HP system board 657094-001 is a replacement motherboard part listed for the HP Compaq 8300 Elite Small Form Factor, for models without Windows 8. It is intended for servicing that specific desktop platform.
The system reference identifies an Intel Q77 Express chipset and support for Intel Core i7, i5, i3 and Pentium processors. It lists non-ECC DDR3 PC3-12800 memory, with system memory support up to 32 GB.
For expansion, the SFF system uses low-profile slots: two PCIe x16, one PCIe x1 and one PCI slot. The board listing also notes that replacement thermal material is included. This is the -001 system-board version; HP lists other suffixes for certain Windows 8 configurations.