The , also known by its HP codename Kaili , is a micro-ATX (uATX) motherboard manufactured by MSI for HP desktop systems like the Envy 700 and Envy Phoenix 810 . While HP does not publish a standalone "owner's manual," the critical technical details for upgrades and repairs are summarized below. Core Specifications
The is the printed circuit board (PCB) identification number for the MSI H81M-E33 motherboard. Manufactured by Micro-Star International (MSI), this board was released as a budget-friendly, entry-level solution based on the Intel H81 chipset. It is designed to support Intel’s 4th Generation Core processors (codenamed "Haswell"). ms-7826 motherboard manual
4 DDR3 DIMM slots supporting up to 32GB of non-ECC memory (1333MHz or 1600MHz). Expansion Slots: 1 PCI Express x16 (Gen 3.0). 3 PCI Express x1 (Gen 2.0). 1 half-length mini card slot (typically for Wi-Fi). Key Connectors & Layout The , also known by its HP codename
The manual shows no native M.2 slot. However, you can use a PCIe adapter card in the x16 slot. The manual confirms that BIOS booting from NVMe is not supported unless you modify the UEFI yourself. Use it as a storage drive only. Expansion Slots: 1 PCI Express x16 (Gen 3