I'm not positive, but I believe the max refresh @ 1280 x 1024 is 100hz...they suggest the optimal res setting as 1280 x 1024 @ 85hz. Mine will be here tomorrow and I'll let you know for sure..
CRT monitors don't really have a "native" resolution...that is strictly an LCD thing. 🙂
Also, on a side note for everyone, I found out through some research that the XF-9B 19" uses a different tube than the other XF models..the XF-9E and the XF-9P (discontinued). From what I can tell, it uses a Samsung Dynaflat tube. 🙂