I have an MSI mATX mainboard, not entirely sure which model it is, got it off ebay with no documentation. cpu-z tells me it has the rs482 chipset whilst pcmark05 tells me it's rs480. The ebay listing claimed the model no. was RX480M2-IL.
Still from what I can make out from the MSI website they seem to use the same bios, which I need to update at some point as I have all kinds of annoying little problems.
Otherwise it seems to perform okay, although I think I'll be upgrading at some point soon... to a mobo that isn't MSI!