Forcing a Steam game to run at 75 Hz

Amanda S · 2014-05-12 08:26:45

Hello,

I'm trying to set EuroTruckSimulator 2 to run at 75 Hz, but it keeps opening at 60 Hz which makes my eyes hurt. I tried setting it's launch options (On it's Properties tab, on Steam) to "-refresh 75" with no results. Also, there's no good in-game change for refresh rates, only to 50 and 59 Hz. There's nothing related to it in the game's folders.

I couldn't find anything related to a specific app profile in regards to the nvidia control panel, only Global sets which don't work because the game will change the refresh rate to 60 anyway.

Any help is appreciated.

Last edited by Amanda S (2014-05-12 13:59:57)

kokoko3k · 2014-05-12 08:56:06

How about playing in a window on a 75Hz screen?
i think the problem is in the game code, and i've to add that sometimes even if the game opens on a 75hz display it will continue to update the frames at regular 60hz interval; making it not smooth; be aware of that.

Amanda S · 2014-05-12 13:58:01

That's a good temporary solution
Thanks.

Awebb · 2014-05-12 15:58:44

I'd set it to 50 and somehow force vsync.

ewaller · 2014-05-12 16:24:11

What technology display is this? Unless it is a CRT, it is a fool's errand. LCD's panels run at their native speed. If data arrive too fast, the controllers drop frames. If data arrive too slowly, they duplicate frames.

kokoko3k · 2014-05-13 10:32:23

ewaller, i've a tft display that can sync to 75hz too and it is smoother that way (doesn't drop nor duplicate frames either at 60 or 75 hz.)
There are also a lot of TVs that can sync to multiple frequencies (50hz pal, 24p,60hz and so on...)
What do you mean with "fool's errand"?

Last edited by kokoko3k (2014-05-13 10:33:28)

ewaller · 2014-05-13 15:38:21

kokoko3k wrote:

ewaller, i've a tft display that can sync to 75hz too and it is smoother that way (doesn't drop nor duplicate frames either at 60 or 75 hz.)
There are also a lot of TVs that can sync to multiple frequencies (50hz pal, 24p,60hz and so on...)
What do you mean with "fool's errand"?

I admit that it has been two years since I have designed anything that drives a LCD panel. Maybe in that time they have developed panels that can run at multiple rates. The last time I designed one, there was a front end that collected data at whatever rate it the video was encoded, a back end that fed data to the panel at the (one) rate it would accept the data, a a bunch of signal processing in between in which data were buffered, double buffered, filtered, interpolated, scaled, gamma corrected, and synchronized to the audio. Those panels used a active drive transistor to drive each subpixel and, at a given drive level, require a certain amount of time to charge or discharge a given cell. I suppose it might be possible modern panels use different drive levels to compensate for different dwell times. By I suspect there is something else going on that is not obvious.

The displays I designed could do PAL and SECAM (50Hz field rate, interlaced), NTSC (60 Hz Field Rate, interlaced), and VGA at (50, 60 and 75 Hz frame rated, progressive scan). The panel took the data at a 60 Hz frame rate, progressive. The really nice thing about LCD is that they don't flicker

A fools errand is an English colloquialism meaning a pointless task that cannot really be completed. Examples are a snipe hunt or a left handed smoke shifter

Amanda S · 2014-05-13 20:34:12

Awebb wrote:

I'd set it to 50 and somehow force vsync.

Tried. No results.

ewaller wrote:

What technology display is this? Unless it is a CRT, it is a fool's errand. LCD's panels run at their native speed. If data arrive too fast, the controllers drop frames. If data arrive too slowly, they duplicate frames.

Yes. It's a 17" Samsung CRT. Probably the best monitor I could find for gaming

In counter Strike I used to play at 640x480 @120Hz on the LCD monitors, when lan gaming was still a big thing around here. Now their 19" LCD monitors can't pass 60 Hz and it's terrible for Counter Strike. For other games it's more than fine. And now seems like I can't change this on Counter Strike for Linux, but on Windows I played with the game at 160 fps and the monitor refresh rate to 160 Hz, never been happier.

R00KIE · 2014-05-13 21:08:07

@ewaller
LCD monitors can sync at frequencies other than 60Hz and even advertise it, but like you say it doesn't mean there is any obvious advantage and the recommended sync frequency is most probably not the highest one. As an example here is what xrandr has to say about my Samsung 931BW (quite an old LCD):

   1440x900      59.89 +  74.98  
   1280x1024     75.02    60.02  
   1280x960      60.00  
   1152x864      75.00  
   1024x768      75.08    70.07    60.00  
   832x624       74.55  
   800x600       72.19    75.00    60.32    56.25  
   640x480       75.00    72.81    66.67    60.00  
   720x400       70.08

Then there is also the matter of the pixel response time, black to white or white to black response is fast but grey to grey can be a mess so even if the panel syncs at higher frequencies it doesn't mean the result with moving images is going to be pretty.

Arch Linux

#1 2014-05-12 08:26:45

Forcing a Steam game to run at 75 Hz

#2 2014-05-12 08:56:06

Re: Forcing a Steam game to run at 75 Hz

#3 2014-05-12 13:58:01

Re: Forcing a Steam game to run at 75 Hz

#4 2014-05-12 15:58:44

Re: Forcing a Steam game to run at 75 Hz

#5 2014-05-12 16:24:11

Re: Forcing a Steam game to run at 75 Hz

#6 2014-05-13 10:32:23

Re: Forcing a Steam game to run at 75 Hz

#7 2014-05-13 15:38:21

Re: Forcing a Steam game to run at 75 Hz

#8 2014-05-13 20:34:12

Re: Forcing a Steam game to run at 75 Hz

#9 2014-05-13 21:08:07

Re: Forcing a Steam game to run at 75 Hz

Board footer