# Error / Bug
## Anti-Cheat: Gepard Shield 3.0
- "Gepard::T Code: 2::1::8"
- "Gepard::T Code: 2::1::12"
# Suggestion / Solution
## VM on ARM
- Reduce the number of processors to 2 or 4
- 2 CPUs provide the smoothest performance for RO
## PC on ARM
- Set the client to force single-core operation
- -> Properties
- -> Compatibility
- -> Change emulation settings
- -> Use advanced settings
- -> Force single-core operation
# Observation
## ARM
- The client with Gepard Shield 3.0 occupies all processors
- The errors seems to only occur on ARM
## x86_64
- The client with Gepard Shield 3.0 mainly occupies 2 processors
- Runs well without any errors
# Test Log
## VM on ARM
- Device: Apple MacBook Pro (14-inch, M3 Max, Nov 2023)
- System: Parallels 19.0.0 + Windows 11 Pro 23H2 ARM
- 2 CPUs: Passed > 6 hr
- 4 CPUs: Passed > 3 hr
- 6 CPUs: Failed < 15 min
- 8 CPUs: Failed < 1 hr
- 10 CPUs: Failed < 2 min
- 12 CPUs: Failed < 2 min
## VM on x86_64
- Device: Apple MacBook Pro (Retina, 15-inch, Mid 2015)
- System: Parallels 18.1.0 + Windows 7 Ultimate Server Pack 1 x64
- 4 CPUs: Passed > 1 hr
- 8 CPUs: Passed > 2 hr
## PC on x86_64
- Device: Intel i7-7700K (4 Core 8 Thread)
- System: Windows 11 Pro for Workstations 22H2 x64
- 8 CPUs (Logical processors): Passed > 4 hr