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+--- Thread: Constant FPS drops with modern Radeon graphic cards FIX (/thread-7478.html)
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Constant FPS drops with modern Radeon graphic cards FIX - kamikadze_pl - 12-05-2017
Hi,
This is my first post here. I came here to share with you how to fix irritating fps problem if you use newer AMD Radeon GPU. I had massive problems with unstable fps while playing ET on my laptop. FPS were changing all the time from about 50 to 125fps. Game was lagging and /r_primitives 2 command did not help. I was trying to fix the fps problem by installing older graphics drivers, did not help
Yesterday I accidentally found a solution http://www.crossfire.nu/tutorials/221/how-to-play-et-in-2015 in the comment section on the bottom of the page, Chriswww wrote: Quote:On newer AMD gpu and drivers lots of fps lags due to the known problem of ET not allocating enough space where it puts a list of all the opengl extensions the driver is capable of. IET does this so it knowns which opengl extensions it can potentialy enable. Most gpu drivers nowadays have such a long list of supported opengl extensions that most of this list is cut off. Many moons ago the official drivers had a workaround, then later drivers didnt expose this setting but it was still internally available. So third party utilities let you turn this fix on. Now the utilities are all old and dont work with newer cards. The windows drivers will automatically apply this compatibility fix when you rename et.exe to quake3.exe. You'll see that you dont get the warning about extension string too long in startup messages in console. Most importantly, gfxinfo will now show that compiled vertex arrays (extension) enabled, without which you get the fps drops. On Linux/Mac, there's an environment variable you set before starting ET, which activates a corresponding fix. It's something like MESA_MAX_EXTENSION_YEAR or similar, and should be set to 2007 or before. Google for mesa opengl environment variable page, which documents them. On Nvidia, use third party Nvidia Inspector program to either set up ET profile or global profile setting extension_string_version to 4844 (hex value)YES, all I had to do was to change ET.exe name to quake3.exe
Now 125 fps is almost rock solid, it drops to ~100 only in a few places 
I hope this thread will help someone.
Thanks for reading
Robert
RE: Constant FPS drops with modern Radeon graphic cards FIX - Snowman - 12-05-2017
Thank you for sharing the information, have a nice weekend!
RE: Constant FPS drops with modern Radeon graphic cards FIX - SOMEBODYONCETOLDME - 12-05-2017
The way i fixed this back in the day with a new AMD gpu was by simply underclocking the card. However Do note that is dangerous and not recommended!
RE: Constant FPS drops with modern Radeon graphic cards FIX - EviLex - 12-05-2017
(12-05-2017, 03:09 PM)SOMEBODYONCETOLDME Wrote: The way i fixed this back in the day with a new AMD gpu was by simply underclocking the card. However Do note that is dangerous and not recommended!
Wow, first time hearing of UCing a GPU just to play a game, well done.
RE: Constant FPS drops with modern Radeon graphic cards FIX - Ludi - 12-05-2017
Thank you for providing us this information, it might help someone!
Cya in game
RE: Constant FPS drops with modern Radeon graphic cards FIX - drag - 12-05-2017
thanks for the info
RE: Constant FPS drops with modern Radeon graphic cards FIX - SOMEBODYONCETOLDME - 12-05-2017
(12-05-2017, 03:47 PM)EviLex Wrote:First time? I hear fixes for games being UCed everywhere 0.o(12-05-2017, 03:09 PM)SOMEBODYONCETOLDME Wrote: The way i fixed this back in the day with a new AMD gpu was by simply underclocking the card. However Do note that is dangerous and not recommended!
Wow, first time hearing of UCing a GPU just to play a game, well done.
RE: Constant FPS drops with modern Radeon graphic cards FIX - Kenny - 12-05-2017
Your name is Robert too? so many of us xDD but that actually helped me out so thanks!!
RE: Constant FPS drops with modern Radeon graphic cards FIX - Valk - 12-05-2017
Will use when I have my PC, so thank you.
Robert is a overrated name xD
RE: Constant FPS drops with modern Radeon graphic cards FIX - Mystik - 12-05-2017
Interesting, thanks for the info