Hi all
Sorry for reviving a somewhat dead thread, but it didn't seem to have a solution, and I am also suffering from the same issues.
My FPS will typically hover around 60 fps (ya, vsync is on, but i had it off and the problem remained), but will drop to ~30 and even down to 20 at times of high action, or when joining a team on servers that make sure of the autohelp text windows that flood your screen. I have reviewed multiple other threads that reported similar issues and have tried everything I saw. Here are the deets:
Windows XP X64
AMD64 3500+
1GB RAM
nVidia 8600 GTS (256MB)
No AV/FW software installed on this machine. That would be silly.
Config.cfg (truncated for relevance):
------------------------------------------
cl_cmdrate "30"
cl_dynamiclights "1"
cl_forcedefaultfov "0"
cl_gammaramp "0"
cl_highdetail "1"
cl_himodels "0"
cl_hudmapzoom "2"
cl_updaterate "20"
fps_max "100"
Steps I have already taken:
Enabled Triple Buffering
Disabled Antisotropic filtering
Disabled In-game Steam Community
Set hl.exe process priority to Low
Set hl.exe process priority to High
Killed all other process I could
Reinstalled NS (deleting the ns folder after uninstalling)
I've been monitoring the issue with net_graph 2, as it provides a graph of your PC's performance/demand (tho i'm not sure specifically what it details)


The first image, you can see, is normal; i'm facing a wall, and not much is goin on around me.
The second image, i'ld just walked into the hive, with fellow marines, and it's full of aliens and structures.
While not examplary performance loss, you can see in the net_graph, that i've lost about 20fps, and the pretty graph is goin all hay-wire. It's quite a debilitating problem, even if this example doesn't really show it. =P
So, I'm not too sure what else to try at this point. But if anyone has any ideas, I would love to hear from you.
Edit: and now a really annoying thing; since reinstalling it, I now have the issue mentioned above where each launch of NS, i have to set the priority to high or "above normal" otherwise i only get 20fps... before i reinstalled, i never had to do that. Weird... Must have something to do with the 32bit emulator....