The is the system board (motherboard) designed by Dell specifically for the OptiPlex 790 series desktops. While Dell uses various part numbers for their boards (such as CN-0J77C or 04G2P2), the string "M1H61R" is often silk-screened directly onto the board or found in diagnostic logs, serving as the primary identifier for this specific hardware revision.
Dell MIH61R (often searched as M1H61R) is a reliable, Micro-ATX motherboard originally designed for Dell’s business-class and entry-level desktop lines, most notably the Dell OptiPlex 3010 OptiPlex 390 . It is also found in consumer models like the Inspiron 620/620s Vostro 260 Core Technical Specifications Built on the Intel H61 Express chipset dell m1h61r mb
The M1H61R features an LGA 1155 CPU socket. This socket is compatible with Intel’s 2nd Generation Core processors. While it does not officially support the 3rd Generation "Ivy Bridge" chips (such as the i7-3770) without a BIOS update (which Dell rarely provided for this specific board revision), it excels with Sandy Bridge CPUs. The is the system board (motherboard) designed by
, this board is tailored for stability and essential office productivity rather than high-end performance. Socket & Processor Support: Features the LGA 1155 (Socket H2) It is also found in consumer models like