Dell’s official documentation for the originally listed support for up to Intel Core 2 Duo E8600 (3.33 GHz, 1333 MHz FSB) and Core 2 Quad Q9650 (3.0 GHz). However, after BIOS update A11 or A12 (from Dell in 2009–2010), the board can accept later 45nm LGA 775 chips.
Related search suggestions provided.
: Ensure your power supply matches the proprietary Dell connectors, as some OptiPlex 780 variants use different power configurations. dell e93839 ga0402 motherboard specs upd
The latest official BIOS version for GA0402 boards is (released 2010). You can still find it on Dell’s support site under OptiPlex 755. : Ensure your power supply matches the proprietary
| Problem | Solution | |---------|----------| | No POST after CPU upgrade | Clear CMOS (jumper or battery removal). Update to BIOS A12 first. | | Front panel wiring confusion | Use Dell OptiPlex 790 pinout diagram (Power SW: pins 4 & 6 on header). | | Fan runs at 100% | Wrong fan header – use CPU_FAN for CPU cooler; SYS_FAN for case fan. | | GPU not recognized | Disable Secure Boot; force Legacy ROM in BIOS. | | Problem | Solution | |---------|----------| | No
Dell’s official documentation for the originally listed support for up to Intel Core 2 Duo E8600 (3.33 GHz, 1333 MHz FSB) and Core 2 Quad Q9650 (3.0 GHz). However, after BIOS update A11 or A12 (from Dell in 2009–2010), the board can accept later 45nm LGA 775 chips.
Related search suggestions provided.
: Ensure your power supply matches the proprietary Dell connectors, as some OptiPlex 780 variants use different power configurations.
The latest official BIOS version for GA0402 boards is (released 2010). You can still find it on Dell’s support site under OptiPlex 755.
| Problem | Solution | |---------|----------| | No POST after CPU upgrade | Clear CMOS (jumper or battery removal). Update to BIOS A12 first. | | Front panel wiring confusion | Use Dell OptiPlex 790 pinout diagram (Power SW: pins 4 & 6 on header). | | Fan runs at 100% | Wrong fan header – use CPU_FAN for CPU cooler; SYS_FAN for case fan. | | GPU not recognized | Disable Secure Boot; force Legacy ROM in BIOS. |