r/deeplearning - CPU Clock Speed or Number of Cores?

I am building a PC that is going to be used for training neural networks. My GPU is going to be the RTX 3080 (when it releases in Q3 2020) and I have two options for the CPU. Either the i5-9600k or the Ryzen Threadripper 1900x (both are the same price). However, I cannot decide which one to purchase. The 1900x has 8 cores instead of the 6 core 9600k, but the i5-9600k can overclock to 5ghz while the Threadripper cannot.