|  |  | ACP-2000P3-00BE | ACP-2000P4-00BE | 
        
            | Disk Drive Bay | Slim ODD | 1 | 1 | 1 | 
        
            | 3.5" Front-Accessible | 2 | 2 | 2 | 
        
            | Cooling | Fan | 2 (8 cm / 47 CFM each) | 2 (8 cm / 47 CFM each) | 2 (8 cm / 47 CFM each) | 
        
            | Air Filter | Yes | Yes | Yes | 
        
            | Front I/O Interface | USB | 2 | 2 | 2 | 
        
            | PS/2 | 1 | 1 | 1 | 
        
            | Miscellaneous | LED Indicators | Power, HDD, temperature, fan | Power, HDD, temperature, fan | Power, HDD, temperature, fan | 
        
            | Rear Panel | One 9-pin D-Sub opening | One 9-pin D-Sub opening | One 9-pin D-Sub opening | 
        
            | Intelligent System Module | Remote Monitoring | CPU/System fan speed , CPU/System temperature , motherboard voltage | CPU/System fan speed , CPU/System temperature , motherboard voltage | CPU/System fan speed , CPU/System temperature , motherboard voltage | 
        
            | Environment | Operational Temperature | 0 ~ 40° C (32 ~ 104° F) | 0 ~ 40° C (32 ~ 104° F) | 0 ~ 40° C (32 ~ 104° F) | 
        
            | Non-Operational Temperature | -20 ~ 60° C (-4 ~ 140° F) | -20 ~ 60° C (-4 ~ 140° F) | -20 ~ 60° C (-4 ~ 140° F) | 
        
            | Operating Humidity | 10 ~ 85% @ 40° C, non-condensing | 10 ~ 85% @ 40° C, non-condensing | 10 ~ 85% @ 40° C, non-condensing | 
        
            | Non-Operating Humidity | 10 ~ 95% @ 40° C, non-condensing | 10 ~ 95% @ 40° C, non-condensing | 10 ~ 95% @ 40° C, non-condensing | 
        
            | Operating Vibration | 0.5 Grms | 0.5 Grms | 0.5 Grms | 
        
            | Non-Operating Vibration | 2 G | 2 G | 2 G | 
        
            | Operating Shock | 10G, half sine wave, 11 ms duration | 10G, half sine wave, 11 ms duration | 10G, half sine wave, 11 ms duration | 
        
            | Non-Operating Shock | 30 G | 30 G | 30 G | 
        
            | Physical Characteristics | Dimensions (W x H x D) | 482 x 88 x 451 mm (19'' x 3.5'' x 17.8'') | 482 x 88 x 451 mm (19'' x 3.5'' x 17.8'') | 482 x 88 x 451 mm (19'' x 3.5'' x 17.8'') | 
        
            | Weight | 11.5 kg (25.3 lb) | 11.5 kg (25.3 lb) | 11.5 kg (25.3 lb) |