Update:
Been trying out different BIOS configurations to see which settings provided the best responsiveness. This usually involved me messing with certain RAM timings or other BIOS settings.
Melkxz wrote: ↑19 Jun 2022, 11:24
People were being sarcastic on this forum when I said I fixed my input lag mostly by using custom timing values.
I have corsair vengeance 3200mhz cas 16 on asus B550 rog strix (2/4 slots) :
recommanded timings : 16 - 18 - 18 - 36 -
54 for 3200mhz =>
unstable
Never got them stable for these values : had to increase tRC to
56 or lower ram speed to 3000mhz => stable input lag looks ok
XMP/DOCP profile gives me : 16 - 18 - 18 - 36 -
75 =>
insane input lag
It didn't fix all my mouse issues but my mouse went significantly snappier after this.
This post sparked me going into my bios and changing around some RAM timings to see if it could get more responsive.
My BIOS (at D.O.C.P.) defaulted my ram to 14-15-15-15-35-
82, rather than 50 as per my RAM's SPD.
First i tried stock D.O.C.P, which was decent, but far from the best, but was better than every other RAM kit i've tested, as 3600 CL14 is pretty quick compared to other RAM kits, even at 2T.
Stock D.O.C.P. Timings with a command rate of 1T, Gear Down Mode disabled.
14-15-15-35-
50, 1T, GDM Disabled.
14-15-15-15-50, 16 TFAW (compared to D.O.C.P 38), 1T, GDM Disabled.
14-15-15-15-50, 16 TFAW, GDM Disabled, PDM Disabled, CState and DF C states disabled, 1T.
and 14-15-15-15-82, 16 TFAW, 1T, GDM Disabled.
After testing each configuration and clearing CMOS each time, i've come to find out that
Running my RAM at default D.O.C.P. Settings with GDM Disabled, 1T, and TFAW at 16 provided the best responsiveness so far.
Lowering tRC seemed to not help in providing more responsiveness, even with lowered TFAW (If i had to guess, it's probably because that config wasn't
stable). Command rate of 1T with GDM disabled also aided in better responsiveness.
82 tRC may be well over the tRC my RAM has for it's OC Config on the SPD, but i guess it's more important that your ram be stable before fast. I'm guessing i can lower my tRC quite a bit (alongside tRFC too) by a decent amount as they are quite high for samsung B-die, and achieve even better responsiveness, but i'm inexperienced with how to get the most out of those values without making my ram unstable.
If anyone knows that'd be great.