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Input lag VS...

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Elaphe666:
I'm currently using a gaming LCD monitor (165 hz with freesync), with MAME, no vsync, no syncrefresh, with low latency on and I'm very happy with the input lag (not noticing any actually). I was considering using another computer with a CRT TV, running Windows 10 with an ATI card plus a VGA-SCART cable, and CRTemudriver with Groovy MAME. My concern is: will I get worse, the same or better input lag than using my freesync monitor? I mean using GroovyMAME without frame delay, since I've heard that feature is problematic and has to be configured game by game (I have no time and will for that). I also know it demands a very powerful computer and I only have a i5 10400 and don't want to be again worried about frame loss in demanding games such as CAVE shoot'em ups or STV games. Thank you.

Calamity:

--- Quote from: Elaphe666 on December 11, 2024, 03:28:11 am ---My concern is: will I get worse, the same or better input lag than using my freesync monitor? I mean using GroovyMAME without frame delay

--- End quote ---

Roughly:

MAME + lowlatency + no vsync + freesync -> sub-frame latency
GroovyMAME + lowlatency + vsync + frame delay -> sub-frame latency
GroovyMAME + lowlatency + vsync + no frame delay -> a bit over 1 frame latency


--- Quote from: Elaphe666 on December 11, 2024, 03:28:11 am ---since I've heard that feature is problematic and has to be configured game by game
--- End quote ---

Where did you hear that exactly? There's so much hate in the world.

Well, yes, it has to be configured per-game, it can be done in seconds through the ui, and the value is saved and remembered automatically.


--- Quote ---(I have no time and will for that)
--- End quote ---

Fair enough. GroovyMAME intends to offer a solution even if that requires some involvement from the user's part.

If you have no time but have some cash, GroovyMiSTer is the solution that beats everything else today.

Elaphe666:
I've heard that high values of frame delay can make some games skip animations with very bad results. Another problem is having to check the performance for every game in my collection in order to see if framesync demands more power than my CPU can provide. That idea is a no-go for me.

After reading your comments in a Youtube video I've learnt that frame delay is intented to cure the lag added by vsync, which has to be set to on with GroovyMAME and that MAME + lowlatency + no vsync + freesync grants a value of input lag as low as GroovyMAME with frame delay set to the maximum.

So, considering the above I've decided to abandon my proyect of using GroovyMAME with my CRT TV and buy a big modern TV set with freesync. I'm very happy with the looks of MAME on a TFT screen specially now with BGFX and shaders such as CRT_geom_deluxe, and I yet have to try some shaders converted from Retroarch, which look amazing (although I think they are for 4K only).

I will not dump my CRT TV yet, as I will focus on the FPGAs. It's a shame the lack of supported games, but that may change a lot in the future. What is GroovyMister? A MAME core for Mister? Any advantages over the MAME core. I thought the MAME core using a FPGA was already the perfect solution for a CRT and no lag at all.

donluca:
Always remember that CRTs add virtually 0 lag.

With a LCD you might have sub-frame input lag on the machine side, but 25638798209852 minutes of lag because of the panel.

Elaphe666:

--- Quote from: donluca on December 11, 2024, 02:56:31 pm ---Always remember that CRTs add virtually 0 lag.

With a LCD you might have sub-frame input lag on the machine side, but 25638798209852 minutes of lag because of the panel.

--- End quote ---

Correct me if I am wrong, but aren't modern monitors and TVs achieving response times of around 1 ms? I don't think that is even noticeable.

Also, when Calamity said "sub-frame latency", how many milliseconds are we talking about?

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