Dell E93839 Motherboard Schematic High Quality Better [updated] Jun 2026

Features the Intel Q45 Express chipset, supporting up to 16GB of DDR3 RAM and Intel Core 2 Quad processors. OptiPlex 790/390 (LGA 1155):

3.3V_STB and 5V_STB should be present as soon as the PSU is plugged in. Memory Rails: DDR3: 1.5V DDR3L: 1.35V DDR4 (on newer 9020/7020 boards): 1.2V dell e93839 motherboard schematic high quality better