Wall time of a DFT energy evaluation in hours

  • Runtime of the Q-Chem software with its own CPU integrator compared it to the BrianQC GPU integrator module for multiple system sizes.

  • Input geometry optimization was carried out with OpenBabel using the MMFF94 force field.

  • cc-pvdz basis up to 10 000 basis functions

  • x axis: number of basis functions in the randomly generated hydrocarbons

Speedup of a DFT energy evaluation with BrianQC module

  • The speedup caused by the BrianQC GPU integrator with respect to the molecule size.

  • Input geometry optimization was carried out with OpenBabel using the MMFF94 force field.

  • cc-pvdz basis up to 10 000 basis functions

  • x axis: number of basis functions in the randomly generated hydrocarbons

Wall time of a Hartree-Fock energy evaluation in hours

  • Runtime of the Q-Chem software with its own CPU integrator compared to the BrianQC GPU integrator module for multiple system sizes.

  • The measurement systems are all branching hydrocarbons generated randomly for the measurement.

  • Input geometry optimization was carried out with OpenBabel using the MMFF94 force field.

  • cc-pvdz basis up to 10 000 basis functions

  • x axis: number of basis functions in the randomly generated hydrocarbons

Speedup of a Hartree-Fock energy evaluation with BrianQC module

  • The speedup caused by the BrianQC GPU integrator with respect to the molecule size.

  • The measurement systems are all branching hydrocarbons generated randomly for the measurement.

  • Input geometry optimization was carried out with OpenBabel using the MMFF94 force field.

  • cc-pvdz basis up to 10 000 basis functions

  • x axis: number of basis functions in the randomly generated hydrocarbons

Comparison to TeraChem

  • Q-Chem 5.1.2 with BrianQC GPU module 0.8.0 on 1 GTX 1080 Ti GPU

  • TeraChem v1.93P on 1 GTX 1080 Ti GPU

  • x axis: wall time of a Hartree-Fock level energy evaluation in 6-31G* basis set

Comparing different hardware setups

  • Q-Chem 5.1.2 with BrianQC GPU module 0.8.0 on 1 GTX 1080 Ti GPU

  • Q-Chem 5.1.2 on 16 Cores of Intel Xeon E5-2620 v4

  • Q-Chem 5.1.2 on 8 Cores of Intel Xeon E5-2620 v4

  • x axis: wall time of a Hartree-Fock level energy evaluation in cc-pVTZ basis set

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