Have you tried running Doom 3 over some of the source ports people have made with the GPL released source code? I don't think there are anything for Quake 4, but there's several for Doom 3 including ones specifically targeting the BFG Edition release. (Which has incompatible base files with the original Doom 3 and mods)

I forgot to mention that the source ports do not solve this issue.

Atleast not one of the ports.

Quite Strange.

Still Im really only intrested in playing them in their original state.

You've provided no information on when this slowdown is supposed to be happening.

Also if you think it's driver related, just start testing different driver versions?

ZellSF wrote on 2020-04-04, 01:02:

You've provided no information on when this slowdown is supposed to be happening.

Also if you think it's driver related, just start testing different driver versions?

Oh Ofcourse.. Sorry!

It occurs when there are more than two enemies on screen at once.
Sometimes it happen with only two.

Aslong as the ingame AA is cranked up it Will happen all the time when the action starts.
It can also happen in some rooms aswell with more complex geometry.

It is present almost all the time throughout the game.
It is impossible to not notice this when it occurs... All you gotta do is to start the game and play for a few minutes to know if your gpu has this issue.

When it comes to drivers for the gtx960 i have tried all versions from nvidia and an even earlier modded version aswell.

The gtx960 is clearly to modern and the drivers too.

I know i Will need something earlier.

Would be Nice to not have to buy every high end gpu from 480to to 780ti to find out wich one works.

I don't have a high-end card, just a GTX 750 Ti, currently using driver version 430.86 on Windows 10. Only FPS takes a hit at 16x AA, nothing goes out of sync.

I personally don't see the reason to use AA in this game as I find it looks pretty sharp without it. For certain other games, when it comes to old school MSAA, if I use it, I set it at 4x max, anything higher is an overkill IMHO.

OK, did some basic testing and there's no issue with newer Nvidia cards (I have a GTX 1070) or drivers (I have the latest driver).

What I suspect is happening however, is that you've enabled fixedTic and you're running too high graphic settings (not reaching 60 FPS, or the FPS limit you set). That will lead to slowdown. Disable fixedTic or lower your graphic settings.

Your GPU is clearly not adequate to run Quake 4 at 1080p with 16x MSAA. MSAA is really resource intensive. My 1070 sometimes drop below 60 FPS with those settings. Personally I just use FXAA (since I run 2160p@120hz), but for a 1080p monitor I would stick with UCyborg's recommendation: for the purposes of eliminating jaggies at least, MSAA levels over 4X aren't worth it.

Thanks for testning 😀

I had DooM 3 running on a gtx280 with 4x i game msaa with none of the slowmotion slowdown.

However doing the same on the 960 i get slowdown but as I stated before it is not your normal framerate slowdown as it just makes the game run in a Strange slowmotion speed wich seems to be tied to the games logic.

I capped the game at 60 and used the fixedtic 1 command to get rid of the awful stutter the game is has due to the strange 63hz the game normalt runs at.

Unrealdevon wrote on 2020-04-09, 10:50:

Thanks for testning 😀

I had DooM 3 running on a gtx280 with 4x i game msaa with none of the slowmotion slowdown.

There's a massive difference between 4X and 16X even if you were running the same resolution, and considering the GTX 280 was a 2008 card I suspect that might not have been the case.

At any rate, driver performance might have got worse over time, but 16X MSAA is still unnecessary and it's unlikely anyone's going to waste time figuring out why it's giving you performance problems.

Unrealdevon wrote on 2020-04-09, 10:50:

However doing the same on the 960 i get slowdown but as I stated before it is not your normal framerate slowdown as it just makes the game run in a Strange slowmotion speed wich seems to be tied to the games logic.

I capped the game at 60 and used the fixedtic 1 command to get rid of the awful stutter the game is has due to the strange 63hz the game normalt runs at.

The slowdown is because you're using fixedtic. You probably weren't when you had a GTX 280.

Ok

Is there any way to get rid of the frameskip/stutter, what ever it is without using fixedtic 1?

Unrealdevon wrote on 2020-04-09, 18:33:

Ok

Is there any way to get rid of the frameskip/stutter, what ever it is without using fixedtic 1?

For Doom 3 or Prey? You could try setting a custom resolution with a 62.5hz refresh rate, some LCDs might accept it, but most likely you'll need a CRT or a VRR LCD.

For Quake 4? Use Quake4Tweaker.

Why don't you want to use fixedtic 1 though? As I said, it runs fine if you run at appropriate quality settings for your GPU. If you don't, well you get framerate stutters or slowdown. There's no magic way to gain more performance.

I guess i Will use the fixedtic 1 command.

Thank you for the help 😀