I'm in Ubuntu 8.04 right now using AX78 with 9850, for over 3 hours now, benchmarking mainly.
I'm using stock BIOS and it booted and runs perfectly. I'm using my MSI board settings, 2700MHz stock voltage, 1.288v, just placed a heatsink on it but its not attached and there's only old TIM The PWM are running quite cool, cooler than MSI board and far cooler than DFI M2R. Only got 1 stick in yet, busy online yet.

http://imageupload.com/out.php/i111441_Screenshot1.png
http://imageupload.com/out.php/i111440_Screenshot.png

The 43/44C is BIOS reported temp.

Board fails POST with C1 using 1066/1000 RAM modules but works perfect with 800 RAM modules. It also boots very weird timings but has CPU-NB voltage control although there is no NB-FID option in this BIOS and I do have it on other boards.