Crashes when I play on DarkRP. (Garry's Mod)

Crashes when I play on DarkRP. What is the problem? When I'm just playing GMod on the server DarkRP (Not took off in the single, but on other projects in my opinion is also that), Then after some time I have crashes, no errors no warnings on the desktop.
CPU: Intel Core i5 3.2 Ghz 4370.
RAM: G. Skill Ares 2x4GB DDR3 1600Mhz and 2x8GB HyperX FURY DDR3 1600Mhz (24 RAM).
Video card: EVGA GTX 660 2GB.
Operating System: Windows 10 Pro x64.
Computer is 5-6 years.
Help RV!
PS Game License from Steam