Hi all,<div><br></div><div>I have been using the CP2K-Gromacs package on the Archer2 HPC for QM/MM with the BLYP functional, but would like to start using B3LYP. I have run some benchmarks with SPE's for the 2 functionals and my ~30 QM atom system but the performance of B3LYP is around 20 times worse for B3LYP compared to BLYP. Is this to be expected? This seems like a very large cost increase that I did not expect. I am running with 32 tasks each with 4 threads.</div><div><br></div><div>I would be very grateful to receive any insight into whether this kind of performance is expected, and/or if there are any obvious performance improvements I should investigate.</div><div><br></div><div>I have attached the two input files to this post, but the PDB is too large to share directly. It can be found here: <a href="https://app.box.com/s/yyo8cfwsd1rz8n35h02bckyr0cer0lq5">https://app.box.com/s/yyo8cfwsd1rz8n35h02bckyr0cer0lq5</a></div><div><br></div><div>Thank you!</div><div><br></div><div>Max</div>
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