Single core CPU performance is pretty much too low in today's standards. With 4 cores, it just barely exceeds my Core i5 low power tablet when using only 1 core. That Pentium chip isn't also overclockable due to locked multiplier. See geekbench score here:

Hewlett-Packard HP 15 Notebook PC vs Microsoft Corporation Surface Pro 3 - Geekbench Browser

If your games only use 1 core, expect huge performance hit. Your games should run fine if it's able to use all of the cores.