



The latest official BIOS version for GA0402 boards is A12 (released 2010). You can still find it on Dell’s support site under OptiPlex 755.
The part number GA0402 is most commonly associated with the OptiPlex 7040 Micro (the tiny pizza-box size). dell e93839 ga0402 motherboard specs upd
Dell’s official documentation for the GA0402 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. The latest official BIOS version for GA0402 boards
| Feature | Specification | | :--- | :--- | | Model Number | E93839 / GA0402 (CN-0GA0402) | | Compatible System | Dell OptiPlex 7040 (MT, SFF, Micro) | | Chipset | Intel Q170 Express (C610 Series) | | CPU Socket | LGA 1151 (Skylake, 6th Gen only*) | | CPU Support | Intel Core i3, i5, i7 (6th Gen), Pentium, Celeron | | Memory Slots | 2 x DDR4 DIMM Slots (Dual Channel) | | Max Memory | 64GB DDR4 (2133MHz / 2400MHz downclocked) | | Storage Connectors | 1x M.2 PCIe NVMe Slot, 1x M.2 WiFi Slot, Standard SATA 6Gb/s ports | | Video Outputs | DisplayPort, HDMI (varies by chassis form factor) | | LAN | Intel I219LM Gigabit Ethernet | | USB | USB 3.0 / USB 3.1 Gen 1 support | | Power Connector | 12V DC Input (for Micro) or Standard 24-Pin (Tower/SFF variations apply) | i7 (6th Gen)



