Brand: Dell
Category: Desktop Computer
Document Type: Manual
Language: EN
Available Languages: EN , ES
Manual for QQQQ_1757650379_b82cf4f0_Model_b82cf4f0_98
Uploaded: Sept. 12, 2025, 4:15 a.m.
The Dell OptiPlex 755 is a robust mainstream desktop designed to meet current and future business needs. It offers versatile solutions with options for scalable remote client management, including ASF 2.0, Intel AMT 3.0, and full Intel vPro processor technology. Key features include Energy Smart for power efficiency, advanced security solutions with Intel vPro and RAID 1 support, and simplified deployment services like ImageDirect. The system is available in various chassis types: Mini Tower (MT), Desktop (DT), Small Form Factor (SFF), and Ultra Small Form Factor (USFF). Each form factor has specific configurations for components like memory, drives, and connectors. The manual details the marketing configurations, engineering specifications, chassis requirements, and regulatory compliance information, including acoustic noise emissions.
Troubleshooting and error codes
| Feature Setting | DRIVES | Default Value |
|---|---|---|
| SATA-0: | Depends on chassis and HDDs installed | |
| SATA-1: | Depends on chassis and HDDs installed | |
| SATA-21: | Depends on chassis and HDDs installed | |
| SATA-32: | Depends on chassis and HDDs installed | |
| External SATA3,4: | On | |
| SATA Operation: | RAID Autodetect/AHCI | |
| SMART Reporting: | Off | |
| Integrated NIC: | ONBOARD DEVICES | On |
| Integrated Audio: | On | |
| USB Controller: | On | |
| Rear Quad USB: | On | |
| Rear Dual USB: | On | |
| Front USB: | On | |
| PCI Slots3: | On | |
| LPT Port Mode: | PS/2 | |
| LPT Port Address: | 378h | |
| Serial Port #1: | Auto | |
| Primary Video³: | VIDEO | Auto |
| Multiple CPU Core: | PERFORMANCE | On |
| SpeedStep: | Off | |
| Virtualization: | Off | |
| VT for Direct I/O: | Off | |
| Limit CPUID Value: | Off | |
| HDD Acoustic Mode: | Bypass | |
| Admin Password: | SECURITY | (none) |
| System Password: | (none) | |
| SATA-0 Password: | (none) | |
| SATA-1 Password: | (none) | |
| SATA-2 Password¹: | (none) | |
| SATA-3 Password2: | (none) | |
| External SATA Password3,4: | (none) | |
| Password Changes: | Unlocked | |
| TPM Security: | Off | |
| Execute Disable: | On | |
| Computrace®: | Deactivate | |
| AC Recovery: | POWER MANAGEMENT | Off |
| Auto Power On: | Off | |
| Auto Power Time: | 12:00 AM | |
| Low Power Mode: | Off | |
| Remote Wake Up: | Off | |
| Suspend Mode: | S3 | |
| Service Tag: | MAINTENANCE | System specific |
| SERR Message: | On | |
| Load Defaults: | Cancel | |
| Event Log: | Mark All Entries | |
| Fast Boot: | POST BEHAVIOR | On |
| Numlock Key: | On | |
| POST Hotkeys: | Setup & Boot Menu | |
| MEBx Hotkey: | On | |
| Keyboard Errors: | Report |