MCP73 Series is a Integrated Chipset for Intel LGA775 Platform. It includes MCP73PV(NF7050-630I), MCP73S(NF7025-630I) and MCP73V(NF7025-610I).
In these three chipsets, most of spec are same, such as support Intel FSB1333/1000 CPU, SATAII, PATA, HDAUDIO, GB Lan, etc. However, there are little differences between the three of them.
1. MCP73PV supports Single DDRII800, MCP73S/V only support Single DDRII667
2. MCP73PV Supports HDMI & HDCP, MCP73S support HDCP, But MCP73V didnot support HDMI and HDCP.
The "Topstar" board shown is model TM-NF73SM. TM-NF73SM uses NF7050-630I which supports LGA775 CPU, DDRII 800 Single Channel, SATAII, PATA, Gb Lan, HDaudio, etc. In addition, Topstar added a Debug LED on I/O Panel, which is a useful feature for DIY users to diagnose board problems.
More info at OCW.