Limiting HLDS Server FPS

[pengy]

Server OS: Centos 5.3 64bit 2.26.28 Vanilla Kernel
Processor: Intel Core2Quad Q9850 2.83 Ghz
Ram: 8
Game(s): All HL1 Games
Start Up Command: hlds_run -game cstrike +ip 192.168.1.230 +port 27015 +maxplayers 12 +sys_ticrate 571 +fps_max 512 -pingboost 3

How do I limit the server FPS to 512, when I use the command above, the fps floats around 460-470, and can never get above 500, when I try it with 600 or higher, the fps spikes up to the number I set it to, but then sits around 460 again.

[matte563]

Tried a custom kernel?

http://wiki.fragaholics.de/index.php/EN:Linux_Kernel_Optimization

[pengy]

RT kernels fck up everything on the server... (never touches 1000)

[matte563]

Skip the RT part then? :p

EDIT: Just apply the kernelsettings etc..

[pengy]

Even worse...