I didn't even think of that… i just tried the 64-bit Darkmod.exe, and, i don't have nearly as much lagging and stuttering as with the 32-bit version indeed. E.g., in the training mission, in the jumping and climbing training room, i got bad stuttering, when i entered the first area through the hole in the wall. With the 64-bit version, i don't get any stuttering. Only when i move, it slightly stutters the whole time, which is a bit weird.
Here's the link to my system again:
http://forums.thedar...-here/?p=342668
BTW, is the 64-bit version new with this update? I wasn't aware there is a 64-bit executable.
Your system info link doesn't specifically answer these:
What Nvidia Driver version do you have installed?
Example: 397.64 ?
What Windows 10 update do you have installed?
Example: April Update 1803 ?
Are Nvidia "Threaded Optimizations" enabled?
Yes \ No ? (Default = Yes. In most modern drivers this should be yes but older drivers stutter in OpenGL with this setting.)
I can suggest that you try these Darkmod.cfg changes:
Multi-core profile (optimized for threading):
seta com_fixedTic "1"
seta com_smp "1"
seta r_useBfgPortalCulling "1"
seta r_useMapBufferRange "1"
seta tdm_lg_split "0"
seta tdm_lg_interleave_min "1"
Single Core profile. Better for systems that don't do threaded OpenGL well.
seta com_fixedTic "1"
seta com_smp "0" (or 1)
seta r_useBfgPortalCulling "0"
seta r_useMapBufferRange "0"
seta tdm_lg_split "1"
seta tdm_lg_interleave_min "1"
seta tdm_lg_interleave "2" (experiment with values between 2, 3, ..., and 8)
finally, r_softShadowsQuality 48 is high or very high from my recollection.
Try lowering to medium then adjust your r_softShadowsRadius to a value where it blurs to your taste (experiment between 1 to 20).
Then gradually increase the r_softShadowsQuality value in the console by increments of 5
r_softShadowsQuality 24
r_softShadowsQuality 30
r_softShadowsQuality 35
until you hit a value that roughly has acceptable performance on a heavy map but also has better quality than medium.
Then experiment with single digit changes to tweak further. 35, 36, 37, etc.