Here’s a detailed write-up regarding the , typically found in certain Dell OptiPlex systems (such as the OptiPlex 3020, 7020, or 9020 models from the Haswell era). Write-Up: Dell N15235 Motherboard (System Board for OptiPlex 3020/7020/9020) 1. Overview The N15235 is a proprietary micro-ATX (or custom DTX) motherboard manufactured by Dell for its fourth-generation Intel Core-based OptiPlex desktops. It is not a retail board; it’s designed specifically for Dell’s chassis and power supply units (PSUs). The board supports Intel’s LGA1150 socket (Haswell and Haswell Refresh CPUs) and is commonly found in small form factor (SFF), mini tower (MT), and desktop (DT) variants of the OptiPlex 3020, 7020, and 9020.