I have an Intel Core i3 CPU m 380 @253GHz, and I had tried to play a HEVC file in VLC; it played but not smoothly(RAM is 4GB).

However, I have another laptop of with Pentium R Dual-Core CPU T4500 @2.30GHz (RAM is 2GB). And the same HEVC file plays smoothly on this system.

Both shares Integrated Intel Graphics Chip.