage/heat for me.

Try forcing the program specific power management mode in the nvidia control panel to "prefer maximum performance" for more steady results with higher values. Or maybe that card just is not up for the task.
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Old 29 October 2019, 05:02   #3
Retro-Nerd
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Quote:
EDIT: I noticed if I change that number from the default "4" to "1" then I have zero glitches, PERFECT lagless gameplay! I cannot believe it

1 slice is far from perfect. If your PC/graphics card is performance-wise capable then 4 slices are already pretty good. The more the better.
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Old 01 November 2019, 16:51   #4
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Mmmh, I never tried beamrace modes... I use G-sync'ed WinUAE and find it butter smooth for 50Hz games. Would there be some improvements in using beamrace + real 50Hz screen (because I need this one for beamrace, right?), and only for lag input stuff or is also visibly smoother?
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Old 01 November 2019, 17:05   #5
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Yes, for input lag only. G-Sync/Freesync usually removes 17-20ms lag, compared to standard Vsync enabled. Beamracing can remove much more lag, depending on the slice settings. Given that normal PC emulation causes 3-4 frames (or even more) total lag (= 60-80ms) you can reach real hardware+CRT TV/monitor lag by using the Beamracing option. If your PC is fast enough. Your laptop hardware specs looks good enough for that.
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Old 01 November 2019, 17:14   #6
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Thanks for detailed explanation
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Old 14 November 2019, 22:02   #7
Toni Wilen
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As mentioned in beta thread, I added some tweaks to beamraced mode that improves stability greatly (at least here. most likely not all configs work identically as usual).

http://www.winuae.net/files/b/winuae.7z
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Old 21 November 2019, 07:40   #8
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I now switched to 2 slices, and I get less lag than any other emulator on my PC. Higher slices gives me some slowdown, but my computer is very old. Lagless beamrace makes WinUAE the only emulator that comes close or similar in performance to Mister FPGA with vsync_adjust = 2 setting in Mister.ini in terms of input lag.

Amazing!

Just to repeat: Once you have experienced this reduced lag, there's no going back. Playing fast games like Turrican without lagless beamrace feels like moving through sluggish molasses to me now.
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