ROG Swift Better Response Time from 1440p to 1080p

[Chrisn3108]

Hi Guys

Normally play BF4. When I lower the resolution on my Swift from 1440p to 1080p, the response time just feels better. It is definitely noticeable with no lag. I use the same video settings on both resolutions, all low or off except for mesh quality in ultra. I also get the same FPS, with max at 144 in G-sync mode.

Is something limiting the system in 1440p?? specs below:

MSI Z97 Gaming 7
i5 4670k at 4.2GHz
MSI GTX 980 in SLI
16G Ram 1600 speed

Oh! when I play at 1050 by 1600 its even faster.

Thanks
Chrisn

 

[ak47jar3d]

Response time is typically independent of resolution. The response time can be slighty affected by how many frames you getting. Panels typically have the fastest response when frames are at the panel's maximum. So when your frames are at 144hz, you should get the fastest response time.

 

[Suzuki@1473780084@1473780163]

You're confusing response time for input lag.

 

[Chrisn3108]

You're confusing response time for input lag.

Yes you are correct, the input lag is much lower at lower resolutions. Is it me or is this for real.

Thanks
Chris

 

[Falkentyne]

The input lag is lower because the FRAME RATE IS higher.
Especially when you are using anti-aliasing, and even more so, if you are using vsync (I think BF4 uses triple buffering vsync by default). So the lower the resolution, the faster the frame rate will be and the lower the input lag.

You bought a 1440p monitor. having lower frame rates and higher input lag is the cost of getting such a high resolution monitor for modern games. Such high resolutions are usually meant to be driven by extremely powerful hardware (we're talking Quad-SLI here), if you want to maintain 120+ FPS at all times, and then you have to deal with CPU limitations also (if the video hardware is fast enough to push 150 FPS, then the CPU may not be fast enough to crunch enough physics and math in game, and then that might hold you back).

But you do have a quite modern system, and in SLI, so I don't know what the problem is. Could be typical Nvidia driver problems....some recent versions have been very poor, especially for multi-card. Have you tried a different driver set?

From what I do remember, input lag that is in excess of the frame response time only occurs if the VIDEO CARD/graphics settings are holding the frame rate back. While if it's the CPU holding you back, you won't have extra input lag (e.g. if the CPU is holding you back to 60 fps, you will still have 16 ms response time (1000 / 60)=ms of frame time, but you won't have that huge swimming mouse on tar feel.

 

[Suzuki@1473780084@1473780163]

If you're confident you're hitting the same frames on both resolutions. Try playing with G-Sync off, because it's not actually magically outputting 144 frames, just because you have G-Sync on. 45 FPS G-Sync feels more like 60 FPS, if even that. I believe you're confusing your GPU actually rendering 144 FPS (1080), with thinking G-Sync magically creates the extra frames (1440). It's clever marketing from NVIDIA. What G-Sync does is that it takes care of your experience when your frames are fluctuating, it prevents stutter and screen tearing while keeping the input lag very low (it's higher than V-Sync OFF), which is really something next gen. People seem to think that it creates the remaining 60 frames or what have you, for you. Meaning... If you hit 45+FPS, it feels like 144 FPS, this is not the case.

If you are infact hitting 144 FPS at 1440p... Well I would contact the support team for Battlefield 4, you'll have much better luck with that to find out the cause of your increase in input lag when running a SLI configuration - it's their game.

 

[Chrisn3108]

I am using the perf overlay draw fps counter in BF4 config file. I also set the fps max to 200 in config file. While in the test range with G-sync off I am getting 195-200fps on screen and in the performance test under video settings I am getting 199 fps. This all at 1440p with low settings.

Pointless testing at 1080p because it will definitely be higher. Max fps is set to 200 to prevent stressing the CPU and GPUs. Around 215 I can hear the GPU fans starting to wind up.