Microstar Ms 6340
Specs: Socket 478 Chipset: Northbridge: Intel Brookdale GL (i865G) Southbridge: Intel ICH4 (FW82801EB) sound chipset Etc. Your mboard is probably an OEM only model - made only for brand name system builders - there is probably no info about it on the MSI web site. Retail Socket 478 mboards list here - ones with 865Gxxx would be very similar If you need pinouts, e.g. For USB headers, front panel (power switch, power led, hdd led, etc.), front audio and mic, other retail mboards with the 865Gxxx main chipset and and 67xx model numbers probably have identical pinouts - look them up on the MSI web site. If you need drivers - main chipset and onboard video drivers for the 865 series - the Intel web site - X86's link - if you search with: MS-6772 Ver. 1 drivers on the web, there are'hits' for drivers for it.
Ms 6340 Ver 5 Motherboard
Ok, ive found it. I take it your using an off the shelf PC? It looks like an OEM board. Heres the manual According to it, you can squeeze.