Custom Resolution Utility (CRU)

[Man]

So, I've this old Asus VH222 1080p 75Hz monitor, paired with a R9 380. As you can tell, this setup is ancient and the R9 380 is essentially a 1050Ti that consumes almost 3x more power.

Now the thing is, this setup is no longer able to hit solid 60, let alone 75. So, what I've done is underclocked my monitor to various refresh rates (40/45/48/50Hz) via CRU. When I can't hit 75, I just move down to 60 > 50 > 45 so on (48Hz is just for films).

The problem is that it's getting harder to maintain even solid 45FPS and when I set the refresh rate to 40Hz, the input lag just gets unbearable. It feels fine at 45Hz, BTW. My question is, is there a way to improve input latency?

Detailed resolutions have lots of parameters etc. so I was wondering if it's possible to somehow "tighten" the monitor's timings or something at 40Hz, just to make it more bearable? For example, high refresh rate monitors often suck at 60Hz because they introduce a lot of input lag and I feel like I'm facing a similar "phenomenon" at 40Hz on my 75Hz monitor.

Like for example, the Asus VG279QM has extremely high input lag at 60Hz, as per Rtings: https://www.rtings.com/monitor/reviews/a...#test_1435

So, is there a way to lower the input lag or am I all out of luck?

Thanks in advance.