# How fast is a GPU compared to a CPU for training deep learning models, and which GPU should I buy? [closed]

First of all, I don't play games at all, and I am still quite new to deep learning. I was using AlexNet (transfer learning, actually) in MATLAB to classify images in my current laptop (i5-3230, without any GPU). And it was taking roughly 25-30 hours to finish training, and I don't dare using GooLeNet.

I have to buy a laptop. How fast will be if I use GPU?.