It's the Biostar Geforce 6100-M7, $65 shipped at newegg.
I have both of the Sempron 2800+ running on a 280MHz fsb for 2240MHz with the core voltage at +10%. They would easily boot at 300MHz fsb, but not quite 100% stable, not sure if it was the cpu or motherboard holding it back. Using the stock AMD cooler on both of these, full load temps are below 50c.
Generic PC3200 is running cas 2.5 at 1t command @ 210MHz (DDR 420MHz).
The 6100-M7 had onboard Geforce 6100 video, but I threw a couple of cheap Radeon X700 in there. These boards are a fantastic bang for the buck if you need a cheap solution with a cpu based memory controller for gaming, you can always upgrade to a socket 754 clawhammer (1MB L2 cache).