[gmx-users] normal mode analysis

[xiao]

Dear gromacs users,


I am interested in normal mode analysis, but i have no idea about the time needed for NMA compared with the regular MD.


My friend who uses NAMD, and he told me that the NMA took much time. The reason  may be that he used all-atom force field, can anyone tell me whether gromacs  also use all-atom force field to do the NMA?  


Bset regards,


Fugui