The original post: /r/nvidia by /u/CoffeeBlowout on 2025-02-21 21:24:51.

As title suggests, I discovered a way to enable MFG or Multi Frame Gen on 40 series on accident, at least it seems to work. Although it’s not perfect on the devices I’ve tested, it does increase FPS. However as with all FG, it comes with added input latency, with 3x being pretty good.

Unfortunately I sold off my 40 series desktop cards, and only have a 4070 and 4090 laptop to test. But in my testing, both increased performance/FPS. I tested this with a 240Hz OLED with variable refresh rate and displayed the FPS/refresh rate on screen. It matches to output FPS, so I know the displayed fps and refresh are working correctly.

I found this last night after wanting to enable Multi Frame Gen in Killing Floor 3 Beta with my RTX 5080. I simply attached that .exe to the Cyberpunk 2077 .exe in Nvidia Profile Inspector (I am using version 2.4.0.17) and enabled the option DLSS-FG Multi-Frame-Generation Count to 4x. This worked and enabled multi frame gen in a game without it supporting mulitframe gen (it supports regular at the moment in the menu).

This morning I thought I’d try to force the same on my 40 series laptop. To my complete shock, it worked. I simply pointed the KF3.exe at Cyberpunk.exe in nvidia profile inspector and it enabled multiframegen.

Then I tried other games like Cyberpunk 2077 or Hogwarts and Alan Wake II. These had the same old black screen issue. I thought this was odd, so I then decided something must be blocking it. So I simply replaced the Nvidia nvngx_dlssg file with version nvngx_dlssg_3.7.10. Restarted the games and it worked. Multi Frame Gen was enabling higher FPS, and no black screens on a 40 series.

Now it does seem that 4x for the 4070 was far too much and felt heavy, and pacing felt off a bit. Obviously the GPU is overloaded and can’t keep up and the base frame rate is too low. But 3x felt better. I tested the 4090 laptop and similar story, but 4x is usable depending on the resolution/settings. Both achieved higher FPS in games.

I’m not saying it’s perfect, but it does seem to work and I’m sure hoping Nvidia eventually enabled 3x on 40 series cards. I assume the new dlssg file has optimizations that seem to be blocked on 40 series as it causes a black screen.

Desktop cards like 4080 and 4090 should fair even better. I also found full screen and adaptive sync enabled helped frame pacing.

Edit: After some others have tested, it’s likely not working correclty and just doubling the frame. The FPS number goes up, the refresh rate goes up, but it doesn’t really generate the smoothness expected over lower FPS. Maybe someone else can figure it out or a mod to enable it properly. I’m just not sure, I messed around with this in a few games today, all generated higher fps, but can’t quite get it to work properly it seems. Maybe we need to use other files, or maybe it just won’t work. Hopefully someone else can figure it out.