Spiral antenna simulation time

I m working 2 to 18 g spiral
N 27
Track width .2mm
Spacing .2mm
It is taking huge time my machine 48 gb ram more than 8 hours still result pending
Any clue

which software are you using? CST or HFSS? what type of graphic card are you using? not all type of graphic card supports simulation acceleration. make sure your simulation software support your GPU. RAM is just for simulation space! it does not significantly affect simulation speed.