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It can automatically recalculate the force constants every n th step of the geometry optimization. It has got improved parallel performance on larger number of processors and it also speeds up the critical parts of several calculation types. This application has got support for NVIDIA k40 and K80 GPUs on the Linux systems and also for HF and DFT calculations.
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Gaussian 09W 9.5 Revision D.01 brings a very wide variety of new methods, property predictions as well as performance enhancements.
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