> > > (500000 ts instead of 5000 ts, otherwise it's too fast) > > > That would be a factor of about 227!
On an available machine (not used for simulations) self-compiled 2018.3, CUDA 9.1 the similar result, factor is about 136: Working dir: /home/user/dev/gromacs/gmxbench-3.0/d.poly-ch2 Command line: gmx mdrun -ntmpi 1 -nt 6 Running on 1 node with total 6 cores, 6 logical cores, 1 compatible GPU Hardware detected: CPU info: Vendor: Intel Brand: Intel(R) Core(TM) i5-8600K CPU @ 3.60GHz GPU info: Number of GPUs detected: 1 #0: NVIDIA GeForce GTX 1050 Ti, compute cap.: 6.1, ECC: no, stat: compatible On 1 MPI rank, each using 6 OpenMP threads Core t (s) Wall t (s) (%) Time: 1102.853 183.809 600.0 (ns/day) (hour/ns) Performance: 235.027 0.102 Finished mdrun on rank 0 Tue Sep 11 01:53:36 2018 -- Best regards, Olga Selyutina -- Gromacs Users mailing list * Please search the archive at http://www.gromacs.org/Support/Mailing_Lists/GMX-Users_List before posting! * Can't post? Read http://www.gromacs.org/Support/Mailing_Lists * For (un)subscribe requests visit https://maillist.sys.kth.se/mailman/listinfo/gromacs.org_gmx-users or send a mail to gmx-users-requ...@gromacs.org.