Link: Gaussian 16w

Even with a GUI, Gaussian has a steep learning curve. If you are diving in, keep these technical "gotchas" in mind:

Gaussian 16W is demanding on hardware. To run effectively, users need: gaussian 16w

Gaussian 16W is highly sensitive to scratch disk speed. A slow hard drive can make a calculation that takes 10 hours on an SSD take 100 hours on an HDD, even with the same CPU. Even with a GUI, Gaussian has a steep learning curve

But this time, she’d chosen differently. with an ultrafine integration grid. A def2-TZVPP basis set. And she’d added the Opt=VeryTight and Int=UltraFine keywords like a priest scattering holy water. Even with a GUI